Optical module, optical splitting / integrating device, optical connector, optical module, and communication system

Abstract

The invention provides an optical module, an optical splitting and combining device, an optical connector, an optical assembly and a communication system, and belongs to the technical field of optical communication. In the light sending direction, each light emitting assembly of the light module sends a path of light beam to the light annular device. The optical annular device receives the multiple paths of light beams and sends the light beams to the wave splitting and combining assembly. And the wave splitting and combining assembly combines the multiple paths of light beams and sends the combined light beams to the outside through the single-fiber bidirectional optical interface. In the light receiving direction, the wave splitting and combining assembly splits a light beam received through the single-fiber bidirectional optical interface into multiple paths of light beams and sends the multiple paths of light beams to the light annular device. The optical annular device sends one path of light beam to each optical receiving assembly. Visibly, the optical annular device transmits multiple paths of narrow-band light beams, and the single-fiber bidirectional optical interface transmits one path of wide-band light beams. According to the optical module, the optical ring device is arranged to process the multiple paths of light beams with different wave bands, the wavelength range of the light beams which can be processed by the optical ring device is expanded, and then the single-fiber wavelength capacity of the optical module is expanded.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technology, and in particular to an optical module, an optical splitter / combiner, an optical connector, an optical component and a communication system. Background Art

[0002] The single-fiber optical module is an optical module with a single-fiber bidirectional optical interface. The single-fiber bidirectional optical interface is used to connect to a single optical fiber, and the single-fiber bidirectional optical module can send and receive light beams through the optical fiber. The single-fiber optical module can effectively save optical fiber resources.

[0003] Currently, how to improve the single-fiber wavelength capacity of a single-fiber optical module is a key technical issue. Summary of the invention

[0004] The present disclosure provides an optical module, an optical splitter and combiner, an optical connector, an optical component and a communication system. The present disclosure provides an optical module including a plurality of optical transmitting components, a plurality of optical receiving components and a splitter and combiner component, so that the input to the optical ring device is a plurality of narrow-band light beams, and the single-fiber bidirectional optical interface of the optical module transmits a wide-band light beam that is synthesized from the plurality of narrow-band light beams. In this way, by providing an optical ring device to process the plurality of light beams of different bands separately, the wavelength range of the light beams that can be processed by the optical ring device is expanded, thereby expanding the single-fiber wavelength capacity of the optical module. The technical solutions of the optical module, the optical splitter and combiner, the optical connector, the optical component and the communication system are as follows.

[0005] In the first aspect, the present disclosure provides an optical module. The optical module includes an electrical connection component, a plurality of optical transmitting components, a plurality of optical receiving components, an optical ring device, a splitter-combiner component, and a single-fiber bidirectional optical interface. The electrical connection component is electrically connected to the plurality of optical transmitting components and the plurality of optical receiving components, and is used to be electrically connected to a communication device. The plurality of optical transmitting components include a first optical transmitting component and a second optical transmitting component, and the plurality of optical receiving components include a first optical receiving component and a second optical receiving component. In the optical transmission direction, the first optical transmitting component is used to send a light beam T of a first band to the optical ring device. The second optical transmitting component is used to send a light beam T of a second band to the optical ring device. The optical ring device is used to send a light beam T of a first band and a light beam T of a second band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam T of a first band and the light beam T of a second band, and send the combined light beam through a single-fiber bidirectional optical interface. In the optical receiving direction, the splitter-combiner component is used to split the light beam received through the single-fiber bidirectional optical interface into a light beam R of a first band and a light beam R of a second band, and send the light beam R of a first band and a light beam R of a second band to the optical ring device. The optical ring device is used to send a light beam R of a first wavelength band to the first light receiving component, and send a light beam R of a second wavelength band to the second light receiving component.

[0006] The light beam T refers to the light beam sent by the optical transmitting component, and the light beam R refers to the light beam demultiplexed from the light beam received through the single-fiber bidirectional optical interface.

[0007] The optical ring device includes one or more optical circulators. In the light transmitting direction, the optical ring device is used to polarize and split each light beam T sent by the light transmitting component into two light beams with different polarization states, perform a first adjustment on the polarization directions of the two light beams with different polarization states, then combine the two adjusted light beams into light beam T, and send the combined light beam T to the splitter-combiner component. In the light receiving direction, the optical ring device is used to polarize and split each light beam R sent by the splitter-combiner component into two light beams with different polarization states, perform a second adjustment on the polarization directions of the two light beams with different polarization states, then combine the two adjusted light beams into light beam R, and send it to the corresponding light receiving component. The second adjustment is different from the first adjustment.

[0008] It can be seen from the above content that the light beam T sent by the optical emitting component is incident on the wave splitting and combining component after passing through the optical ring device, while the light beam R sent from the wave splitting and combining component will not be incident on the light emitting component after passing through the optical ring device, but will be incident on the light receiving component. That is, the optical ring device is an optical device with non-reciprocity, wherein non-reciprocity refers to the property that the light beam cannot return along the original path after passing through the optical system (i.e., the optical ring device) in one direction. The reason for the non-reciprocity is that the above-mentioned second adjustment is different from the first adjustment. The optical module provided in the present disclosure realizes the separation of the light beam T and the light beam R by adopting the optical ring device, and the light beam T and the light beam R can use the same wavelength band, which makes the single-fiber wavelength capacity of the optical module provided in the present disclosure have a higher expansion potential under the premise of a limited number of wavelength bands.

[0009] When the optical ring device adjusts the polarization direction of the light beam (first adjustment or second adjustment), it is achieved by applying a magnetic field on the transmission path of the light beam. Since different wavelengths of light have different sensitivities to magnetic fields, the wavelength range of a light beam incident to the optical ring device cannot be too wide, otherwise the optical ring device cannot effectively process light of certain wavelengths. For the convenience of subsequent description, the upper limit value of the wavelength range of a light beam incident to the optical ring device is called the upper limit wavelength range, and the single fiber wavelength capacity of the optical module in the related art does not exceed the upper limit wavelength range.

[0010] The technical solution provided by the present disclosure is that, in the light sending direction, the first light transmitting component and the second light transmitting component respectively send a light beam T of the first band and a light beam T of the second band to the optical ring device. After the optical ring device processes the light beam T of the first band and the light beam T of the second band, it sends it to the splitter-combiner component. The splitter-combiner component combines the light beam T of the first band and the light beam T of the second band, and sends the combined light beam through a single-fiber bidirectional optical interface. In the light receiving direction, the splitter-combiner component splits the received light beam into a light beam R of the first band and a light beam R of the second band, and sends the light beam R of the first band and the light beam R of the second band to the optical ring device. After the optical ring device processes the light beam R of the first band and the light beam R of the second band, it sends the light beam R of the first band to the first light receiving component, and sends the light beam R of the second band to the second light receiving component.

[0011] It can be seen from the above content that what is transmitted in the optical ring device of the optical module are two light beams, namely, the light beam of the first wavelength band and the light beam of the second wavelength band. The transmission paths of the two light beams are different. Therefore, the optical ring device can process the two light beams separately. For example, different magnetic fields are applied to the transmission paths of the light beam of the first wavelength band and the light beam of the second wavelength band. In this way, although the wavelength ranges of the light beam of the first wavelength band and the light beam of the second wavelength band respectively still cannot exceed the upper wavelength range, the wavelength range of the light beam combined by the light beam of the first wavelength band and the light beam of the second wavelength band, that is, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface, can exceed the upper wavelength range. The present disclosure expands the wavelength range of the light beam that can be processed by the optical ring device by setting an optical ring device to process multiple light beams of different wavelength bands separately, thereby expanding the single-fiber wavelength capacity of the optical module.

[0012] In a possible implementation, the wavelength range of the first wavelength band and the wavelength range of the second wavelength band are both less than 170 nm.

[0013] In a possible implementation manner, the wavelength range of the first wavelength band and the wavelength range of the second wavelength band both cover at most eight coarse wavelength division multiplexer (CWDM) bands.

[0014] In a possible implementation manner, the wavelength range of the first wavelength band and the wavelength range of the second wavelength band both cover four CWDM bands.

[0015] The technical solution provided by the present disclosure sets the wavelength range of the first band and the wavelength range of the second band to be less than 170nm or to cover up to eight CWDM bands, so that the wavelength range of the first band and the wavelength range of the second band are both narrow (not exceeding the upper limit wavelength range), and the optical ring device can effectively process the light beam of the first band and the light beam of the second band.

[0016] In a possible implementation, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface is greater than 200 nm.

[0017] In a possible implementation, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface covers at least ten CWDM bands.

[0018] In a possible implementation, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface covers sixteen CWDM bands.

[0019] The technical solution provided by the present disclosure expands the single-fiber wavelength capacity of the optical module by setting the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface to be greater than 200 nm or to cover at least ten CWDM bands.

[0020] In a possible implementation, the optical transmission component includes a laser group and a combiner group. The laser group includes multiple lasers. The combiner group is used to combine the light beams sent by the multiple lasers into a light beam T, and send the light beam T to the optical ring device. Each laser is used to send a light beam, and the light beams sent by different lasers have different wavelengths. The light beam T is a light beam of a composite wavelength band, carrying multiple optical signals. The combiner group includes one or more combiners.

[0021] In a possible implementation, each laser is used to send a light beam in a CWDM band.

[0022] In one possible implementation, the laser group includes four lasers.

[0023] In a possible implementation, the light receiving assembly includes a detector group and a splitter group. The detector group includes multiple detectors. The splitter group is used to split a beam R sent by the optical ring device into multiple beams, and send the multiple beams to multiple detectors respectively.

[0024] In a possible implementation, each detector is used to receive a CWDM band light beam.

[0025] In a possible implementation, the detector group includes four detectors.

[0026] In a possible implementation, the optical ring device includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The working band of the first non-reciprocal polarization rotation part covers the first band, and is used to adjust the polarization direction of the light beam in the first band. The working band of the second non-reciprocal polarization rotation part covers the second band, and is used to adjust the polarization direction of the light beam in the second band.

[0027] The technical solution provided by the present disclosure, by arranging the light ring device to include a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part, enables the light ring device to effectively process both the light beam of the first wavelength band and the light beam of the second wavelength band.

[0028] In a possible implementation, the first non-reciprocal polarization rotation portion is located on the transmission path of the two polarization states of the light beam separated from the light beam of the first wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The second non-reciprocal polarization rotation portion is located on the transmission path of the two polarization states of the light beam separated from the light beam of the second wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The first adjustment and the second adjustment are different.

[0029] In a possible implementation manner, one of the first adjustment and the second adjustment is to rotate the polarization direction of the light beam by 90°, and the other is to keep the polarization direction of the light beam unchanged.

[0030] In a possible implementation, the first non-reciprocal polarization rotation part includes a half-wave plate and a first Faraday rotator. The second non-reciprocal polarization rotation part includes a half-wave plate and a second Faraday rotator. The magnetic field strengths of the first Faraday rotator and the second Faraday rotator are different. The half-wave plate is a reciprocal optical device, which can rotate the polarization direction of a light beam transmitted from any direction (i.e., light beam T and light beam R) by 45° along a first direction. The Faraday rotator is a non-reciprocal optical device, which can rotate the polarization direction of a light beam transmitted from one direction (one of the light beams T and light beam R) by 45° along a first direction, and rotate the polarization direction of a light beam transmitted from a second direction (the other light beam in the light beam T and light beam R) by 45° along a second direction.

[0031] In a possible implementation manner, the half-wave plate included in the first non-reciprocal polarization rotation portion and the half-wave plate included in the second non-reciprocal polarization rotation portion are the same half-wave plate.

[0032] In a possible implementation manner, the half-wave plate included in the first non-reciprocal polarization rotation portion and the half-wave plate included in the second non-reciprocal polarization rotation portion are different half-wave plates.

[0033] In a possible implementation, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface is greater than the wavelength range of the working band of the first non-reciprocal polarization rotation part, and greater than the wavelength range of the working band of the second non-reciprocal polarization rotation part.

[0034] In one possible implementation, the optical ring device includes a first optical circulator and a second optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part, and the second optical circulator includes a second non-reciprocal polarization rotation part. In the light transmitting direction, the first optical circulator is used to receive a light beam T of a first band from the first optical transmitting component, and send the light beam T of the first band to the splitter-combiner component. The second optical circulator is used to receive a light beam T of a second band from the second optical transmitting component, and send the light beam T of the second band to the splitter-combiner component. In the light receiving direction, the first optical circulator is used to receive a light beam R of a first band from the splitter-combiner component, and send the light beam R of the first band to the first optical receiving component. The second optical circulator is used to receive a light beam R of a second band from the splitter-combiner component, and send the light beam R of the second band to the second optical receiving component.

[0035] In a possible implementation, the optical ring device includes a first optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. In the light transmitting direction, the first optical circulator is used to receive a light beam T of a first band from a first optical transmitting component, receive a light beam T of a second band from a second optical transmitting component, and send the light beam T of the first band and the light beam T of the second band to a wave splitter / combiner component. In the light receiving direction, the first optical circulator is used to receive a light beam R of a first band and a light beam R of a second band from a wave splitter / combiner component, send the light beam R of the first band to a first optical receiving component, and send the light beam R of the second band to a second optical receiving component.

[0036] The technical solution provided by the present disclosure, by setting the first optical circulator to include the first non-reciprocal polarization rotation part and the second non-reciprocal polarization rotation part, enables one optical circulator to process two light beams of different wavelength bands respectively. In this way, the number of optical circulators required to be included in the optical module is reduced, and the volume and cost of the optical module are reduced.

[0037] In a possible implementation, the first optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitting and combining optical component, and a second polarization splitting and combining optical component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The first polarization splitting and combining optical component is located on an optical path between the first optical transmitting component, the second optical transmitting component, and the non-reciprocal polarization rotation component, and is located on an optical path between the first optical receiving component, the second optical receiving component, and the non-reciprocal polarization rotation component. The second polarization splitting and combining optical component is located on an optical path between the splitting and combining component and the non-reciprocal polarization rotation component.

[0038] The technical solution provided by the present disclosure is that the non-reciprocal polarization rotation component of the first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part, and the first polarization splitting and combining component can realize the splitting and combining of two light beams, and the second polarization splitting and combining component can realize the splitting and combining of two light beams. Compared with setting the first non-reciprocal polarization rotation part and the second non-reciprocal polarization rotation part in two optical circulators, the technical solution provided by the present disclosure only requires a first polarization splitting and combining component and a second polarization splitting and combining component to realize the splitting and combining of two light beams, realizes the multiplexing of polarization splitting and combining components, saves the number of polarization splitting and combining components, reduces costs, and also improves the integration density of optical devices.

[0039] In a possible implementation, the non-reciprocal polarization rotation component includes a half-wave plate, a first Faraday rotator, and a second Faraday rotator. The first Faraday rotator and a portion of the half-wave plate form a first non-reciprocal polarization rotation portion, and the second Faraday rotator and a portion of the half-wave plate form a second non-reciprocal polarization rotation portion.

[0040] In a possible implementation, the non-reciprocal polarization rotation component includes two first non-reciprocal polarization rotation parts and two second non-reciprocal polarization rotation parts. The first non-reciprocal polarization rotation parts and the second non-reciprocal polarization rotation parts are arranged alternately. The two first non-reciprocal polarization rotation parts are respectively used to receive light beams of two polarization states separated from the light beam of the first wavelength band, and the two second non-reciprocal polarization rotation parts are respectively used to receive light beams of two polarization states separated from the light beam of the second wavelength band.

[0041] In a possible implementation, the non-reciprocal polarization rotation component includes a half-wave plate, two first Faraday rotators, and two second Faraday rotators. The first Faraday rotator and the second Faraday rotator are arranged alternately. Each first Faraday rotator and a portion of the half-wave plate form a first non-reciprocal polarization rotation portion. Each second Faraday rotator and a portion of the half-wave plate form a second non-reciprocal polarization rotation portion.

[0042] In a possible implementation, in the light transmission direction, the first polarization splitter-combiner is used to polarization split the light beam T of the first band and the light beam T of the second band, send the two polarization states of the light beam T of the first band to the first non-reciprocal polarization rotation part, and send the two polarization states of the light beam T of the second band to the second non-reciprocal polarization rotation part. The second polarization splitter-combiner is used to combine the two polarization states of the light beam sent by the first non-reciprocal polarization rotation part into the light beam T of the first band, combine the two polarization states of the light beam sent by the second non-reciprocal polarization rotation part into the light beam T of the second band, and send the light beam T of the first band and the light beam T of the second band to the splitter-combiner. In the light receiving direction, the second polarization splitter-combiner is used to polarization split the light beam R of the first band and the light beam R of the second band, send the two polarization states of the light beam R of the first band to the first non-reciprocal polarization rotation part, and send the two polarization states of the light beam R of the second band to the second non-reciprocal polarization rotation part. The first polarization light splitting and combining component is used to combine the two polarization states of the light beams sent by the first non-reciprocal polarization rotation part into a light beam R of the first wavelength band, combine the two polarization states of the light beams sent by the second non-reciprocal polarization rotation part into a light beam R of the second wavelength band, send the light beam R of the first wavelength band to the first light receiving component, and send the light beam R of the second wavelength band to the second light receiving component. There are two first non-reciprocal polarization rotation parts and two second non-reciprocal polarization rotation parts.

[0043] In a possible implementation, the wave splitter / combiner component is integrated with the second polarization wave splitter / combiner component, so that the optical components in the optical module can be arranged more compactly.

[0044] In a possible implementation, the wave splitting and combining component includes a prism, a filter, and a reflective element. The prism is bonded to the second polarization splitting and combining component, the filter is located between the prism and the second polarization splitting and combining component, and the reflective element is plated on the prism. In the light sending direction, the filter is used to receive the light beam T of the first band from the second polarization splitting and combining component. The reflective element is used to receive the light beam T of the second band from the second polarization splitting and combining component, and reflect the light beam T of the second band to the filter. The filter is used to combine the light beam T of the first band and the light beam T of the second band. In the light receiving direction, the filter is used to split the received light beam into the light beam R of the first band and the light beam R of the second band, send the light beam R of the first band to the second polarization splitting and combining component, and send the light beam R of the second band to the reflective element. The reflective element is used to reflect the light beam R of the second band to the second polarization splitting and combining component.

[0045] In a possible implementation, the multiple optical transmitting components also include a third optical transmitting component. The multiple optical receiving components also include a third optical receiving component. The optical ring device also includes a third non-reciprocal polarization rotation part, the working band of the third non-reciprocal polarization rotation part covers the third band, and the third non-reciprocal polarization rotation part is used to adjust the polarization direction of the light beam in the third band. In the light transmitting direction, the third optical transmitting component is used to send a light beam T of the third band to the optical ring device. The optical ring device is also used to send a light beam T of the third band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band, and send the combined light beam to the outside through a single-fiber bidirectional optical interface. In the light receiving direction, the splitter-combiner component is used to split the light beam received through the single-fiber bidirectional optical interface into a light beam R of the first band, a light beam R of the second band, and a light beam R of the third band, and send the light beam R of the first band, the light beam R of the second band, and the light beam R of the third band to the optical ring device. The optical ring device is also used to send a light beam R of a third wavelength band to the third light receiving component.

[0046] The technical solution provided by the present disclosure is to set the optical module to also include a third optical transmitting component and a third optical receiving component, and to set the optical ring device to also include a third non-reciprocal polarization rotation part, so that the optical ring device can process three light beams of different bands respectively. In addition, the light beam transmitted by the single-fiber bidirectional optical interface is a light beam of the first band, a light beam of the second band, and a light beam of the third band, thereby further expanding the single-fiber wavelength capacity of the optical module.

[0047] In a possible implementation, the wavelength range of the third band is less than 170 nm.

[0048] In a possible implementation, the wavelength range of the third band covers at most eight CWDM bands.

[0049] In a possible implementation, the wavelength range of the third band covers four CWDM bands.

[0050] In one possible implementation, the third non-reciprocal polarization rotation portion is located on the transmission path of the two polarization state light beams separated from the light beam of the third band, and is used to perform a first adjustment on the polarization directions of the two polarization state light beams separated from the light beam T, and to perform a second adjustment on the polarization directions of the two polarization state light beams separated from the light beam R.

[0051] In a possible implementation, the optical ring device includes a first optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part, and a third non-reciprocal polarization rotation part. In the light transmitting direction, the first optical circulator is used to receive a light beam T of a first band from the first optical transmitting component, receive a light beam T of a second band from the second optical transmitting component, receive a light beam T of a third band from the third optical transmitting component, and send the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band to the wave splitter and combiner component. In the light receiving direction, the first optical circulator is used to receive a light beam R of a first band, a light beam R of a second band, and a light beam R of a third band from the wave splitter and combiner component, send the light beam R of the first band to the first optical receiving component, send the light beam R of the second band to the second optical receiving component, and send the light beam R of the third band to the third optical receiving component.

[0052] The technical solution provided by the present disclosure is that the first optical circulator includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part and a third non-reciprocal polarization rotation part, so that one optical circulator can process three light beams of different wavelength bands respectively. In this way, the number of optical circulators required to be included in the optical module is reduced, and the volume and cost of the optical module are reduced.

[0053] In a possible implementation, the first optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitting and combining optical component, and a second polarization splitting and combining optical component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part, and a third non-reciprocal polarization rotation part. The first polarization splitting and combining optical component is located on an optical path between the first optical transmitting component, the second optical transmitting component, the third optical transmitting component, and the non-reciprocal polarization rotation component, and is located on an optical path between the first optical receiving component, the second optical receiving component, the third optical receiving component, and the non-reciprocal polarization rotation component. The second polarization splitting and combining optical component is located on an optical path between the splitting and combining component and the non-reciprocal polarization rotation component.

[0054] The technical solution provided by the present disclosure is that the non-reciprocal polarization rotation component of the first optical circulator includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part and a third non-reciprocal polarization rotation part, and the first polarization splitting and combining component can realize the splitting and combining of three light beams, and the second polarization splitting and combining component can realize the splitting and combining of three light beams. Compared with setting the first non-reciprocal polarization rotation part, the second non-reciprocal polarization rotation part and the third non-reciprocal polarization rotation part in three optical circulators, the technical solution provided by the present disclosure only requires a first polarization splitting and combining component and a second polarization splitting and combining component to realize the splitting and combining of three light beams, realizes the multiplexing of polarization splitting and combining components, saves the number of polarization splitting and combining components, reduces costs, and also improves the integration density of optical devices.

[0055] In a possible implementation, the non-reciprocal polarization rotation component includes a half-wave plate, a first Faraday rotator, a second Faraday rotator, and a third Faraday rotator. The first Faraday rotator and a portion of the half-wave plate form a first non-reciprocal polarization rotation portion, the second Faraday rotator and a portion of the half-wave plate form a second non-reciprocal polarization rotation portion, and the third Faraday rotator and a portion of the half-wave plate form a third non-reciprocal polarization rotation portion.

[0056] In a possible implementation, the first optical circulator includes two first non-reciprocal polarization rotation parts, two second non-reciprocal polarization rotation parts, and two third non-reciprocal polarization rotation parts. The two first non-reciprocal polarization rotation parts are respectively used to receive light beams of two polarization states separated from a light beam of the first wavelength band, the two second non-reciprocal polarization rotation parts are respectively used to receive light beams of two polarization states separated from a light beam of the second wavelength band, and the two third non-reciprocal polarization rotation parts are respectively used to receive light beams of two polarization states separated from a light beam of the third wavelength band.

[0057] In a possible implementation, in the light transmission direction, the first polarization light splitting / combining component is used to polarization-split the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band, and sends the two polarization state light beams separated from the light beam T of the first band to the first non-reciprocal polarization rotation part, sends the two polarization state light beams separated from the light beam T of the second band to the second non-reciprocal polarization rotation part, and sends the two polarization state light beams separated from the light beam T of the third band to the third non-reciprocal polarization rotation part. The second polarization light splitting / combining component is used to combine the two polarization state light beams sent by the first non-reciprocal polarization rotation part into the light beam T of the first band, combine the two polarization state light beams sent by the second non-reciprocal polarization rotation part into the light beam T of the second band, combine the two polarization state light beams sent by the third non-reciprocal polarization rotation part into the light beam T of the third band, and send the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band to the splitting / combining component. In the light receiving direction, the second polarization light splitting and combining component is used to polarization split the light beam R of the first band, the light beam R of the second band and the light beam R of the third band, send the two polarization state light beams separated from the light beam R of the first band to the first non-reciprocal polarization rotation part, send the two polarization state light beams separated from the light beam R of the second band to the second non-reciprocal polarization rotation part, and send the two polarization state light beams separated from the light beam R of the third band to the third non-reciprocal polarization rotation part. The first polarization light splitting and combining component is used to combine the two polarization state light beams sent by the first non-reciprocal polarization rotation part into the light beam R of the first band, combine the two polarization state light beams sent by the second non-reciprocal polarization rotation part into the light beam R of the second band, combine the two polarization state light beams sent by the third non-reciprocal polarization rotation part into the light beam R of the third band, send the light beam R of the first band to the first light receiving component, send the light beam R of the second band to the second light receiving component, and send the light beam R of the third band to the third light receiving component.

[0058] In a possible implementation, the multiple optical transmitting components also include a fourth optical transmitting component. The multiple optical receiving components also include a fourth optical receiving component. The optical ring device also includes a fourth non-reciprocal polarization rotation part, the working band of the fourth non-reciprocal polarization rotation part covers the fourth band, and the fourth non-reciprocal polarization rotation part is used to adjust the polarization direction of the light beam in the fourth band. In the light sending direction, the fourth optical transmitting component is used to send a light beam T of the fourth band to the optical ring device. The optical ring device is also used to send a light beam T of the fourth band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam T of the first band, the light beam T of the second band, the light beam T of the third band and the light beam T of the fourth band, and send the combined light beam to the outside through a single-fiber bidirectional optical interface. In the light receiving direction, the wave splitter / combiner assembly is used to split the light beam received through the single-fiber bidirectional optical interface into a light beam R of a first wavelength band, a light beam R of a second wavelength band, a light beam R of a third wavelength band, and a light beam R of a fourth wavelength band, and send the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band, and the light beam R of the fourth wavelength band to the optical ring device. The optical ring device is also used to send the light beam R of the fourth wavelength band to the fourth optical receiving assembly.

[0059] The technical solution provided by the present disclosure is to set the optical module to also include a fourth optical transmitting component and a fourth optical receiving component, and to set the optical ring device to also include a fourth non-reciprocal polarization rotation part, so that the optical ring device can process four light beams of different bands respectively. In addition, the light beam transmitted by the single-fiber bidirectional optical interface is a light beam of the first band, a light beam of the second band, a light beam of the third band, and a light beam of the fourth band, so that the single-fiber wavelength capacity of the optical module can be further expanded.

[0060] In a possible implementation, the wavelength range of the fourth band is less than 170 nm.

[0061] In a possible implementation, the wavelength range of the fourth band covers at most eight CWDM bands.

[0062] In a possible implementation, the wavelength range of the fourth band covers four CWDM bands.

[0063] In one possible implementation, the fourth non-reciprocal polarization rotation portion is located on the transmission path of the two polarization state light beams separated from the light beam of the fourth band, and is used to perform a first adjustment on the polarization directions of the two polarization state light beams separated from the light beam T, and to perform a second adjustment on the polarization directions of the two polarization state light beams separated from the light beam R.

[0064] In a possible implementation, the optical ring device includes a first optical circulator and a second optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The second optical circulator includes a third non-reciprocal polarization rotation part and a fourth non-reciprocal polarization rotation part. In the light transmitting direction, the first optical circulator is used to receive a light beam T of a first band from the first optical transmitting component, receive a light beam T of a second band from the second optical transmitting component, and send a light beam T of a first band and a light beam T of a second band to the splitter-combiner component. The second optical circulator is used to receive a light beam T of a third band from the third optical transmitting component, receive a light beam T of a fourth band from the fourth optical transmitting component, and send a light beam T of a third band and a light beam T of a fourth band to the splitter-combiner component. In the light receiving direction, the first optical circulator is used to receive a light beam R of a first band and a light beam R of a second band from the splitter-combiner component, send a light beam R of a first band to the first optical receiving component, and send a light beam R of a second band to the second optical receiving component. The second optical circulator is used to receive the light beam R of the third band and the light beam R of the fourth band from the wave splitter / combiner component, send the light beam R of the third band to the third optical receiving component, and send the light beam R of the fourth band to the fourth optical receiving component.

[0065] The technical solution provided by the present disclosure, by setting the first optical circulator to include the first non-reciprocal polarization rotation part and the second non-reciprocal polarization rotation part, and setting the second optical circulator to include the third non-reciprocal polarization rotation part and the fourth non-reciprocal polarization rotation part, can realize the processing of four light beams through two optical circulators, reduce the number of optical circulators in the optical module, and save costs.

[0066] In a possible implementation, the wave splitting and combining component includes a first wave splitting and combining component and a second wave splitting and combining component, and there are two first wave splitting and combining components. In the light sending direction, one first wave splitting and combining component is used to combine the light beam T of the first band and the light beam T of the second band sent by the first optical circulator. Another first wave splitting and combining component is used to combine the light beam T of the third band and the light beam T of the fourth band sent by the second optical circulator. The second wave splitting and combining component is used to combine the light beams sent by the two first wave splitting and combining components, and send the combined light beam through a single-fiber bidirectional optical interface. In the light receiving direction, the second wave splitting and combining component is used to split the light beam received through the single-fiber bidirectional optical interface into two light beams, and send the two light beams to the two first wave splitting and combining components respectively. A first wave splitting and combining component is used to split the received light beam into a light beam R of the first band and a light beam R of the second band, and send the light beam R of the first band and the light beam R of the second band to the first optical circulator. Another first splitter / combiner component is used to split the received light beam into a light beam R of a third wavelength band and a light beam R of a fourth wavelength band, and send the light beam R of the third wavelength band and the light beam R of the fourth wavelength band to the second optical circulator.

[0067] In a possible implementation manner, the two first wave splitter / combiner components are respectively integrated with the first optical circulator and the second optical circulator.

[0068] In a possible implementation, the optical module further includes a mode filter. The mode filter is located on the optical path between the wave splitter / combiner component and the single-fiber bidirectional optical interface, and is used to filter the reflected light beam reflected back from the transmitted light beam.

[0069] The technical solution provided by the present disclosure is that when the light beam sent out by the wave splitter and combiner is transmitted to the connection between the single-fiber bidirectional optical interface and the optical fiber, part of the light beam will be reflected back by the end face of the optical fiber to form a reflected light beam. Since the receiving light beam and the transmitting light beam of the optical module use the same wavelength band, the reflected light beam will be incident on the corresponding optical receiving component together with the receiving light beam, that is, the reflected light beam will interfere with the receiving light beam. By setting a mode filter to filter the reflected light beam, the interference of the reflected light beam on the receiving light beam is reduced, and the reliability of the optical module receiving the optical signal is improved.

[0070] In a possible implementation, the electrical connection assembly includes a plurality of gold finger connectors. The plurality of gold finger connectors are respectively used to dock with a plurality of female connectors in the communication device. Among them, after the single-fiber wavelength capacity of the optical module is expanded, a larger number of optical signals can be transmitted through a single-fiber bidirectional optical interface, and the optical module also needs to be able to transmit a larger number of electrical signals.

[0071] The technical solution provided by the present disclosure increases the number of electrical signals that can be transmitted by the optical module by setting the electrical connection component of the optical module to include multiple gold finger connectors, so that the electrical connection component of the optical module can support a single-fiber bidirectional optical interface to transmit a larger number of optical signals.

[0072] In a possible implementation, each of the multiple gold finger connectors is electrically connected to a light emitting component and a light receiving component. That is, one light beam R and one light beam T correspond to one gold finger connector. In this way, it is convenient to uniformly control multiple lasers in each light emitting component and multiple detectors in each light receiving component.

[0073] In a possible implementation, there are two gold finger connectors, and the two gold finger connectors are arranged horizontally or vertically.

[0074] In a possible implementation, there are three gold finger connectors, and the three gold finger connectors are arranged horizontally or vertically.

[0075] In a possible implementation, there are four gold finger connectors, and the four gold finger connectors are arranged horizontally or two horizontally and two vertically.

[0076] In a possible implementation, the optical module includes an optical interface portion and a plurality of electrical plug-in portions. The optical interface portion has a single-fiber bidirectional optical interface. A plurality of gold finger connectors are respectively located at the plurality of electrical plug-in portions. The plurality of electrical plug-in portions are arranged at intervals, and each electrical plug-in portion is used to be inserted into a port of an optical cage of a communication device.

[0077] The technical solution provided by the present disclosure, by providing an optical module with a plurality of spaced electrical plug-in parts, and each electrical plug-in part is used to be inserted into a port of an optical cage of a communication device, so that the optical module provided by the present disclosure can be applied to existing communication devices, thereby reducing the application cost. In addition, the volume of the optical module including the plurality of electrical plug-in parts becomes larger, so that the optical module can accommodate the newly added optical devices and electrical devices due to the expansion of the single-fiber wavelength capacity.

[0078] In a possible implementation, each electrical plug-in portion includes a light emitting component and a light receiving component.

[0079] In a possible implementation, there are two electrical plug-in parts, which are arranged transversely, and are used to be inserted into two transverse rows of ports of the optical cage.

[0080] In a possible implementation, there are two electrical plug-in parts, which are arranged longitudinally, and are used to be inserted into two longitudinally arranged ports of the optical cage.

[0081] In a possible implementation, there are three electrical plug-in parts, which are arranged horizontally, and are used to be inserted into three horizontally arranged ports of the optical cage.

[0082] In a possible implementation, there are three electrical plug connectors, which are arranged longitudinally, and are used to be inserted into three longitudinally arranged ports of the optical cage.

[0083] In a possible implementation, there are four electrical plug-in parts, which are arranged horizontally, and are used to be inserted into four horizontally arranged ports of the optical cage.

[0084] In a possible implementation, there are four electrical plug-in parts, which are arranged in two horizontal and two vertical directions. The four electrical plug-in parts are used to be inserted into two ports of the optical cage, two horizontal and two vertical directions.

[0085] In a possible implementation, the shape of the electrical plug part is consistent with the shape of the electrical plug part of the optical module packaged in a quad small form factor pluggable (QSFP), or described as the electrical plug part being able to be inserted into a port of an optical cage that meets the QSFP packaging requirements. The QSFP packaged optical module is capable of transmitting four transmission electrical signals and four reception electrical signals.

[0086] In a possible implementation, there are two electrical plug-in parts, and the optical module can realize the transmission of eight-way transmission electrical signals and eight-way reception electrical signals.

[0087] In a possible implementation, there are three electrical plug-in parts, and the optical module can realize the transmission of twelve transmission electrical signals and twelve reception electrical signals.

[0088] In a possible implementation, there are four electrical plug-in parts, and the optical module can realize the transmission of sixteen transmission electrical signals and sixteen reception electrical signals.

[0089] In a possible implementation, the above-mentioned multiple electrical plug-in parts are integrated together. Alternatively, the optical module includes an optical interface part and an electrical plug-in part, and multiple gold finger connectors are located in the electrical plug-in part. In this way, the optical module has better integrity and higher integration.

[0090] In a possible implementation, the electrical plug is used to be inserted into a combined port of the optical cage. The combined port refers to a port formed by connecting at least two ports after removing at least one partition in the optical cage. In this way, the required improvements of the communication equipment can be reduced, and the application cost of the optical module can be reduced.

[0091] In a possible implementation, the combined port is a port formed by removing the middle vertical partition from two horizontal rows of ports. The two gold finger connectors in the electrical plug part are arranged horizontally to connect with the female connectors in the two horizontal rows of ports.

[0092] In a possible implementation, the combined port is a port formed by removing the middle transverse partition from two vertical rows of ports. The two gold finger connectors in the electrical plug part are arranged vertically to connect with the female connectors in the two vertical rows of ports.

[0093] In a possible implementation, the combined port is a port formed by removing two middle vertical partitions from three horizontal rows of ports. The three gold finger connectors in the electrical plug part are arranged horizontally to connect with the female connectors in the three horizontal rows of ports.

[0094] In a possible implementation, the combined port is a port formed by removing two horizontal partitions in the middle of three vertical rows of ports. The three gold finger connectors in the electrical plug part are arranged vertically to connect with the female connectors in the three vertical rows of ports.

[0095] In a possible implementation, the combined port is formed by removing three vertical partitions from four horizontal rows of ports. The four gold finger connectors in the electrical plug part are arranged horizontally to connect with the female connectors in the four horizontal rows of ports.

[0096] In a possible implementation, the combined port is formed by removing the intersecting horizontal partitions and vertical partitions from the four ports of two horizontal and two vertical. The four gold finger connectors in the electrical plug part are arranged two horizontally and two vertically to connect with the female connectors in the four ports of two horizontal and two vertical.

[0097] In one possible implementation, the optical module adopts a C-type pluggable (CFP) package or a CFP2 package. The electrical connection component includes a gold finger connector, which has at least one row of functional signal pins and two rows of high-speed signal pins. The two rows of high-speed signal pins are used to transmit electrical signals to multiple optical transmitting components, and to transmit received electrical signals generated by multiple optical receiving components to communication equipment. Among them, the optical module adopts a CFP package or a CFP2 package, which means that the outer dimensions of the optical module meet the standards of the CFP package or the CFP2 package, and the pins of the gold finger connector of the optical module may not meet the existing CFP package or CFP2 package standards.

[0098] The technical solution provided by the present disclosure, on the one hand, since the volume of the optical module in the CFP or CFP2 package form is relatively large, the overall form of these two types of optical modules does not need to be changed, and the newly added optical devices and electrical devices can be accommodated. Therefore, the optical module provided by the present disclosure can still be inserted into the port of the optical cage that meets the CFP or CFP2 standard.

[0099] On the other hand, since the gold finger connector of the existing CFP and CFP2 packaged optical modules only has one row of high-speed signal pins, it can only transmit four or eight electrical signals. Therefore, by setting the gold finger connector with two rows of high-speed signal pins, the number of electrical signals that can be transmitted by the optical module is increased, so that the electrical connection component of the optical module can support the expansion of the single-fiber wavelength capacity.

[0100] In a possible implementation, the functional signal pins and the high-speed signal pins are located on different surfaces of the gold finger connector, and two rows of high-speed signal pins are arranged in sequence along the docking direction of the gold finger connector.

[0101] In a possible implementation, two rows of high-speed signal pins are used to transmit sixteen transmission electrical signals to multiple optical transmitting components, and are used to transmit sixteen reception electrical signals generated by multiple optical receiving components to a communication device.

[0102] In a possible implementation, the optical module adopts CFP or CFP2 packaging. The electrical connection component includes two gold finger connectors, and the two gold finger connectors are located in the same electrical interface of the optical module. Exemplarily, the two gold finger connectors are arranged along the thickness direction of the optical module.

[0103] The technical solution provided by the present disclosure, on the one hand, since the volume of the optical module in the CFP or CFP2 package form is relatively large, the overall form of these two types of optical modules does not need to be changed, and the newly added optical devices and electrical devices can be accommodated. Therefore, the optical module provided by the present disclosure can still be inserted into the port of the optical cage that meets the CFP or CFP2 standard.

[0104] On the other hand, since the gold finger connector of the existing CFP and CFP2 packaged optical modules only has one row of gold fingers, it can only transmit four or eight electrical signals. Therefore, by setting the optical module with two gold finger connectors, the number of electrical signals that the optical module can transmit is increased, so that the electrical connection component of the optical module can support the expansion of the single-fiber wavelength capacity.

[0105] In a second aspect, the present disclosure provides an optical connector. The optical connector includes a plurality of optical input components, a plurality of optical output components, a connector body, and an optical bidirectional transmission component. The connector body has an optical ring device and a wave splitter / combiner component inside. The plurality of optical input components include a first optical input component and a second optical input component. The plurality of optical output components include a first optical output component and a second optical output component. In the first transmission direction of light, the first optical input component is used to send the received light beam T of the first wavelength band to the optical ring device. The second optical input component is used to send the received light beam T of the second wavelength band to the optical ring device. The optical ring device is used to send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the wave splitter / combiner component. The wave splitter / combiner component is used to combine the light beam T of the first wavelength band and the light beam T of the second wavelength band, and send the combined light beam through the optical bidirectional transmission component. In the second transmission direction of light, the wave splitter / combiner component is used to split the light beam received through the optical bidirectional transmission component into a light beam R of the first wavelength band and a light beam R of the second wavelength band, and send the light beam R of the first wavelength band and the light beam R of the second wavelength band to the optical ring device. The optical ring device is used to send a light beam R of a first wavelength band through a first light output component, and to send a light beam R of a second wavelength band through a second light output component.

[0106] Wherein, exemplarily, the optical input component of the optical connector is used to dock with the optical transmission port of the third optical module, and the optical output component is used to dock with the optical receiving port of the third optical module, and the third optical module is different from the optical module of the first aspect. In the first transmission direction of light, the first optical input component receives the light beam T of the first band sent by the third optical module, and sends the light beam T of the first band to the optical ring device. The second optical input component receives the light beam T of the second band sent by the third optical module, and sends the light beam T of the second band to the optical ring device. The optical ring device processes the light beam T of the first band and the light beam T of the second band respectively, and then sends them to the splitter-combiner component. The splitter-combiner component combines the light beam T of the first band and the light beam T of the second band, and sends the combined light beam through the optical bidirectional transmission component. In the second transmission direction of light, the splitter-combiner component splits the light beam received through the optical bidirectional transmission component into the light beam R of the first band and the light beam R of the second band, and sends the light beam R of the first band and the light beam R of the second band to the optical ring device. The optical ring device processes the light beam R of the first band and the light beam R of the second band respectively, sends the light beam R of the first band to the third optical module through the first light output component, and sends the light beam R of the second band to the third optical module through the second light output component.

[0107] The technical solution provided by the present disclosure is that the optical connector can convert at least the four optical ports of the two third optical modules into an optical bidirectional transmission component, thereby realizing the single-fiber transmission of multiple-channel transmission optical signals and multiple-channel reception optical signals, saving optical fiber resources. In addition, the optical ring device of the optical connector transmits two light beams, namely, the light beam of the first wavelength band and the light beam of the second wavelength band. The transmission paths of the two light beams are different. Therefore, the optical ring device can process the two light beams separately, for example, applying different magnetic fields on the transmission paths of the light beam of the first wavelength band and the light beam of the second wavelength band. In this way, although the wavelength ranges of the light beam of the first wavelength band and the light beam of the second wavelength band respectively still cannot exceed the upper wavelength range of the optical ring device, the wavelength range of the light beam combined by the light beam of the first wavelength band and the light beam of the second wavelength band, that is, the wavelength range of the light beam transmitted by the optical bidirectional transmission component, can exceed the upper wavelength range. It can be seen that the present disclosure expands the wavelength range of the light beam that can be processed by the optical ring device by setting the optical ring device to process multiple light beams of different wavelength bands separately, thereby expanding the single-fiber wavelength capacity of the optical connector.

[0108] In a possible implementation manner, the wavelength range of the first wavelength band and the wavelength range of the second wavelength band are the same as the wavelength range of the first wavelength band and the wavelength range of the second wavelength band of the optical module of the first aspect.

[0109] In a possible implementation manner, the wavelength range of the light beam transmitted by the optical bidirectional transmission component is the same as the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface of the optical module of the first aspect.

[0110] In a possible implementation manner, the optical ring device of the optical connector has the same structure as the optical ring device of the optical module of the first aspect.

[0111] In one possible implementation, the optical ring device includes a first optical circulator and a second optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part, and the second optical circulator includes a second non-reciprocal polarization rotation part. In a first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band from a first optical input component, and send the light beam T of the first band to a splitter-combiner component. The second optical circulator is used to receive a light beam T of a second band from a second optical input component, and send the light beam T of the second band to the splitter-combiner component. In a second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band from the splitter-combiner component, and send the light beam R of the first band through the first optical output component. The second optical circulator is used to receive a light beam R of a second band from the splitter-combiner component, and send the light beam R of the second band through the second optical output component.

[0112] In a possible implementation, the optical ring device includes a first optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. In a first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band from a first optical input component, receive a light beam T of a second band from a second optical input component, and send the light beam T of the first band and the light beam T of the second band to a wave splitter / combiner component. In a second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band and a light beam R of a second band from a wave splitter / combiner component, send the light beam R of the first band through a first optical output component, and send the light beam R of the second band through a second optical output component.

[0113] In a possible implementation, the first optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitting and combining optical component, and a second polarization splitting and combining optical component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The first polarization splitting and combining optical component is located on an optical path between the first optical input component, the second optical input component, and the non-reciprocal polarization rotation component, and is located on an optical path between the first optical output component, the second optical output component, and the non-reciprocal polarization rotation component. The second polarization splitting and combining optical component is located on an optical path between the splitting and combining component and the non-reciprocal polarization rotation component.

[0114] In a possible implementation, in the first transmission direction of light, the first polarization splitter-combiner is used to polarization split the light beam T of the first band and the light beam T of the second band, send the two polarization states of the light beam T split from the first band to the first non-reciprocal polarization rotation part, and send the two polarization states of the light beam T split from the second band to the second non-reciprocal polarization rotation part. The second polarization splitter-combiner is used to combine the two polarization states of the light beam sent by the first non-reciprocal polarization rotation part into the light beam T of the first band, combine the two polarization states of the light beam sent by the second non-reciprocal polarization rotation part into the light beam T of the second band, and send the light beam T of the first band and the light beam T of the second band to the splitter-combiner. In the second transmission direction of light, the second polarization splitter-combiner is used to polarization split the light beam R of the first band and the light beam R of the second band, send the two polarization states of the light beam R split from the first band to the first non-reciprocal polarization rotation part, and send the two polarization states of the light beam R split from the second band to the second non-reciprocal polarization rotation part. The first polarization splitter-combiner component is used to combine the two polarization state light beams sent by the first non-reciprocal polarization rotation part into a light beam R of a first band, and to combine the two polarization state light beams sent by the second non-reciprocal polarization rotation part into a light beam R of a second band, and to send the light beam R of the first band through the first light output component, and to send the light beam R of the second band through the second light output component.

[0115] In a possible implementation, the multiple light input components further include a third light input component. The multiple light output components further include a third light output component. The optical ring device further includes a third non-reciprocal polarization rotation part, the working band of the third non-reciprocal polarization rotation part covers the third band, and the third non-reciprocal polarization rotation part is used to adjust the polarization direction of the light beam of the third band. In the first transmission direction of light, the third light input component is used to send the received light beam T of the third band to the optical ring device. The optical ring device is also used to send the light beam T of the third band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band, and send the combined light beam to the outside through the optical bidirectional transmission component. In the second transmission direction of light, the splitter-combiner component is used to split the light beam received through the optical bidirectional transmission component into a light beam R of the first band, a light beam R of the second band, and a light beam R of the third band, and send the light beam R of the first band, the light beam R of the second band, and the light beam R of the third band to the optical ring device. The optical ring device is also used to send a light beam R in a third wavelength band through a third light output component.

[0116] In a possible implementation manner, the wavelength range of the third wavelength band is the same as the wavelength range of the third wavelength band of the optical module of the first aspect.

[0117] In one possible implementation, the optical ring device includes a first optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part, and a third non-reciprocal polarization rotation part. In a first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band from a first optical input component, receive a light beam T of a second band from a second optical input component, receive a light beam T of a third band from a third optical input component, and send the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band to a wave splitter / combiner component. In a second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band, a light beam R of a second band, and a light beam R of a third band from a wave splitter / combiner component, send the light beam R of the first band through a first optical output component, send the light beam R of the second band through a second optical output component, and send the light beam R of the third band through a third optical output component.

[0118] In a possible implementation, the first optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitting and combining optical component, and a second polarization splitting and combining optical component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part, and a third non-reciprocal polarization rotation part. The first polarization splitting and combining optical component is located on an optical path between the first optical input component, the second optical input component, the third optical input component, and the non-reciprocal polarization rotation component, and is located on an optical path between the first optical output component, the second optical output component, the third optical output component, and the non-reciprocal polarization rotation component. The second polarization splitting and combining optical component is located on an optical path between the splitting and combining optical component and the non-reciprocal polarization rotation component.

[0119] In a possible implementation, the multiple light input components further include a fourth light input component. The multiple light output components further include a fourth light output component. The optical ring device further includes a fourth non-reciprocal polarization rotation part, the working band of the fourth non-reciprocal polarization rotation part covers the fourth band, and the fourth non-reciprocal polarization rotation part is used to adjust the polarization direction of the light beam in the fourth band. In the first transmission direction of light, the fourth light input component is used to send the received light beam T of the fourth band to the optical ring device. The optical ring device is also used to send the light beam T of the fourth band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam T of the first band, the light beam T of the second band, the light beam T of the third band and the light beam T of the fourth band, and send the combined light beam to the outside through the optical bidirectional transmission component. In the second transmission direction of light, the wave splitter / combiner assembly is used to split the light beam received by the optical bidirectional transmission component into a light beam R of a first wavelength band, a light beam R of a second wavelength band, a light beam R of a third wavelength band and a light beam R of a fourth wavelength band, and send the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band and the light beam R of the fourth wavelength band to the optical ring device. The optical ring device is also used to send the light beam R of the fourth wavelength band through the fourth light output component.

[0120] In a possible implementation manner, the wavelength range of the fourth wavelength band is the same as the wavelength range of the fourth wavelength band of the optical module of the first aspect.

[0121] In a possible implementation, the optical ring device includes a first optical circulator and a second optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The second optical circulator includes a third non-reciprocal polarization rotation part and a fourth non-reciprocal polarization rotation part. In the first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band from the first optical input component, receive a light beam T of a second band from the second optical input component, and send the light beam T of the first band and the light beam T of the second band to the splitter-combiner component. The second optical circulator is used to receive a light beam T of a third band from the third optical input component, receive a light beam T of a fourth band from the fourth optical input component, and send the light beam T of the third band and the light beam T of the fourth band to the splitter-combiner component. In the second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band and a light beam R of a second band from the splitter-combiner component, send the light beam R of the first band through the first optical output component, and send the light beam R of the second band through the second optical output component. The second optical circulator is used to receive the light beam R of the third band and the light beam R of the fourth band from the wave splitter / combiner component, send the light beam R of the third band through the third light output component, and send the light beam R of the fourth band through the fourth light output component.

[0122] In a possible implementation, the optical connector further includes a mode filter, which is located on the optical path between the wave splitter / combiner assembly and the optical bidirectional transmission component, and is used to filter the reflected light beam reflected back from the transmitted light beam.

[0123] In a possible implementation, the optical input component and the optical output component are optical fiber connectors, and both are fixed to the connector body. In this way, the integrity of the optical connector is better. The optical input component is used to be inserted into the optical transmission port of the optical module, and the optical output component is used to be inserted into the optical receiving port of the optical module.

[0124] In a possible implementation, the optical input component and the optical output component are arranged in the form of an optical fiber connector pair, and each optical fiber connector pair includes an optical input component and an optical output component. In this way, it is convenient to connect the optical connector with the third optical module. The optical input component and the optical output component included in each optical fiber connector pair are used to be inserted into the optical transmission port and the optical receiving port of the same third optical module.

[0125] In a possible implementation, there are two optical fiber connector pairs, which are arranged horizontally. The two optical fiber connector pairs are used to connect with two third optical modules in a horizontal row.

[0126] In a possible implementation, there are two optical fiber connector pairs, which are arranged vertically. The two optical fiber connector pairs are used to connect with two third optical modules in the vertical row.

[0127] In a possible implementation, there are three optical fiber connector pairs, which are arranged horizontally. The three optical fiber connector pairs are used to connect with three third optical modules in a horizontal row.

[0128] In a possible implementation, there are three optical fiber connector pairs, which are arranged vertically, and are used to connect with three third optical modules in the vertical row.

[0129] In a possible implementation, there are four optical fiber connector pairs, which are arranged horizontally. The four optical fiber connector pairs are used to connect with four third optical modules in a horizontal row.

[0130] In a possible implementation, there are four optical fiber connector pairs, which are arranged two horizontally and two vertically. The four optical fiber connector pairs are used to connect with four third optical modules arranged two horizontally and two vertically.

[0131] In a possible implementation, the optical input component and the optical output component are optical fiber connectors, and both are connected to the connector body through a flexible optical cable.

[0132] The technical solution provided by the present invention is to set an optical input component and an optical output component to be connected to the connector body through a flexible optical cable, so that during the process of docking the optical fiber connector with the third optical module, the optical fiber connectors will not interfere with each other, thereby ensuring the smoothness of the docking of the optical fiber connector with the third optical module, and can reduce the manufacturing accuracy of the optical fiber connector, saving costs.

[0133] In a possible implementation, the first light input component and the first light output component are fixed together. The second light input component and the second light output component are fixed together. The third light input component and the third light output component are fixed together. The fourth light input component and the fourth light output component are fixed together.

[0134] In a possible implementation, the optical input component and the optical output component are optical fiber interfaces and are both located in the connector body. The optical input component and the optical output component are respectively connected to the optical transmission port and the optical receiving port of the third optical module through optical fiber jumpers.

[0135] In a possible implementation, the optical bidirectional transmission component is an optical fiber interface and is located in the connector body. The optical bidirectional transmission component is connected to the single-fiber bidirectional optical interface of the optical splitter / combiner device through an optical fiber.

[0136] In a possible implementation, the optical bidirectional transmission component is a fiber optic interface or a fiber optic connector, and is connected to the connector body through a flexible optical cable.

[0137] In a possible implementation, the optical connector further includes a distinguishing mark, which is used to distinguish the first optical input component from the second optical input component and to distinguish the first optical output component from the second optical output component. The distinguishing mark is a text mark, a color mark, a digital mark, etc.

[0138] The technical solution provided by the present disclosure, by setting distinguishing marks, enables the user to accurately connect the first optical input component and the first optical output component with the third optical module for transmitting and receiving light beams of the first band, and to connect the second optical input component and the second optical output component with the third optical module for transmitting and receiving light beams of the second band.

[0139] In a third aspect, the present disclosure provides an optical splitter and combiner. The optical splitter and combiner comprises an optical ring device, a splitter and combiner assembly, a single-fiber bidirectional optical interface, multiple optical input interfaces, multiple optical output interfaces, multiple combiner groups, and multiple splitter groups. The multiple optical input interfaces comprise multiple first optical input interfaces and multiple second optical input interfaces. The multiple optical output interfaces comprise multiple first optical output interfaces and multiple second optical output interfaces. The multiple combiner groups comprise a first combiner group and a second combiner group. The multiple splitter groups comprise a first splitter group and a second splitter group. In the first transmission direction of light, the splitter and combiner assembly is used to split the light beam received through the single-fiber bidirectional optical interface into a light beam T of a first band and a light beam T of a second band, and send the light beam T of the first band and the light beam T of the second band to the optical ring device. The optical ring device is used to send the light beam T of the first band to the first splitter group, and send the light beam T of the second band to the second splitter group. The first wave splitter group is used to split the light beam T of the first wavelength band into multiple light beams, and send the split multiple light beams through multiple first optical output interfaces. The second wave splitter group is used to split the light beam T of the second wavelength band into multiple light beams, and send the split multiple light beams through multiple second optical output interfaces. In the second transmission direction of light, the first wave combiner group is used to combine the multiple light beams received through multiple first optical input interfaces into the light beam R of the first wavelength band, and send the light beam R of the first wavelength band to the optical ring device. The second wave combiner group is used to combine the multiple light beams received through multiple second optical input interfaces into the light beam R of the second wavelength band, and send the light beam R of the second wavelength band to the optical ring device. The optical ring device is used to send the light beam R of the first wavelength band and the light beam R of the second wavelength band to the wave splitter-combiner assembly. The wave splitter-combiner assembly is used to combine the light beam R of the first wavelength band and the light beam R of the second wavelength band, and send the combined light beam through a single-fiber bidirectional optical interface.

[0140] Among them, exemplarily, the optical input interface of the optical splitter and combiner is used to connect to the optical transmitting port of the second optical module, the optical output interface is used to connect to the optical receiving port of the second optical module, and the single-fiber bidirectional optical interface is used to dock with the single-fiber bidirectional optical interface of the optical module (first optical module) of the first aspect. The second optical module and the first optical module are plugged into different communication devices. In the first transmission direction of light, the optical splitter and combiner is used to receive the light beam sent by the first optical module, and after splitting the light beam sent by the first optical module, send it to multiple second optical modules through multiple optical output interfaces. In the second transmission direction of light, the optical splitter and combiner is used to receive the light beams sent by multiple second optical modules through multiple optical input interfaces, combine the received multiple light beams, and send them to the first optical module through the single-fiber bidirectional optical interface.

[0141] As another example, the single-fiber bidirectional optical interface of the optical splitter / combiner is used to dock with the optical bidirectional transmission component of the optical connector of the second aspect. In the first transmission direction of light, the optical splitter / combiner is used to receive the light beam sent by the optical connector, split the light beam sent by the optical connector, and send it to multiple second optical modules through multiple optical output interfaces. In the second transmission direction of light, the optical splitter / combiner is used to receive the light beam sent by multiple second optical modules through multiple optical input interfaces, combine the received multiple light beams, and send them to the optical connector through the single-fiber bidirectional optical interface.

[0142] The technical solution provided by the present disclosure is that two light beams, namely, a light beam of a first wavelength band and a light beam of a second wavelength band, are transmitted in an optical ring device. The transmission paths of the two light beams are different. Therefore, the optical ring device can process the two light beams separately, for example, by applying different magnetic fields on the transmission paths of the light beam of the first wavelength band and the light beam of the second wavelength band. In this way, although the wavelength ranges of the light beam of the first wavelength band and the light beam of the second wavelength band respectively still cannot exceed the upper wavelength range, the wavelength range of the light beam combined by the light beam of the first wavelength band and the light beam of the second wavelength band, that is, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface, can exceed the upper wavelength range. It can be seen that the present disclosure expands the wavelength range of the light beam that can be processed by the optical ring device by setting an optical ring device to process multiple light beams of different wavelength bands separately, thereby expanding the single-fiber wavelength capacity of the optical splitter and combiner.

[0143] In a possible implementation manner, the wavelength range of the first wavelength band and the wavelength range of the second wavelength band are the same as the wavelength range of the first wavelength band and the wavelength range of the second wavelength band described in the optical module of the first aspect.

[0144] In a possible implementation, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface is the same as the wavelength range of the first wavelength band and the wavelength range of the second wavelength band described in the optical module of the first aspect.

[0145] In a possible implementation manner, the optical ring device included in the optical splitting and combining device has the same structure as the optical ring device included in the optical module of the first aspect.

[0146] In one possible implementation, the optical ring device includes a first optical circulator and a second optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part, and the second optical circulator includes a second non-reciprocal polarization rotation part. In a first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band from a splitter-combiner assembly, and send the light beam T of the first band to the first splitter group. The second optical circulator is used to receive a light beam T of a second band from the splitter-combiner assembly, and send the light beam T of the second band to the second splitter group. In a second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band from the first combiner group, and send the light beam R of the first band to the splitter-combiner assembly. The second optical circulator is used to receive a light beam R of a second band from the second combiner group, and send the light beam R of a second band to the splitter-combiner assembly.

[0147] In a possible implementation, the optical ring device includes a first optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. In a first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band and a light beam T of a second band from a splitter-combiner assembly, send the light beam T of the first band to the first splitter group, and send the light beam T of the second band to the second splitter group. In a second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band from the first combiner group, receive a light beam R of a second band from the second combiner group, and send the light beam R of the first band and the light beam R of the second band to the splitter-combiner assembly.

[0148] In a possible implementation, the first optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitter-combiner component, and a second polarization splitter-combiner component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The first polarization splitter-combiner component is located on an optical path between the splitter-combiner component and the non-reciprocal polarization rotation component. The second polarization splitter-combiner component is located on an optical path between the first splitter group, the second splitter group, and the non-reciprocal polarization rotation component, and is located on an optical path between the first combiner group, the second combiner group, and the non-reciprocal polarization rotation component.

[0149] In a possible implementation, in the first transmission direction of light, the first polarization light splitting / combining component is used to polarization-split the light beam T of the first band and the light beam T of the second band, send the two polarization states of the light beam T separated from the light beam T of the first band to the first non-reciprocal polarization rotation part, and send the two polarization states of the light beam T separated from the light beam T of the second band to the second non-reciprocal polarization rotation part. The second polarization light splitting / combining component is used to combine the two polarization states of the light beam sent by the first non-reciprocal polarization rotation part into the light beam T of the first band, combine the two polarization states of the light beam sent by the second non-reciprocal polarization rotation part into the light beam T of the second band, send the light beam T of the first band to the first splitter group, and send the light beam T of the second band to the second splitter group. In the second transmission direction of light, the second polarization light-splitting and combining component is used to polarization-split the light beam R of the first band and the light beam R of the second band, send the two polarization states of the light beam R separated from the light beam R of the first band to the first non-reciprocal polarization rotation part, and send the two polarization states of the light beam R separated from the light beam R of the second band to the second non-reciprocal polarization rotation part. The first polarization light-splitting and combining component is used to combine the two polarization states of the light beams sent by the first non-reciprocal polarization rotation part into the light beam R of the first band, combine the two polarization states of the light beams sent by the second non-reciprocal polarization rotation part into the light beam R of the second band, and send the light beam R of the first band and the light beam R of the second band to the light-splitting and combining component.

[0150] In a possible implementation, the wave splitter / combiner component is integrated with the first polarization wave splitter / combiner component.

[0151] In a possible implementation, the multiple optical input interfaces further include multiple third optical input interfaces. The multiple optical output interfaces further include multiple third optical output interfaces. The multiple combiner groups further include a third combiner group. The multiple splitter groups further include a third splitter group. The optical ring device further includes a third non-reciprocal polarization rotation part, the working band of the third non-reciprocal polarization rotation part covers the third band, and the third non-reciprocal polarization rotation part is used to adjust the polarization direction of the light beam in the third band. In the first transmission direction of light, the splitter-combiner component is used to split the light beam received through the single-fiber bidirectional optical interface into a light beam T of the first band, a light beam T of the second band, and a light beam T of the third band, and send the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band to the optical ring device. The optical ring device is also used to send the light beam T of the third band to the third splitter group. The third splitter group is used to split the light beam T of the third band into multiple light beams, and send the split multiple light beams through multiple third optical output interfaces. In the second transmission direction of light, the third combiner group is used to combine the multiple light beams received through the multiple third optical input interfaces into a light beam R of the third wavelength band, and send the light beam R of the third wavelength band to the optical ring device. The optical ring device is also used to send the light beam R of the third wavelength band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam R of the first wavelength band, the light beam R of the second wavelength band, and the light beam R of the third wavelength band, and send the combined light beam to the outside through the single-fiber bidirectional optical interface.

[0152] In a possible implementation manner, the wavelength range of the third wavelength band is the same as the wavelength range of the third wavelength band of the optical module of the first aspect.

[0153] In a possible implementation, the optical ring device includes a first optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part, and a third non-reciprocal polarization rotation part. In the first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band, a light beam T of a second band, and a light beam T of a third band from a splitter-combiner assembly, send the light beam T of the first band to the first splitter group, send the light beam T of the second band to the second splitter group, and send the light beam T of the third band to the third splitter group. In the second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band from the first combiner group, receive a light beam R of a second band from the second combiner group, receive a light beam R of a third band from the third combiner group, and send the light beam R of a first band, a light beam R of a second band, and a light beam R of a third band to the splitter-combiner assembly.

[0154] In a possible implementation, the first optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitter-combiner component, and a second polarization splitter-combiner component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part, a second non-reciprocal polarization rotation part, and a third non-reciprocal polarization rotation part. The first polarization splitter-combiner component is located on an optical path between the splitter-combiner component and the non-reciprocal polarization rotation component. The second polarization splitter-combiner component is located on an optical path between the first splitter group, the second splitter group, the third splitter group, and the non-reciprocal polarization rotation component, and is located on an optical path between the first combiner group, the second combiner group, the third combiner group, and the non-reciprocal polarization rotation component.

[0155] In a possible implementation, the multiple optical input interfaces further include multiple fourth optical input interfaces. The multiple optical output interfaces further include multiple fourth optical output interfaces. The multiple combiner groups further include a fourth combiner group. The multiple splitter groups further include a fourth splitter group. The optical ring device further includes a fourth non-reciprocal polarization rotation part, the working band of the fourth non-reciprocal polarization rotation part covers the fourth band, and the fourth non-reciprocal polarization rotation part is used to adjust the polarization direction of the light beam in the fourth band. In the first transmission direction of light, the splitter-combiner component is used to split the light beam received through the single-fiber bidirectional optical interface into a light beam T of the first band, a light beam T of the second band, a light beam T of the third band, and a light beam T of the fourth band, and send the light beam T of the first band, the light beam T of the second band, the light beam T of the third band, and the light beam T of the fourth band to the optical ring device. The optical ring device is also used to send the light beam T of the fourth band to the fourth splitter group. The fourth splitter group is used to split the light beam T of the fourth band into multiple light beams, and send the split multiple light beams through multiple fourth optical output interfaces. In the second transmission direction of light, the fourth combiner group is used to combine the multiple light beams received through the plurality of fourth optical input interfaces into a light beam R of a fourth wavelength band, and send the light beam R of the fourth wavelength band to the optical ring device. The optical ring device is also used to send the light beam R of the fourth wavelength band to the splitter-combiner component. The splitter-combiner component is used to combine the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band, and the light beam R of the fourth wavelength band, and send the combined light beam to the outside through the single-fiber bidirectional optical interface.

[0156] In a possible implementation manner, the wavelength range of the fourth wavelength band is the same as the wavelength range of the fourth wavelength band of the optical module of the first aspect.

[0157] In a possible implementation, the optical ring device includes a first optical circulator and a second optical circulator. The first optical circulator includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part. The second optical circulator includes a third non-reciprocal polarization rotation part and a fourth non-reciprocal polarization rotation part. In the first transmission direction of light, the first optical circulator is used to receive a light beam T of a first band and a light beam T of a second band from a splitter-combiner assembly, send the light beam T of the first band to the first splitter group, and send the light beam T of the second band to the second splitter group. The second optical circulator is used to receive a light beam T of a third band and a light beam T of a fourth band from the splitter-combiner assembly, send the light beam T of the third band to the third splitter group, and send the light beam T of the fourth band to the fourth splitter group. In the second transmission direction of light, the first optical circulator is used to receive a light beam R of a first band from the first combiner group, receive a light beam R of a second band from the second combiner group, and send the light beam R of a first band and a light beam R of a second band to the splitter-combiner assembly. The second optical circulator is used to receive the light beam R of the third band from the third combiner group, receive the light beam R of the fourth band from the fourth combiner group, and send the light beam R of the third band and the light beam R of the fourth band to the splitter-combiner assembly.

[0158] In a possible implementation, the optical splitter / combiner device further includes a mode filter. The mode filter is located on the optical path between the splitter / combiner assembly and the single-fiber bidirectional optical interface, and is used to filter the reflected light beam reflected from the transmitted light beam.

[0159] In a possible implementation, the optical splitter and combiner device further includes a power splitter, and there are multiple single-fiber bidirectional optical interfaces. The power splitter is located on the optical path between the splitter and combiner assembly and the single-fiber bidirectional optical interface, and the common end of the power splitter is connected to the splitter and combiner assembly, and multiple branch ends of the power splitter are respectively connected to multiple single-fiber bidirectional optical interfaces. The multiple light beams split by the power splitter have the same wavelength band and carry the same optical signal. Exemplarily, there are two single-fiber bidirectional optical interfaces.

[0160] The technical solution provided by the present disclosure is that the multiple single-fiber bidirectional optical interfaces of the optical splitter and combiner are respectively connected to the single-fiber bidirectional optical interfaces of the multiple optical modules of the first aspect through optical fibers, or are connected to the optical bidirectional transmission components of the multiple optical connectors of the second aspect. In this way, the optical splitter and combiner can send light beams to the optical modules or optical connectors through multiple optical fibers, realize the backup of optical signals, and realize dual uplink protection.

[0161] In a fourth aspect, the present disclosure provides an optical component. The optical component includes a light ring device. The light ring device is the light ring device of the first aspect, the second aspect, or the third aspect. The light ring device includes one or more light circulators.

[0162] In a possible implementation, the optical circulator includes a non-reciprocal polarization rotation component, a first polarization splitting and combining optical component, and a second polarization splitting and combining optical component. The non-reciprocal polarization rotation component is located on an optical path between the first polarization splitting and combining optical component and the second polarization splitting and combining optical component. The non-reciprocal polarization rotation component includes a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part, and the working band of the first non-reciprocal polarization rotation part and the working band of the second non-reciprocal polarization rotation part are different.

[0163] The technical solution provided by the present disclosure enables an optical circulator to process two light beams of different wavelength bands respectively by arranging a non-reciprocal polarization rotation component of the optical circulator including a first non-reciprocal polarization rotation part and a second non-reciprocal polarization rotation part.

[0164] Furthermore, the first polarization light splitting and combining component can realize the splitting and combining of two light beams, and the second polarization light splitting and combining component can realize the splitting and combining of two light beams. Compared with setting the first non-reciprocal polarization rotation part and the second non-reciprocal polarization rotation part in two optical circulators, the technical solution provided by the present disclosure only requires a first polarization light splitting and combining component and a second polarization light splitting and combining component to realize the splitting and combining of two light beams, realizes the multiplexing of polarization light splitting and combining components, saves the number of polarization light splitting and combining components, reduces costs, and also improves the integration density of optical devices.

[0165] In a possible implementation, the optical component further includes a wave splitter / combiner component, wherein the wave splitter / combiner component is the wave splitter / combiner component of the first aspect, the second aspect, or the third aspect.

[0166] In a possible implementation, the optical component further includes a wave splitter group and a wave combiner group, wherein the wave splitter group and the wave combiner group are the wave splitter group and the wave combiner group of the first aspect or the third aspect.

[0167] In a possible implementation, the optical component further includes a single-fiber bidirectional optical interface, wherein the single-fiber bidirectional optical interface is the single-fiber bidirectional optical interface of the first aspect or the third aspect.

[0168] In a possible implementation manner, the optical component further includes the optical bidirectional transmission component of the second aspect.

[0169] In a possible implementation manner, the optical component further includes a plurality of optical input interfaces and a plurality of optical output interfaces of the third aspect.

[0170] In a possible implementation manner, the optical component further includes a plurality of light input components and a plurality of light output components of the second aspect.

[0171] In a possible implementation, the optical component further includes a power divider, wherein the power divider is the power divider of the third aspect.

[0172] In a possible implementation, the optical component further includes a mode filter, wherein the mode filter is the mode filter of the first aspect, the second aspect, or the third aspect.

[0173] In a fifth aspect, the present disclosure provides a communication system. The communication system includes a first communication device, a first optical module, an optical splitter and combiner, a second communication device, and a second optical module. The first optical module is the optical module described in any one of the first aspect, and the optical splitter and combiner is the optical splitter and combiner described in any one of the third aspect. The first optical module is plugged into the first communication device, and the single-fiber bidirectional optical interface of the first optical module is connected to the single-fiber bidirectional optical interface of the optical splitter and combiner through an optical fiber. The second optical module is plugged into the second communication device, and the optical transmitting port of the second optical module is connected to the optical input interface of the optical splitter and combiner through an optical fiber, and the optical receiving port of the second optical module is connected to the optical output interface of the optical splitter and combiner through an optical fiber.

[0174] The technical solution provided by the present disclosure, by applying the optical module of the first aspect and the optical splitter / combiner of the third aspect in the communication system, makes the single-fiber wavelength capacity of the optical fiber between the optical module and the optical splitter / combiner larger, improves the communication capacity of the communication system, and saves optical fiber resources.

[0175] In a possible implementation, the optical splitter and combiner has multiple single-fiber bidirectional optical interfaces, and the multiple single-fiber bidirectional optical interfaces of the optical splitter and combiner are respectively connected to the single-fiber bidirectional optical interfaces of multiple first optical modules through multiple optical fibers. In this way, the optical splitter and combiner can send light beams to the first optical module through multiple optical fibers, thereby realizing backup of optical signals and dual uplink protection of optical signals.

[0176] In a sixth aspect, the present disclosure provides a communication system. The communication system includes a first communication device, a third optical module, an optical connector, an optical splitter and combiner, a second communication device, and a second optical module. The optical connector is the optical connector described in any one of the second aspect. The optical splitter and combiner is the optical splitter and combiner described in any one of the third aspect. The third optical module is plugged into the first communication device, the optical transmission port of the third optical module is connected to the optical input component of the optical connector, the optical receiving port of the third optical module is connected to the optical output component of the optical connector, and the optical bidirectional transmission component of the optical connector is connected to the single-fiber bidirectional optical interface of the optical splitter and combiner through an optical fiber. The second optical module is plugged into the second communication device, the optical transmission port of the second optical module is connected to the optical input interface of the optical splitter and combiner through an optical fiber, and the optical receiving port of the second optical module is connected to the optical output interface of the optical splitter and combiner through an optical fiber.

[0177] The technical solution provided by the present disclosure, by applying the optical connector of the second aspect and the optical splitter / combiner of the third aspect in the communication system, makes the single-fiber wavelength capacity of the optical fiber between the optical connector and the optical splitter / combiner larger, improves the communication capacity of the communication system, and saves optical fiber resources.

[0178] In a possible implementation, the optical splitter / combiner has multiple single-fiber bidirectional optical interfaces, and the multiple single-fiber bidirectional optical interfaces of the optical splitter / combiner are respectively connected to the optical bidirectional transmission components of multiple optical connectors through multiple optical fibers. In this way, the optical splitter / combiner can send light beams to the optical connectors through multiple optical fibers, thereby realizing backup of optical signals and dual uplink protection of optical signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0179] Figure 1 is a schematic diagram of a first communication system provided by an embodiment of the present disclosure;

[0180] Figure 2 It is a schematic diagram of a transmission optical path of an optical module in the related art;

[0181] Figure 3 It is a schematic diagram of a receiving optical path of an optical module in the related art;

[0182] Figure 4 is a schematic diagram of an optical module provided by an embodiment of the present disclosure;

[0183] Figure 5 is a schematic diagram of a light emitting assembly provided by an embodiment of the present disclosure;

[0184] Figure 6 is a schematic diagram of a laser group and a combiner group provided by an embodiment of the present disclosure;

[0185] Figure 7 is a schematic diagram of a light receiving component provided by an embodiment of the present disclosure;

[0186] Figure 8 is a schematic diagram of a detector group and a wave splitter group provided by an embodiment of the present disclosure;

[0187] Fig. 9 is a schematic diagram of an optical module including a plurality of non-reciprocal polarization rotation parts provided by an embodiment of the present disclosure;

[0188] Fig.10 is a schematic diagram of a first optical module including two optical transmitting components and two optical receiving components provided by an embodiment of the present disclosure;

[0189] Fig.11 This embodiment of the present disclosure provides a Fig.10 The schematic diagram of the transmission optical path of the optical module shown;

[0190] Fig.12 This embodiment of the present disclosure provides a Fig.10 A schematic diagram of a receiving optical path of an optical module is shown;

[0191] Fig.13 is a schematic diagram of a second optical module including two optical transmitting components and two optical receiving components provided by an embodiment of the present disclosure;

[0192] Fig.14 This embodiment of the present disclosure provides a Fig.14 The schematic diagram of the transmission optical path of the optical module shown;

[0193] Fig.15 This embodiment of the present disclosure provides a Fig.14 A schematic diagram of a receiving optical path of an optical module is shown;

[0194] Fig.16 is a schematic diagram of an optical circulator with two non-reciprocal polarization rotation parts provided by an embodiment of the present disclosure;

[0195] Fig.17 It is a schematic diagram of an integrated arrangement of an optical circulator and a wave splitter / combiner component provided in an embodiment of the present disclosure;

[0196] Fig.18 is a schematic diagram of an optical module including three optical transmitting components and three optical receiving components provided by an embodiment of the present disclosure;

[0197] Fig.19 This embodiment of the present disclosure provides a Fig.18 A schematic diagram of a transmission optical path of an optical module is shown;

[0198] Fig. 20 This embodiment of the present disclosure provides a Fig.18 A schematic diagram of a receiving optical path of an optical module is shown;

[0199] Fig.21 is a schematic diagram of an optical circulator with three non-reciprocal polarization rotation parts provided by an embodiment of the present disclosure;

[0200] Fig. 22 is a schematic diagram of an optical module including four optical transmitting components and four optical receiving components provided by an embodiment of the present disclosure;

[0201] Fig.23 This is the first embodiment provided by the present disclosure. Fig. 22 A schematic diagram of a transmission optical path of an optical module is shown;

[0202] Fig.24 This embodiment of the present disclosure provides a Fig. 22 A schematic diagram of a receiving optical path of an optical module is shown;

[0203] Fig.25 This is the second embodiment provided by the present disclosure. Fig. 22 A schematic diagram of a transmission optical path of an optical module is shown;

[0204] Fig.26 This is the third embodiment provided by the present disclosure. Fig. 22 A schematic diagram of a transmission optical path of an optical module is shown;

[0205] Fig. 27 is a schematic diagram of an optical module with a mode filter provided by an embodiment of the present disclosure;

[0206] Fig.28 is a schematic diagram of an optical module with multiple gold finger connectors provided by an embodiment of the present disclosure;

[0207] Fig.29 It is a schematic diagram of a first optical module with two electrical plug-in parts and two gold finger connectors provided by an embodiment of the present disclosure;

[0208] Fig.30 is a schematic diagram of a second optical module with two electrical plug-in parts and two gold finger connectors provided by an embodiment of the present disclosure;

[0209] Fig.31 is a schematic diagram of a first optical module with two horizontal rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0210] Fig.32 is a schematic diagram of a second optical module with two horizontal rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0211] Fig.33 is a schematic diagram of a first optical module with two vertical rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0212] Fig.34 is a schematic diagram of a second optical module with two vertical rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0213] Fig.35 It is a schematic diagram of a first optical module with an electrical plug-in portion and two gold finger connectors provided by an embodiment of the present disclosure;

[0214] Fig.36 is a schematic diagram of a second optical module having an electrical plug-in portion and two gold finger connectors provided by an embodiment of the present disclosure;

[0215] Fig.37 is a schematic diagram of an optical module having an electrical plug-in portion and two horizontal rows of gold finger connectors provided by an embodiment of the present disclosure;

[0216] Fig.38 is a schematic diagram of an optical module having an electrical plug-in portion and two vertical rows of gold finger connectors provided by an embodiment of the present disclosure;

[0217] Fig.39 is a schematic diagram of an optical module with three electrical plug-in parts and three gold finger connectors provided by an embodiment of the present disclosure;

[0218] Fig.40 is a schematic diagram of a first optical module with three horizontal rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0219] Fig.41 is a schematic diagram of a second optical module with three horizontal rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0220] Fig.42 is a schematic diagram of a first optical module with three vertical rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0221] Fig.43 is a schematic diagram of a second optical module with three vertical rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0222] Fig.44 is a schematic diagram of an optical module having an electrical plug-in portion and three gold finger connectors provided by an embodiment of the present disclosure;

[0223] Fig.45 is a schematic diagram of an optical module having an electrical plug-in portion and three horizontal rows of gold finger connectors provided by an embodiment of the present disclosure;

[0224] Fig.46 is a schematic diagram of an optical module having an electrical plug-in portion and three vertical rows of gold finger connectors provided by an embodiment of the present disclosure;

[0225] Fig.47 is a schematic diagram of an optical module with four electrical plug-in parts and four gold finger connectors provided by an embodiment of the present disclosure;

[0226] Fig.48 is a schematic diagram of a first optical module with four horizontal rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0227] Fig.49 is a schematic diagram of a second optical module with four horizontal rows of electrical plug-in parts provided by an embodiment of the present disclosure;

[0228] Fig.50 is a schematic diagram of a first optical module having two horizontal and two vertically arranged electrical plug-in parts provided by an embodiment of the present disclosure;

[0229] Fig.51is a schematic diagram of a second optical module having two horizontal and two vertically arranged electrical plug-in parts provided by an embodiment of the present disclosure;

[0230] Fig.52 is a schematic diagram of an optical module having an electrical plug-in portion and four gold finger connectors provided by an embodiment of the present disclosure;

[0231] Fig.53 is a schematic diagram of an optical module having an electrical plug-in portion and four horizontal rows of gold finger connectors provided by an embodiment of the present disclosure;

[0232] Fig.54 It is a schematic diagram of an optical module provided by an embodiment of the present disclosure having an electrical plug-in portion and two horizontal and two vertical gold finger connectors;

[0233] Fig.55 is a schematic diagram of an optical module with a gold finger connector provided by an embodiment of the present disclosure;

[0234] Fig.56 is a schematic diagram of an optical module using a CFP package provided by an embodiment of the present disclosure;

[0235] Fig.57 It is a schematic diagram of an optical module using a CFP package and having a gold finger connector with two rows of high-speed signal pins provided by an embodiment of the present disclosure;

[0236] Fig.58 is a schematic diagram of a single-row functional signal pin provided by an embodiment of the present disclosure;

[0237] Fig.59 is a schematic diagram of two rows of high-speed signal pins provided by an embodiment of the present disclosure;

[0238] Fig.60 is a schematic diagram of two rows of functional signal pins provided by an embodiment of the present disclosure;

[0239] Fig.61 is a schematic diagram of a first optical module with two gold finger connectors provided by an embodiment of the present disclosure;

[0240] Fig.62 is a schematic diagram of a second optical module with two gold finger connectors provided in an embodiment of the present disclosure;

[0241] Fig.63 is a schematic diagram of an optical module using a CFP package and having two gold finger connectors provided by an embodiment of the present disclosure;

[0242] Fig.64 is a schematic diagram of an optical splitter and combiner provided in an embodiment of the present disclosure;

[0243] Fig.65 is a schematic diagram of a first optical splitter / combiner device including two combiner groups and two splitter groups provided by an embodiment of the present disclosure;

[0244] Fig.66 is a schematic diagram of a second optical splitter / combiner device including two combiner groups and two splitter groups provided by an embodiment of the present disclosure;

[0245] Fig.67 This embodiment of the present disclosure provides a Fig.66 A schematic diagram showing an optical path of an optical splitter and combiner in a first transmission direction;

[0246] Fig.68 This embodiment of the present disclosure provides a Fig.66 A schematic diagram showing the optical path of the optical splitter / combiner in the second transmission direction;

[0247] Fig.69 is a schematic diagram of an optical splitter / combiner device including three combiner groups and three splitter groups provided by an embodiment of the present disclosure;

[0248] Fig.70 is a schematic diagram of an optical splitter / combiner device including four combiner groups and four splitter groups provided by an embodiment of the present disclosure;

[0249] Fig.71 is a schematic diagram of an optical splitter / combiner having two single-fiber bidirectional optical interfaces provided by an embodiment of the present disclosure;

[0250] Fig.72 is a schematic diagram of a second communication system provided by an embodiment of the present disclosure;

[0251] Fig.73 is a schematic diagram of a third communication system provided by an embodiment of the present disclosure;

[0252] Fig.74 is a schematic diagram of a fourth communication system provided by an embodiment of the present disclosure;

[0253] Fig.75 is a schematic diagram of an optical connector provided by an embodiment of the present disclosure;

[0254] Fig.76 is a schematic diagram of a first optical connector including two optical input components and two optical output components provided by an embodiment of the present disclosure;

[0255] Fig.77 is a schematic diagram of a second optical connector including two optical input components and two optical output components provided by an embodiment of the present disclosure;

[0256] Fig.78 This embodiment of the present disclosure provides a Fig.77A schematic diagram showing an optical path of an optical connector in a first transmission direction;

[0257] Fig.79 This embodiment of the present disclosure provides a Fig.77 A schematic diagram showing an optical path of the optical connector in a second transmission direction;

[0258] Fig.80 is a schematic diagram of a first optical connector having two horizontal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0259] Fig.81 is a schematic diagram of a second optical connector having two horizontal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0260] Fig.82 is a schematic diagram of a first optical connector having two longitudinal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0261] Fig.83 is a schematic diagram of a second optical connector having two longitudinal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0262] Fig.84 is a schematic diagram of an optical connector including three optical input components and three optical output components provided by an embodiment of the present disclosure;

[0263] Fig.85 is a schematic diagram of a first optical connector having three horizontal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0264] Fig.86 is a schematic diagram of a second optical connector having three horizontal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0265] Fig.87 is a schematic diagram of a first optical connector having three longitudinal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0266] Fig.88 is a schematic diagram of a second optical connector having three longitudinal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0267] Fig.89 is a schematic diagram of an optical connector including four light input components and four light output components provided by an embodiment of the present disclosure;

[0268] Fig.90 is a schematic diagram of a first optical connector having four horizontal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0269] Fig.91is a schematic diagram of a second optical connector having four horizontal rows of optical fiber connector pairs provided by an embodiment of the present disclosure;

[0270] Fig.92 is a schematic diagram of a first optical connector having two horizontal and two vertically arranged optical fiber connector pairs provided by an embodiment of the present disclosure;

[0271] Fig.93 is a schematic diagram of a second optical connector having two horizontal and two vertically arranged optical fiber connector pairs provided by an embodiment of the present disclosure;

[0272] Fig.94 is a schematic diagram of a first optical connector provided by an embodiment of the present disclosure, in which an optical input component and an optical output component have a flexible optical cable;

[0273] Fig.95 is a schematic diagram of a second optical connector provided by an embodiment of the present disclosure, in which the optical input component and the optical output component have a flexible optical cable;

[0274] Fig.96 It is a schematic diagram of a first optical bidirectional transmission component provided by an embodiment of the present disclosure having an optical connector with a flexible optical cable;

[0275] Fig.97 is a schematic diagram of a second optical bidirectional transmission component provided by an embodiment of the present disclosure having an optical connector with a flexible optical cable;

[0276] Fig.98 It is a schematic diagram of a first optical connector having an optical input component, an optical output component and an optical bidirectional transmission component in an interface form provided by an embodiment of the present disclosure;

[0277] Fig.99 It is a schematic diagram of a second optical connector having an optical input component, an optical output component and an optical bidirectional transmission component in an interface form provided by an embodiment of the present disclosure;

[0278] Fig.100 is a schematic diagram of a fifth communication system provided by an embodiment of the present disclosure;

[0279] Fig.101 It is a schematic diagram of the sixth communication system provided by an embodiment of the present disclosure.

[0280] Legend

[0281] 100. a first communication device;

[0282] 200. First optical module;

[0283] 1. Electrical connection components, 11. Gold finger connector, 111. Function signal pins, 112. High-speed signal pins;

[0284] 2. Optical emission assembly, 2a. First optical emission assembly, 2b. Second optical emission assembly, 2c. Third optical emission assembly, 2d. Fourth optical emission assembly, 21. Laser group, 21a. First laser group, 21b. Second laser group, 21c. Third laser group, 21d. Fourth laser group, 211. Laser, 22. Combiner group, 22a. First combiner group, 22b. Second combiner group, 22c. Third combiner group, 22d. Fourth combiner group, 221. Primary combiner, 222. Secondary combiner;

[0285] 3. Light receiving component, 3a. First light receiving component, 3b. Second light receiving component, 3c. Third light receiving component, 3d. Fourth light receiving component, 31. Detector group, 31a. First detector group, 31b. Second detector group, 31c. Third detector group, 31d. Fourth detector group, 311. Detector, 32. Wave splitter group, 32a. First wave splitter group, 32b. Second wave splitter group, 32c. Third wave splitter group, 32d. Fourth wave splitter group, 321. Primary wave splitter, 322. Secondary wave splitter;

[0286] 4. an optical ring device, 40. an optical circulator, 40a. a first optical circulator, 40b. a second optical circulator, 41. a non-reciprocal polarization rotation component, 410. a non-reciprocal polarization rotation portion, 410a. a first non-reciprocal polarization rotation portion, 410b. a second non-reciprocal polarization rotation portion, 410c. a third non-reciprocal polarization rotation portion, 410d. a fourth non-reciprocal polarization rotation portion, 411. a half-wave plate, 412. a Faraday rotator, 412a. a a first Faraday rotator, 412b, a second Faraday rotator, 412c, a third Faraday rotator, 412d, a fourth Faraday rotator, 42, a first polarization light splitting / combining component, 42a, a first prism, 42b, a second prism, 421, a first polarization beam splitter, 422, a first reflective element, 43, a second polarization light splitting / combining component, 43a, a third prism, 43b, a fourth prism, 431, a second polarization beam splitter, 432, a second reflective element;

[0287] 5. Wave splitter / combiner assembly, 5a. First wave splitter / combiner assembly, 5b. Second wave splitter / combiner assembly, 50. Prism, 51. Filter, 52. Reflection element;

[0288] 6. Single-fiber bidirectional optical interface;

[0289] 7. Mode filter;

[0290] 8. Optical interface;

[0291] 9. Electrical connection part;

[0292] 300, optical splitter / combiner, 301, optical input interface, 301a, first optical input interface, 301b, second optical input interface, 301c, third optical input interface, 301d, fourth optical input interface, 302, optical output interface, 302a, first optical output interface, 302b, second optical output interface, 302c, third optical output interface, 302d, fourth optical output interface, 303, power splitter;

[0293] 400. second communication device;

[0294] 500. second optical module;

[0295] 600, optical connector, 601, optical input component, 601a, first optical input component, 601b, second optical input component, 601c, third optical input component, 601d, fourth optical input component, 602, optical output component, 602a, first optical output component, 602b, second optical output component, 602c, third optical output component, 602d, fourth optical output component, 603, connector body, 604, optical bidirectional transmission component;

[0296] 700. third optical module;

[0297] λa, the first band, λb, the second band, λc, the third band, λd, the fourth band. DETAILED DESCRIPTION

[0298] like Figure 1 As shown, an embodiment of the present disclosure provides a communication system. The communication system includes a first communication device 100, a first optical module 200, an optical splitter and combiner 300, a second communication device 400, and a second optical module 500. The first optical module 200 and the optical splitter and combiner 300 both have a single-fiber bidirectional optical interface. The first optical module 200 is plugged into the first communication device 100, and the single-fiber bidirectional optical interface of the first optical module 200 is connected to the single-fiber bidirectional optical interface of the optical splitter and combiner 300 through an optical fiber. The first optical module 200 can transmit and receive light beams through the same optical fiber.

[0299] The second optical module 500 is plugged into the second communication device 400, and the optical transmitting port of the second optical module 500 is connected to the optical input interface of the optical splitter 300 through optical fiber, and the optical receiving port of the second optical module 500 is connected to the optical output interface of the optical splitter 300 through optical fiber.

[0300] In some examples, the first communication device 100 and the second communication device 400 are switches. For example, the first communication device 100 is a core point (CP) switch, and the second communication device 400 is an access point (AP) switch. Accordingly, the first optical module 200 is a CP optical module or a central office optical module, and the second optical module 500 is an AP optical module or a terminal optical module.

[0301] In the process of the first communication device 100 sending signals to multiple second communication devices 400, the first communication device 100 sends multiple electrical signals to the first optical module 200. The first optical module 200 converts and combines the multiple electrical signals into a light beam T, and sends the light beam T to the optical splitter and combiner 300 through a single-fiber bidirectional optical interface. The optical splitter and combiner 300 splits the light beam T into multiple light beams, and sends each split light beam to the corresponding second optical module 500 through an optical output interface. The second optical module 500 converts the received light beam into an electrical signal and sends it to the second communication device 400.

[0302] In the process of multiple second communication devices 400 sending signals to the first communication device 100, the second communication device 400 sends an electrical signal to the second optical module 500. The second optical module 500 converts the electrical signal into a light beam and sends it to the optical input interface of the optical splitter and combiner 300, wherein the wavelength bands of the light beams sent by each second optical module 500 are different. The optical splitter and combiner 300 combines the received multiple light beams into a light beam R, and sends the light beam R to the first optical module 200 through a single-fiber bidirectional optical interface. The first optical module 200 splits the light beam R and converts it into multiple electrical signals, and sends the multiple electrical signals to the first communication device 100.

[0303] For the above communication system, the more wavelength bands the light beam transmitted by the single-fiber bidirectional optical interface of the first optical module 200 covers, the more optical signals the light beam can carry, and the greater the communication capacity of the communication system. Therefore, how to expand the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface, that is, how to expand the wavelength capacity of a single fiber, is a key technical issue.

[0304] In the related art, there are two types of optical modules with single-fiber bidirectional optical interfaces. The first type of optical module uses different wavelength bands for the sending and receiving beams, while the second type of optical module uses the same wavelength band for the sending and receiving beams. Under the premise that the total number of wavelength bands is constant, the single-fiber wavelength capacity of the second type of optical module is theoretically twice that of the first type of optical module.

[0305] For example, please refer to Table 1, which shows the 18 coarse wavelength division multiplexer (CWDM) bands specified by the International Telecommunication Union-Telecommunications Standardization Sector (ITU-T). Theoretically, the light beam T sent by the first optical module covers up to nine CWDM bands, and the received light beam R covers up to another nine CWDM bands. The light beam T sent and the received light beam R of the second optical module both cover up to 18 CWDM bands.

[0306] Table 1

[0307] Serial number Central wavelength 1 1271nm 2 1291nm 3 1311nm 4 1331nm 5 1351nm 6 1371nm 7 1391nm 8 1411nm 9 1431nm 10 1451nm 11 1471nm 12 1491nm 13 1511nm 14 1531nm 15 1551nm 16 1571nm 17 1591nm 18 1611nm

[0308] It can be seen that the upper limit of the single-fiber wavelength capacity of the second optical module is relatively high. The second optical module is described in more detail below.

[0309] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram showing the transmission optical path of the second optical module is shown. Figure 3 FIG. 1 is a schematic diagram showing the receiving optical path of the second optical module. Figure 2 and Figure 3 As shown, the optical module includes an optical transmitting component 2, an optical receiving component 3, an optical circulator 40 and a single-fiber bidirectional optical interface 6. The optical circulator 40 includes a non-reciprocal polarization rotation component 41, a first polarization splitting and combining optical component 42 and a second polarization splitting and combining optical component 43. The non-reciprocal polarization rotation component 41 includes a half-wave plate 411 and a Faraday rotator 412, the half-wave plate 411 is used to rotate the polarization direction of the incident light beam by 45° in the forward direction (regardless of the incident direction), and the Faraday rotator 412 is used to rotate the polarization direction of the light beam incident from the optical transmitting component 2 by 45° in the forward direction, and to rotate the polarization direction of the light beam incident from the single-fiber bidirectional optical interface 6 by 45° in the reverse direction. The first polarization splitting and combining optical component 42 includes a first polarization beam splitter 421 and a first reflecting element 422, and the second polarization splitting and combining optical component 43 includes a second polarization beam splitter 431 and a second reflecting element 432.

[0310] In order to distinguish light beams of different polarization states, the light beam of the first polarization state is called P light, and the light beam of the second polarization state is called S light. The polarization directions of P light and S light are orthogonal, and P light is represented by a vertical line or a horizontal line in the drawings, and S light is represented by a dot in the drawings. In addition, it is assumed that the first polarization beam splitter 421 and the second polarization beam splitter 431 are both used to transmit P light and reflect S light.

[0311] like Figure 2 As shown, on the light transmission path of the optical module, the optical transmission component 2 transmits a light beam T to the first polarization beam splitter 421 , and the light beam T is polarized and split into S light and P light by the first polarization beam splitter 421 .

[0312] The separated P light is transmitted to the Faraday rotator 412 by the first polarization beam splitter 421. The polarization direction of the P light is positively rotated by 45° after passing through the first Faraday rotator 412, and then the polarization direction of the P light is positively rotated by 45° after passing through the half-wave plate 411, and becomes the S light. The S light is reflected by the second reflective element 432 to the second polarization beam splitter 431.

[0313] The separated S light is reflected by the first polarization beam splitter 421 to the first reflection element 422, and the first reflection element 422 reflects the S light to the Faraday rotator 412. The polarization direction of the S light is positively rotated by 45° after passing through the Faraday rotator 412, and the polarization direction of the S light is positively rotated by 45° after passing through the half-wave plate 411, and becomes P light. The P light is incident on the second polarization beam splitter 431.

[0314] The second polarization beam splitter 431 receives the P light and the S light at the same position, and combines the P light and the S light into a light beam T by transmitting the P light and reflecting the S light. Then, the light beam T is transmitted to the outside through the single-fiber bidirectional optical interface 6 .

[0315] like Figure 3 As shown, on the receiving optical path of the optical module, the single-fiber bidirectional optical interface 6 sends the received light beam R to the second polarization beam splitter 431, and the second polarization beam splitter 431 splits the light beam R into S light and P light.

[0316] The separated P light is transmitted to the half-wave plate 411 by the second polarization beam splitter 431. After passing through the half-wave plate 411, the polarization direction of the P light is forwardly rotated by 45°. After passing through the Faraday rotator 412, the polarization direction is reversely rotated by 45°, and it turns back to P light. The P light is incident on the first reflection element 422 and is reflected by the first reflection element 422 to the first polarization beam splitter 421.

[0317] The separated S light is reflected by the second polarization beam splitter 431 to the second reflection element 432, and the second reflection element 432 reflects the S light to the half-wave plate 411. The polarization direction of the S light is forward rotated by 45° after passing through the half-wave plate 411, and the polarization direction of the S light is reversely rotated by 45° after passing through the Faraday rotator 412, and then it is transformed back into S light. The S light is incident on the first polarization beam splitter 421.

[0318] The first polarization beam splitter 421 receives the P light and the S light at the same position, and combines the P light and the S light into a light beam T by transmitting the P light and reflecting the S light, and the light beam T is transmitted toward the light receiving component 3 .

[0319] It can be seen from the above content that the light beam T sent by the optical transmitting component 2 is incident on the single-fiber bidirectional optical interface 6 after passing through the optical circulator 40, while the light beam R sent from the single-fiber bidirectional optical interface 6 will not be incident on the light transmitting component 2 after passing through the optical circulator 40, but will be incident on the light receiving component 3. That is, the optical circulator 40 is an optical device with non-reciprocity, and non-reciprocity refers to the property that the light beam cannot return along the original path after passing through the optical system (i.e., the optical circulator 40) in one direction. The reason for the non-reciprocity is the non-reciprocal polarization rotation component 41, and more specifically, the Faraday rotator 412 has different rotation directions for the polarization of light beams incident from different directions.

[0320] Theoretically, as long as the wavelength range of the light beam T and the light beam R can be expanded, the single-fiber wavelength capacity can be expanded. However, the Faraday rotator 412 adjusts the polarization direction of the light beam by applying a magnetic field, and because different wavelengths of light have different sensitivities to the magnetic field, the wavelength range of a light beam incident on the optical circulator 40 cannot be too wide, otherwise the Faraday rotator 412 of the optical circulator 40 cannot effectively process light of certain wavelengths (or cannot effectively adjust the polarization direction). For the convenience of subsequent description, the upper limit value of the wavelength range of a light beam incident on the optical circulator 40 is referred to as the upper limit wavelength range. The upper limit wavelength range limits the expansion of the single-fiber wavelength capacity, so that the single-fiber wavelength capacity of the optical module in the related art cannot exceed the upper limit wavelength range. For example, the light beam transmitted by the single-fiber bidirectional optical interface of the optical module using the optical circulator 40 in the related art generally only covers four CWDM bands.

[0321] In view of the above technical problems, an embodiment of the present disclosure provides an optical module. The optical module includes multiple optical transmitting components 2, multiple optical receiving components 3, an optical ring device 4 (including one or more optical circulators 40) and a wavelength splitter / combiner component 5, and what is input to the optical ring device 4 is a multi-channel narrow-band light beam, and the single-fiber bidirectional optical interface 6 of the optical module transmits a wide-band light beam after the multi-channel narrow-band light beam is combined. In this way, by setting the optical ring device 4 to process multiple light beams of different bands separately, the wavelength range of the light beam that can be processed by the optical ring device 4 is expanded, thereby expanding the single-fiber wavelength capacity of the optical module. Below, the optical module provided in the embodiment of the present disclosure is exemplified.

[0322] like Figure 4As shown, the optical module includes an electrical connection component 1, multiple optical emitting components 2, multiple optical receiving components 3, an optical ring device 4, a splitter-combiner component 5 and a single-fiber bidirectional optical interface 6. The electrical connection component 1 is electrically connected to the multiple optical emitting components 2 and the multiple optical receiving components 3, and is used to be electrically connected to the communication device. In the optical transmission direction, each optical emitting component 2 is used to send a light beam T to the optical ring device 4, and the light beams T sent by different optical emitting components 2 have different bands. The optical ring device 4 is used to send multiple light beams T of different bands to the splitter-combiner component 5. The splitter-combiner component 5 is used to combine multiple light beams T and send them to the outside through the single-fiber bidirectional optical interface 6. In the optical receiving direction, the splitter-combiner component 5 is used to split the light beam received through the single-fiber bidirectional optical interface 6 into multiple light beams R of different bands, and send multiple light beams R of different bands to the optical ring device 4. The optical ring device 4 is used to send a light beam R to each light receiving component 3.

[0323] The optical module is the first optical module 200. The optical ring device 4 includes one or more optical circulators 40. The light beam T refers to the light beam sent by the optical transmitting component 2, and the light beam R refers to the light beam received through the single-fiber bidirectional optical interface 6.

[0324] The technical solution provided by the embodiment of the present disclosure is that what are transmitted in the optical ring device 4 of the optical module are multiple light beams of different wavelength bands, and the transmission paths of the multiple light beams in the optical ring device 4 are different. Therefore, the optical ring device 4 can process the multiple light beams separately, for example, applying different magnetic fields on the transmission paths of the multiple light beams of different wavelength bands. In this way, although the wavelength range of each light beam still cannot exceed the upper limit wavelength range, the wavelength range of the light beam after the multiple light beams are combined, that is, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface 6 can exceed the upper limit wavelength range. The embodiment of the present disclosure expands the wavelength range of the light beam that can be processed by the optical ring device 4 by setting the optical ring device 4 to process the multiple light beams of different wavelength bands separately, thereby expanding the single-fiber wavelength capacity of the optical module.

[0325] Assuming that the wavelength range of each light beam incident to the light ring device 4 is the upper wavelength range, and there are N light paths incident to the light ring device 4, the wavelength range of the light beam that can be processed by the light ring device 4 is equal to N times the upper wavelength range.

[0326] The following is an exemplary description of the wavelength range of the light beam T, the light beam R, and the light beam transmitted by the single-fiber bidirectional optical interface 6.

[0327] In some examples, the wavelength range of each light beam T and each light beam R is less than 170 nm.

[0328] In some examples, the wavelength range of each light beam T and each light beam R covers at most eight CWDM bands. In some examples, the wavelength range of each light beam T and each light beam R covers four CWDM bands.

[0329] The technical solution provided by the embodiment of the present disclosure sets the wavelength range of each light beam T and each light beam R to be less than 170 nm or to cover up to eight CWDM bands, so that the wavelength range of each light beam T and each light beam R is narrow (less than the upper limit wavelength range), and the optical ring device 4 can effectively process each light beam T and each light beam R.

[0330] In some examples, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface 6 is greater than 200 nm.

[0331] In some examples, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface 6 covers at least ten CWDM bands.

[0332] In some examples, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface 6 covers sixteen CWDM bands.

[0333] The technical solution provided by the embodiment of the present disclosure expands the single-fiber wavelength capacity of the optical module by setting the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface 6 to be greater than 200 nm or to cover at least ten CWDM bands.

[0334] The following is an exemplary description of the implementation of the light emitting component 2.

[0335] In some examples, the light emitting assembly 2 includes a laser 211 , and the light emitting assembly 2 sends a single-band light beam T to the optical ring device 4 .

[0336] In other examples, such as Figure 5 and Figure 6 As shown, the optical transmission component 2 includes a laser group 21 and a combiner group 22. The laser group 21 includes a plurality of lasers 211. The combiner group 22 is used to combine the multiple single-band light beams sent by the laser group 21 into a composite-band light beam T, and send the composite-band light beam T to the optical ring device 4. By combining the light beams sent by the laser group 21 and then sending them to the optical ring device 4, it is possible to avoid the optical ring device 4 receiving too many light beams T, which is conducive to reducing the volume and manufacturing difficulty of the optical ring device 4.

[0337] In some examples, each laser 211 is used to transmit a light beam in a CWDM band.

[0338] In some examples, such as Figure 6As shown, the laser group 21 includes four lasers 211. In other examples, the laser group 21 includes eight lasers 211.

[0339] In some examples, such as Figure 5 As shown, the plurality of optical emission components 2 include a first optical emission component 2a, a second optical emission component 2b, a third optical emission component 2c and a fourth optical emission component 2d. The first optical emission component 2a includes a first laser group 21a and a first combiner group 22a. The first combiner group 22a is used to combine the multiple single-band (λ1...λn) light beams sent by the first laser group 21a into a light beam T of the first band, and send the light beam T of the first band to the optical ring device 4. The second optical emission component 2b includes a second laser group 21b and a second combiner group 22b. The second combiner group 22b is used to combine the multiple single-band (λn+1...λ2n) light beams sent by the second laser group 21b into a light beam T of the second band, and send the light beam T of the second band to the optical ring device 4. The third optical emission component 2c includes a third laser group 21c and a third combiner group 22c. The third combiner group 22c is used to combine the multiple single-band (λ2n+1...λ3n) light beams sent by the third laser group 21c into a third-band light beam T, and send the third-band light beam T to the optical ring device 4. The fourth optical transmission component 2d includes a fourth laser group 21d and a fourth combiner group 22d. The fourth combiner group 22d is used to combine the multiple single-band (λ3n+1...λ4n) light beams sent by the fourth laser group 21d into a fourth-band light beam T, and send the fourth-band light beam T to the optical ring device 4. In the accompanying drawings, λa represents the first band, λb represents the second band, λc represents the third band, and λd represents the fourth band.

[0340] In other examples, the plurality of light emitting components 2 only include any two or three of the first light emitting component 2a, the second light emitting component 2b, the third light emitting component 2c, and the fourth light emitting component 2d.

[0341] The embodiments of the present disclosure do not limit the implementation of the combiner group 22. In some examples, the combiner group 22 includes one combiner. In other examples, the combiner group 22 includes multiple combiners. For example, Figure 6 As shown, the combiner group 22 includes two primary combiners 221 and one secondary combiner 222. Each primary combiner 221 is used to combine the single-band light beams sent by at least two lasers 211, and send the combined light beam to the secondary combiner 222. The secondary combiner 222 is used to combine the light beams sent by the two primary combiners 221 into a light beam T, and send the light beam T to the optical ring device 4.

[0342] Next, the implementation of the light receiving component 3 is exemplarily described.

[0343] In some examples, the light receiving component 3 includes a detector 311 , and the light ring device 4 sends a single-band light beam R to the light receiving component 3 .

[0344] In other examples, such as Figure 7 and Figure 8 As shown, the light receiving assembly 3 includes a detector group 31 and a splitter group 32. The detector group 31 includes a plurality of detectors 311. The splitter group 32 is used to split a composite band light beam R sent by the light ring device 4 into multiple single-band light beams, and send corresponding light beams to each detector 311. Through this design, it is possible to avoid too many paths of light beams R received by the light ring device 4, which is conducive to reducing the volume and manufacturing difficulty of the light ring device 4.

[0345] In some examples, each detector 311 is used to receive a CWDM band light beam.

[0346] In some examples, the detector group 31 includes four detectors 311. In other examples, the detector group 31 includes eight detectors 311.

[0347] In some examples, such as Figure 7 As shown, the plurality of light receiving components 3 include a first light receiving component 3a, a second light receiving component 3b, a third light receiving component 3c and a fourth light receiving component 3d. The first light receiving component 3a includes a first detector group 31a and a first splitter group 32a. The first splitter group 32a is used to split the light beam R of the first band sent by the optical ring device 4 into multiple single-band (λ1...λn) light beams, and send one single-band light beam to each detector 311 in the first detector group 31a. The second light receiving component 3b includes a second detector group 31b and a second splitter group 32b. The second splitter group 32b is used to split the light beam R of the second band sent by the optical ring device 4 into multiple single-band light beams (λn+1...λ2n), and send one single-band light beam to each detector 311 in the second detector group 31b. The third light receiving component 3c includes a third detector group 31c and a third splitter group 32c. The third splitter group 32c is used to split the third band light beam R sent by the optical ring device 4 into multiple single-band light beams (λ2n+1...λ3n), and send one single-band light beam to each detector 311 in the third detector group 31c. The fourth light receiving assembly 3d includes a fourth detector group 31d and a fourth splitter group 32d. The fourth splitter group 32d is used to split the fourth band light beam R sent by the optical ring device 4 into multiple single-band light beams (λ3n+1...λ4n), and send one single-band light beam to each detector 311 in the fourth detector group 31d.

[0348] In other examples, the plurality of light receiving components 3 include only any two or three of the first light receiving component 3 a , the second light receiving component 3 b , the third light receiving component 3 c , and the fourth light receiving component 3 d .

[0349] The embodiment of the present disclosure does not limit the implementation method of the splitter group 32. In some examples, the splitter group 32 includes one splitter. In other examples, the splitter group 32 includes multiple splitters. For example, Figure 8 As shown, the splitter group 32 includes a primary splitter 321 and two secondary splitters 322. The primary splitter 321 is used to split a beam R sent by the optical ring device 4 into two beams, and send the two beams to the two secondary splitters 322 respectively. Each secondary splitter 322 is used to split a received beam R into multiple single-band beams, and send them to the corresponding detectors 311 respectively.

[0350] In some examples, the above-mentioned combiner and splitter are space-type wavelength division multiplexers. In other examples, the above-mentioned combiner and splitter are waveguide-type wavelength division multiplexers.

[0351] In some examples, the above-mentioned combiner, splitter and optical ring device 4 are connected through a spatial coupling method such as a lens and a collimator.

[0352] In other examples, the above-mentioned combiner, splitter and optical ring device 4 are connected through optical fiber. Then the light beam sent by the combiner is coupled into the optical fiber through a lens, and after being transmitted through a section of optical fiber, it enters the optical ring device 4. The light beam sent by the optical ring device is coupled into the optical fiber through a lens, and after being transmitted through a section of optical fiber, it enters the splitter.

[0353] The following is an exemplary description of the implementation of the light ring device 4.

[0354] In some examples, in order to enable the light ring device 4 to effectively process multiple light beams of different wavelength bands, such as Fig. 9 As shown, the light ring device 4 includes a plurality of groups of non-reciprocal polarization rotation parts 410. The working bands of the plurality of groups of non-reciprocal polarization rotation parts 410 are different, and the working bands of the plurality of groups of non-reciprocal polarization rotation parts 410 respectively cover the bands of the multiple light beams T (or the bands of the multiple light beams R). In this way, each light beam incident to the light ring device 4 is processed by a corresponding group of non-reciprocal polarization rotation parts 410. Each group of non-reciprocal polarization rotation parts 410 includes one or two non-reciprocal polarization rotation parts 410.

[0355] In some examples, the magnetic fields of the multiple groups of non-reciprocal polarization rotating parts 410 are different. For example, different groups of non-reciprocal polarization rotating parts 410 include different Faraday rotators 412.

[0356] In some examples, multiple sets of non-reciprocal polarization rotation sections 410 are located on the same optical circulator 40 .

[0357] In some other examples, multiple sets of non-reciprocal polarization rotation parts 410 are located on multiple optical circulators 40 .

[0358] In the following, the structure of the optical ring device 4 and the transmitting optical path and the receiving optical path of the optical module are exemplarily described in combination with the specific numbers of the optical transmitting components 2 and the optical receiving components 3 .

[0359] (1) In some examples, such as Fig.10 - Fig.15 As shown, the plurality of light emitting modules 2 include a first light emitting module 2a and a second light emitting module 2b. The plurality of light receiving modules 3 include a first light receiving module 3a and a second light receiving module 3b.

[0360] like Fig.11 or Fig.14 As shown, in the light sending direction, the first light emitting assembly 2a sends light to the light ring device 4 ( Fig.11 In the figure are the first optical circulator 40a and the second optical circulator 40b, Fig.14 In the figure, the first optical circulator 40a) sends a light beam T of the first wavelength band. The second optical transmitting component 2b sends a light beam T of the second wavelength band to the optical ring device 4. After the optical ring device 4 processes the light beam T of the first wavelength band and the light beam T of the second wavelength band, it sends the light beam T of the first wavelength band and the light beam T of the second wavelength band to the splitter-combiner component 5. The splitter-combiner component 5 combines the light beam T of the first wavelength band and the light beam T of the second wavelength band, and sends the combined light beam to the outside through the single-fiber bidirectional optical interface 6.

[0361] like Fig.12 or Fig.15 As shown, in the light receiving direction, the wavelength splitter / combiner component 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam R of a first wavelength band and a light beam R of a second wavelength band, and sends the light beam R of the first wavelength band and the light beam R of the second wavelength band to the optical ring device 4. After processing the light beam R of the first wavelength band and the light beam R of the second wavelength band, the optical ring device 4 sends the light beam R of the first wavelength band to the first light receiving component 3a, and sends the light beam R of the second wavelength band to the second light receiving component 3b.

[0362] In some examples, in order to enable the light ring device 4 to effectively process both the light beam of the first wavelength band and the light beam of the second wavelength band, as shown in FIG. Fig.11 - Fig.12 as well as Fig.14 and Fig.15As shown, the optical ring device 4 includes a first non-reciprocal polarization rotation part 410a and a second non-reciprocal polarization rotation part 410b. The working band of the first non-reciprocal polarization rotation part 410a covers the first band, and is used to adjust the polarization direction of the light beam in the first band. The working band of the second non-reciprocal polarization rotation part 410b covers the second band, and is used to adjust the polarization direction of the light beam in the second band.

[0363] The first non-reciprocal polarization rotation part 410a is located on the transmission path of the two polarization states of the light beam separated from the light beam of the first wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The second non-reciprocal polarization rotation part 410b is located on the transmission path of the two polarization states of the light beam separated from the light beam of the second wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The first adjustment and the second adjustment are different, for example, one of the first adjustment and the second adjustment is to rotate the polarization direction of the light beam by 90°, and the other is to keep the polarization direction of the light beam unchanged.

[0364] In some examples, such as Fig.10 - Fig.12 As shown, the first non-reciprocal polarization rotation part 410a and the second non-reciprocal polarization rotation part 410b are respectively located in two optical circulators 40. For example, the optical ring device 4 includes a first optical circulator 40a and a second optical circulator 40b. The first optical circulator 40a includes the first non-reciprocal polarization rotation part 410a. The second optical circulator 40b includes the second non-reciprocal polarization rotation part 410b.

[0365] like Fig.11 As shown, in the light transmission direction, the first optical circulator 40a receives the light beam T of the first wavelength band from the first optical transmission component 2a, and sends the light beam T of the first wavelength band to the splitter / combiner component 5. The second optical circulator 40b receives the light beam T of the second wavelength band from the second optical transmission component 2b, and sends the light beam T of the second wavelength band to the splitter / combiner component 5. Fig.12 As shown, in the light receiving direction, the first optical circulator 40a receives the light beam R of the first wavelength band from the wave splitter / combiner component 5, and sends the light beam R of the first wavelength band to the first light receiving component 3a. The second optical circulator 40b receives the light beam R of the second wavelength band from the wave splitter / combiner component 5, and sends the light beam R of the second wavelength band to the second light receiving component 3b.

[0366] In other examples, such as Fig.14 and Fig.15 As shown, the first non-reciprocal polarization rotation portion 410a and the second non-reciprocal polarization rotation portion 410b are located in the same optical circulator 40 (the first optical circulator 40a).

[0367] like Fig.14 As shown, in the light transmission direction, the first optical circulator 40a receives the light beam T of the first wavelength band from the first optical transmission component 2a, receives the light beam T of the second wavelength band from the second optical transmission component 2b, and sends the light beam T of the first wavelength band and the light beam T of the second wavelength band to the wavelength splitter / combiner 5. Fig.15 As shown, in the light receiving direction, the first optical circulator 40a receives the light beam R of the first band and the light beam R of the second band from the wave splitter / combiner component 5, sends the light beam R of the first band to the first light receiving component 3a, and sends the light beam R of the second band to the second light receiving component 3b.

[0368] The technical solution provided by the embodiment of the present disclosure is that the first optical circulator 40a includes the first non-reciprocal polarization rotation part 410a and the second non-reciprocal polarization rotation part 410b, so that one optical circulator 40 can process two light beams of different wavelength bands accordingly. In this way, the number of optical circulators 40 required to be included in the optical module is reduced, and the volume and cost of the optical module are reduced.

[0369] In some examples, such as Fig.14 - Fig.16 As shown, the first optical circulator 40a includes a non-reciprocal polarization rotation component 41, a first polarization splitting and combining optical component 42, and a second polarization splitting and combining optical component 43. The non-reciprocal polarization rotation component 41 includes a first non-reciprocal polarization rotation part 410a and a second non-reciprocal polarization rotation part 410b. The first polarization splitting and combining optical component 42 is located on the optical path between the first optical transmitting component 2a, the second optical transmitting component 2b, and the non-reciprocal polarization rotation component 41, and is located on the optical path between the first optical receiving component 3a, the second optical receiving component 3b, and the non-reciprocal polarization rotation component 41. The second polarization splitting and combining optical component 43 is located on the optical path between the splitting and combining component 5 and the non-reciprocal polarization rotation component 41.

[0370] Compared with setting the first non-reciprocal polarization rotation part 410a and the second non-reciprocal polarization rotation part 410b in two optical circulators 40, the technical solution provided by the embodiment of the present disclosure only requires a first polarization splitting and combining component 42 and a second polarization splitting and combining component 43 to realize the splitting and combining of two light beams, thereby realizing the multiplexing of polarization splitting and combining components, saving the number of polarization splitting and combining components, reducing costs, and also improving the integration density of optical devices.

[0371] In some examples, such as Fig.16As shown, the non-reciprocal polarization rotation component 41 includes a half-wave plate 411, a first Faraday rotator 412a, and a second Faraday rotator 412b. The first Faraday rotator 412 and a portion of the half-wave plate 411 form a first non-reciprocal polarization rotation portion 410a, and the second Faraday rotator 412b and a portion of the half-wave plate 411 form a second non-reciprocal polarization rotation portion 410b. The working band of the first Faraday rotator 412a covers the first band, and the working band of the second Faraday rotator 412b covers the second band.

[0372] In some examples, such as Fig.14 - Fig.16 As shown, the first optical circulator 40a includes two first non-reciprocal polarization rotation parts 410a and two second non-reciprocal polarization rotation parts 410b, and the first non-reciprocal polarization rotation parts 410a and the second non-reciprocal polarization rotation parts 410b are arranged alternately. The two first non-reciprocal polarization rotation parts 410a are respectively used to receive the two polarization state light beams separated from the light beam of the first wavelength band, and the two second non-reciprocal polarization rotation parts 410b are respectively used to receive the two polarization state light beams separated from the light beam of the second wavelength band.

[0373] The present disclosure does not limit the arrangement of the half-wave plate 411 and the Faraday rotator 412. In some examples, such as Fig.16 As shown, the half-wave plate 411 is located on the optical path between the Faraday rotator 412 and the second polarization light-splitting and light-combining component 43. In other examples, the half-wave plate 411 is located on the optical path between the Faraday rotator 412 and the first polarization light-splitting and light-combining component 42 (eg, Fig.11 and Fig.12 shown).

[0374] The first polarization light splitting / combining component 42 and the second polarization light splitting / combining component 43 are exemplarily described below.

[0375] In some examples, such as Fig.14 As shown, in the light transmission direction, the first polarization light splitting / combining component 42 is used to polarization-split the light beam T of the first band and the light beam T of the second band, and sends the two polarization-state light beams separated from the light beam T of the first band to the first non-reciprocal polarization rotation part 410a, and sends the two polarization-state light beams separated from the light beam T of the second band to the second non-reciprocal polarization rotation part 410b. The second polarization light splitting / combining component 43 is used to combine the two polarization-state light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam T of the first band, and combine the two polarization-state light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam T of the second band, and send the light beam T of the first band and the light beam T of the second band to the splitting / combining component 5.

[0376] like Fig.15As shown, in the light receiving direction, the second polarization light splitting / combining component 43 is used to polarization-split the light beam R of the first band and the light beam R of the second band, and sends the two polarization states of the light beam R separated from the light beam R of the first band to the first non-reciprocal polarization rotation part 410a, and sends the two polarization states of the light beam R separated from the light beam R of the second band to the second non-reciprocal polarization rotation part 410b. The first polarization light splitting / combining component 42 is used to combine the two polarization states of the light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam R of the first band, and combine the two polarization states of the light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam R of the second band, and send the light beam R of the first band to the first light receiving component 3a, and send the light beam R of the second band to the second light receiving component 3b.

[0377] In some examples, such as Fig.14 - Fig.16 As shown, the first polarization light-splitting and light-combining component 42 includes a first polarization beam splitter 421 and a first reflective element 422 . The second polarization light-splitting and light-combining component 43 includes a second polarization beam splitter 431 and a second reflective element 432 .

[0378] In some examples, such as Fig.17 As shown, the first polarization light splitting and combining component 42 includes a first prism 42a, a second prism 42b and a first reflective element 422. The first prism 42a and the second prism 42b are attached to each other, and a first polarization beam splitter 421 is formed between the first prism 42a and the second prism 42b. The first reflective element 422 is attached to the second prism 42b.

[0379] In some examples, such as Fig.17 As shown, the second polarization light splitting and combining component 43 includes a third prism 43a, a fourth prism 43b and a second reflective element 432. The third prism 43a and the fourth prism 43b are attached to each other, and a second polarization beam splitter 431 is formed between the third prism 43a and the fourth prism 43b. The second reflective element 432 is attached to the fourth prism 43b.

[0380] The following is a more detailed exemplary description of the transmitting optical path and the receiving optical path of the optical module.

[0381] like Fig.14 And refer to Fig.17 As shown, in the light transmission direction, the first light transmitting component 2a transmits a light beam T of a first wavelength band to the first polarization beam splitter 421. The second light transmitting component 2b transmits a light beam T of a second wavelength band to the first polarization beam splitter 421.

[0382] The light beam T of the first wavelength band is polarized and split into S light and P light by the first polarization beam splitter 421. Among them, the P light separated from the light beam T of the first wavelength band is transmitted to the first reflecting element 422 by the first polarization beam splitter 421. The first reflecting element 422 reflects the P light to the first Faraday rotator 412a. After passing through the first Faraday rotator 412a, the polarization direction of the P light is positively rotated by 45°, and after passing through the half-wave plate 411, the polarization direction is positively rotated by 45° to become S light. The S light is incident on the second polarization beam splitter 431. The S light separated from the light beam T of the first wavelength band is reflected by the first polarization beam splitter 421 to the first Faraday rotator 412a. After passing through the first Faraday rotator 412a, the polarization direction of the S light is positively rotated by 45°, and after passing through the half-wave plate 411, the polarization direction is positively rotated by 45° to become P light. The P light is incident on the second reflecting element 432, and is reflected by the second reflecting element 432 to the second polarization beam splitter 431. The second polarization beam splitter 431 receives the P light and the S light at the same position, and combines the P light and the S light into a light beam T of the first wavelength band by transmitting the P light and reflecting the S light. Then, the light beam T of the first wavelength band is sent to the wavelength splitter / combiner 5.

[0383] The light beam T of the second wavelength band is polarized and split into S light and P light by the first polarization beam splitter 421. Among them, the P light separated from the light beam T of the second wavelength band is transmitted to the first reflecting element 422 by the first polarization beam splitter 421. The first reflecting element 422 reflects the P light to the second Faraday rotator 412b. After passing through the second Faraday rotator 412b, the polarization direction of the P light is positively rotated by 45°, and after passing through the half-wave plate 411, the polarization direction is positively rotated by 45°, and becomes S light. The S light is incident on the second polarization beam splitter 431. The S light separated from the light beam T of the second wavelength band is reflected by the first polarization beam splitter 421 to the second Faraday rotator 412b. After passing through the second Faraday rotator 412b, the polarization direction of the S light is positively rotated by 45°, and after passing through the half-wave plate 411, the polarization direction is positively rotated by 45°, and becomes P light. The P light is incident on the second reflecting element 432, and is reflected by the second reflecting element 432 to the second polarization beam splitter 431. The second polarization beam splitter 431 receives the P light and the S light at the same position, and combines the P light and the S light into a light beam T of the second wavelength band by transmitting the P light and reflecting the S light. Then, the light beam T of the second wavelength band is sent to the wavelength splitter / combiner 5.

[0384] like Fig.15 And refer to Fig.17 As shown, in the light receiving direction, the wavelength splitter / combiner component 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam R of a first band and a light beam R of a second band, and sends the light beam R of the first band and the light beam R of the second band to the second polarization beam splitter 431.

[0385] The light beam R of the first wavelength band is polarized and split into S light and P light by the second polarization beam splitter 431. Among them, the P light separated from the light beam R of the first wavelength band is transmitted to the second reflective element 432 by the second polarization beam splitter 431. The second reflective element 432 reflects the P light to the half-wave plate 411. After passing through the half-wave plate 411, the polarization direction of the P light is rotated forward by 45°, and after passing through the first Faraday rotator 412a, the polarization direction is rotated reversely by 45°, and then it turns back to P light. The P light is incident on the first polarization beam splitter 421. The S light separated from the light beam R of the first wavelength band is reflected to the half-wave plate 411 by the second polarization beam splitter 431. After passing through the half-wave plate 411, the polarization direction of the S light is rotated forward by 45°, and after passing through the first Faraday rotator 412a, the polarization direction is rotated reversely by 45°, and then it turns back to S light. The S light is incident on the first reflective element 422, and is reflected by the first reflective element 422 to the first polarization beam splitter 421. The first polarization beam splitter 421 receives the P light and the S light at the same position, and combines the P light and the S light into a first wavelength band light beam R by transmitting the P light and reflecting the S light. Then, the first wavelength band light beam R is sent to the first light receiving component 3 a.

[0386] The light beam R of the second wavelength band is polarized and split into S light and P light by the second polarization beam splitter 431. Among them, the P light separated from the light beam R of the second wavelength band is transmitted to the second reflective element 432 by the second polarization beam splitter 431. The second reflective element 432 reflects the P light to the half-wave plate 411. After passing through the half-wave plate 411, the polarization direction of the P light is rotated forward by 45°, and after passing through the second Faraday rotator 412b, the polarization direction is rotated reversely by 45°, and it is transformed back into P light. The P light is incident on the first polarization beam splitter 421. The S light separated from the light beam R of the second wavelength band is reflected to the half-wave plate 411 by the second polarization beam splitter 431. After passing through the half-wave plate 411, the polarization direction of the S light is rotated forward by 45°, and after passing through the second Faraday rotator 412b, the polarization direction is rotated reversely by 45°, and it is transformed back into S light. The S light is incident on the first reflective element 422, and is reflected by the first reflective element 422 to the first polarization beam splitter 421. The first polarization beam splitter 421 receives the P light and the S light at the same position, and combines the P light and the S light into a second wavelength band light beam T by transmitting the P light and reflecting the S light. Then, the second wavelength band light beam R is sent to the second light receiving component 3b.

[0387] Next, the implementation of the wavelength splitting and combining component 5 (or called wide-spectrum photosynthesis and splitting) is exemplarily described.

[0388] In some examples, such as Fig.11 - Fig.12 as well as Fig.14 - Fig.15 As shown, the wave splitter / combiner assembly 5 comprises a filter 51 and a reflective element 52. In which, illustratively, the filter 51 is used to reflect the light beam of the first wavelength band and transmit the light beam of the second wavelength band.

[0389] like Fig.14 As shown, in the light transmission direction, the filter 51 is used to receive the light beam T of the first wavelength band. The reflective element 52 is used to receive the light beam T of the second wavelength band and reflect the light beam T of the second wavelength band toward the filter 51. The filter 51 is used to combine the light beam T of the first wavelength band and the light beam T of the second wavelength band and send the combined light beam to the single-fiber bidirectional optical interface 6. Fig.15 As shown, in the light receiving direction, the filter 51 is used to split the received light beam into a light beam R of a first wavelength band and a light beam R of a second wavelength band, and send the light beam R of the first wavelength band to the first optical circulator 40a, and send the light beam R of the second wavelength band to the reflective element 52. The reflective element 52 is used to send the light beam R of the second wavelength band to the first optical circulator 40a.

[0390] For the implementation of the first optical circulator 40a including the first non-reciprocal polarization rotation part 410a and the second non-reciprocal polarization rotation part 410b, since the first optical circulator 40a transmits two light beams, in some examples, such as Fig.17 As shown, the wave splitter / combiner component 5 is integrated with the first optical circulator 40a, thereby improving the integration of optical devices of the optical module.

[0391] For example, Fig.17 As shown, the wave splitter / combiner assembly 5 includes a prism 50, a filter 51, and a reflective element 52. The prism 50 is attached to the second polarization splitter / combiner assembly 43, the filter 51 is located between the prism 50 and the second polarization splitter / combiner assembly 43, and the reflective element 52 is plated on the prism 50. In some examples, the prism 50 is attached to the fourth prism 43b.

[0392] Fig.17 The optical component shown not only realizes the non-reciprocal transmission of light, but also has the function of wave splitting and combining. In the light sending direction, the optical component can combine two light beams of different wavelengths, and in the light receiving direction, on the basis of realizing non-reciprocity, split the received light beam into two light beams of different wavelengths, and send them to the first light receiving component 3a and the second light receiving component 3b respectively.

[0393] (2) In some examples, such as Fig.18 - Fig. 20 As shown, the plurality of light emitting components 2 include a first light emitting component 2a, a second light emitting component 2b and a third light emitting component 2c. The plurality of light receiving components 3 include a first light receiving component 3a, a second light receiving component 3b and a third light receiving component 3c.

[0394] like Fig.19As shown, in the light transmission direction, the first optical emitting component 2a transmits a light beam T of the first wavelength band to the optical ring device 4 (the first optical ring device 40a in the figure). The second optical emitting component 2b transmits a light beam T of the second wavelength band to the optical ring device 4. The third optical emitting component 2c transmits a light beam T of the third wavelength band to the optical ring device 4. The optical ring device 4 processes the light beam T of the first wavelength band, the light beam T of the second wavelength band, and the light beam T of the third wavelength band, and transmits them to the wavelength splitter / combiner component 5. The wavelength splitter / combiner component 5 combines the light beam T of the first wavelength band, the light beam T of the second wavelength band, and the light beam T of the third wavelength band, and transmits them to the outside through the single-fiber bidirectional optical interface 6.

[0395] like Fig. 20 As shown. In the light receiving direction, the splitter-combiner component 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam R of the first wavelength band, a light beam R of the second wavelength band, and a light beam R of the third wavelength band, and sends the light beam R of the first wavelength band, the light beam R of the second wavelength band, and the light beam R of the third wavelength band to the optical ring device 4. After processing the light beam R of the first wavelength band, the light beam R of the second wavelength band, and the light beam R of the third wavelength band, the optical ring device 4 sends the light beam R of the first wavelength band to the first optical receiving component 3a, sends the light beam R of the second wavelength band to the second optical receiving component 3b, and sends the light beam R of the third wavelength band to the third optical receiving component 3c.

[0396] In some examples, in order to enable the light ring device 4 to effectively process the light beams in the first wavelength band, the light beams in the second wavelength band, and the light beams in the third wavelength band, as shown in FIG. Fig.19 and Fig. 20 As shown, the light ring device 4 includes a first non-reciprocal polarization rotation part 410a, a second non-reciprocal polarization rotation part 410b and a third non-reciprocal polarization rotation part 410c. The working band of the first non-reciprocal polarization rotation part 410a covers the first band, and is used to adjust the polarization direction of the light beam in the first band. The working band of the second non-reciprocal polarization rotation part 410b covers the second band, and is used to adjust the polarization direction of the light beam in the second band. The working band of the third non-reciprocal polarization rotation part 410c covers the third band, and is used to adjust the polarization direction of the light beam in the third band.

[0397] The third non-reciprocal polarization rotation part 410c is located on the transmission path of the two polarization states of the light beam separated from the light beam of the third band, and is used to make a first adjustment to the polarization directions of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization directions of the two polarization states of the light beam separated from the light beam R. The first adjustment and the second adjustment are different, for example, one of the first adjustment and the second adjustment is to rotate the polarization direction of the light beam by 90°, and the other is to keep the polarization direction of the light beam unchanged.

[0398] In some examples, the first non-reciprocal polarization rotation portion 410 a , the second non-reciprocal polarization rotation portion 410 b , and the third non-reciprocal polarization rotation portion 410 c are respectively located in three optical circulators 40 .

[0399] In some examples, two of the first non-reciprocal polarization rotation portion 410 a , the second non-reciprocal polarization rotation portion 410 b , and the third non-reciprocal polarization rotation portion 410 c are located in the same optical circulator 40 , and the other one is located in a separate optical circulator 40 .

[0400] In some examples, such as Fig.19 and Fig. 20 As shown, the first non-reciprocal polarization rotation section 410a, the second non-reciprocal polarization rotation section 410b, and the third non-reciprocal polarization rotation section 410c are located in the same optical circulator 40 (the first optical circulator 40a).

[0401] The technical solution provided by the embodiment of the present disclosure is that the first optical circulator 40a includes a first non-reciprocal polarization rotation part 410a, a second non-reciprocal polarization rotation part 410b and a third non-reciprocal polarization rotation part 410c, so that one optical circulator 40 can process three light beams of different wavelength bands accordingly. In this way, the number of optical circulators 40 required to be included in the optical module is reduced, and the volume and cost of the optical module are reduced.

[0402] In some examples, such as Fig.19 and Fig. 20 As shown, the first optical circulator 40a includes a non-reciprocal polarization rotation component 41, a first polarization splitting and combining optical component 42, and a second polarization splitting and combining optical component 43. The non-reciprocal polarization rotation component 41 includes a first non-reciprocal polarization rotation part 410a, a second non-reciprocal polarization rotation part 410b, and a third non-reciprocal polarization rotation part 410c. The first polarization splitting and combining optical component 42 is located on the optical path between the first optical transmitting component 2a, the second optical transmitting component 2b, the third optical transmitting component 2c, and the non-reciprocal polarization rotation component 41, and is located on the optical path between the first optical receiving component 3a, the second optical receiving component 3b, the third optical receiving component 3c, and the non-reciprocal polarization rotation component 41. The second polarization splitting and combining optical component 43 is located on the optical path between the splitting and combining component 5 and the non-reciprocal polarization rotation component 41.

[0403] The technical solution provided by the embodiment of the present disclosure only requires a first polarization light-splitting and light-combining component 42 and a second polarization light-splitting and light-combining component 43 to realize the splitting and combining of three light beams, thereby realizing the multiplexing of polarization light-splitting and light-combining components, saving the number of polarization light-splitting and light-combining components, reducing costs, and also improving the integration density of optical devices.

[0404] In some examples, such as Fig.21As shown, the first optical circulator 40a includes two first non-reciprocal polarization rotation parts 410a, two second non-reciprocal polarization rotation parts 410b and two third non-reciprocal polarization rotation parts 410c. The two first non-reciprocal polarization rotation parts 410a are respectively used to receive light beams of two polarization states separated from the light beam of the first wavelength band, the two second non-reciprocal polarization rotation parts 410b are respectively used to receive light beams of two polarization states separated from the light beam of the second wavelength band, and the two third non-reciprocal polarization rotation parts 410c are respectively used to receive light beams of two polarization states separated from the light beam of the third wavelength band.

[0405] In some examples, such as Fig.21 As shown, the non-reciprocal polarization rotation component 41 includes a half-wave plate 411, a first Faraday rotator 412a, a second Faraday rotator 412b and a third Faraday rotator 412c. The first Faraday rotator 412 and a portion of the half-wave plate 411 form a first non-reciprocal polarization rotation portion 410a, the second Faraday rotator 412b and a portion of the half-wave plate 411 form a second non-reciprocal polarization rotation portion 410b, and the third Faraday rotator 412c and a portion of the half-wave plate 411 form a third non-reciprocal polarization rotation portion 410c. The working band of the first Faraday rotator 412a covers the first band, the working band of the second Faraday rotator 412b covers the second band, and the working band of the third Faraday rotator 412c covers the third band.

[0406] The present disclosure does not limit the arrangement of the half-wave plate 411 and the Faraday rotator 412. In some examples, such as Fig.21 As shown, the half-wave plate 411 is located on the optical path between the Faraday rotator 412 and the second polarization light-splitting and light-combining component 43. In other examples, the half-wave plate 411 is located on the optical path between the Faraday rotator 412 and the first polarization light-splitting and light-combining component 42 (eg, Fig.11 and Fig.12 shown).

[0407] The first polarization light splitting / combining component 42 and the second polarization light splitting / combining component 43 are exemplarily described below.

[0408] In some examples, such as Fig.19As shown, in the light transmission direction, the first polarization light-splitting and light-combining component 42 is used to polarization-split the light beam T of the first band, the light beam T of the second band, and the light beam T of the third band, and sends the two polarization-state light beams separated from the light beam T of the first band to the first non-reciprocal polarization rotation part 410a, sends the two polarization-state light beams separated from the light beam T of the second band to the second non-reciprocal polarization rotation part 410b, and sends the two polarization-state light beams separated from the light beam T of the third band to the third non-reciprocal polarization rotation part 410c. The second polarization light-splitting and light-combining component 43 is used to combine the two polarization-state light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam T of the first band, combine the two polarization-state light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam T of the second band, and combine the two polarization-state light beams sent by the third non-reciprocal polarization rotation part 410c into the light beam T of the third band. Afterwards, the light beam T of the first wavelength band, the light beam T of the second wavelength band and the light beam T of the third wavelength band are sent to the wavelength splitting / combining component 5 .

[0409] like Fig. 20 As shown, in the light receiving direction, the second polarization light-splitting and light-combining component 43 is used to polarization-split the light beam R of the first band, the light beam R of the second band, and the light beam R of the third band, and sends the two polarization-state light beams separated from the light beam R of the first band to the first non-reciprocal polarization rotation part 410a, sends the two polarization-state light beams separated from the light beam R of the second band to the second non-reciprocal polarization rotation part 410b, and sends the two polarization-state light beams separated from the light beam R of the third band to the third non-reciprocal polarization rotation part 410c. The first polarization light-splitting and light-combining component 42 is used to combine the two polarization-state light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam R of the first band, combine the two polarization-state light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam R of the second band, and combine the two polarization-state light beams sent by the third non-reciprocal polarization rotation part 410c into the light beam R of the third band. Afterwards, a light beam R of the first wavelength band is sent to the first light receiving component 3a, a light beam R of the second wavelength band is sent to the second light receiving component 3b, and a light beam R of the third wavelength band is sent to the third light receiving component 3c.

[0410] The implementation of the wave splitter / combiner component 5 is described below by way of example.

[0411] In some examples, such as Fig.19 and Fig. 20 As shown, the splitter-combiner assembly 5 includes a first splitter-combiner assembly 5a and a second splitter-combiner assembly 5b. Fig.19As shown, in the light transmission direction, the first splitter-combiner component 5a combines the light beam T of the second wavelength band and the light beam T of the third wavelength band sent by the second polarization splitter-combiner component 43, and sends the combined light beam to the second splitter-combiner component 5b. The second splitter-combiner component 5b combines the combined light beam with the light beam T of the first wavelength band, and sends the combined light beam through the single-fiber bidirectional optical interface 6. Fig. 20 As shown, in the light receiving direction, the second splitter / combiner assembly 5b splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam R of the first wavelength band and a light beam R of the second wavelength band and the third wavelength band, sends the light beam R of the first wavelength band to the second polarization splitter / combiner assembly 43, and sends the light beam R of the second wavelength band and the third wavelength band to the first splitter / combiner assembly 5a. The first splitter / combiner assembly 5a splits the received light beam into a light beam R of the second wavelength band and a light beam R of the third wavelength band, and sends the light beam R of the second wavelength band and the light beam R of the third wavelength band to the second polarization splitter / combiner assembly 43.

[0412] In some examples, such as Fig.19 and Fig. 20 As shown, the first splitter / combiner assembly 5a and the second splitter / combiner assembly 5b both include a filter 51 and a reflective element 52. The specific structures of the first splitter / combiner assembly 5a and the second splitter / combiner assembly 5b are described in the above content and will not be repeated here.

[0413] (3) In some examples, such as Fig. 22 - Fig.26 As shown, the plurality of light emitting components 2 include a first light emitting component 2a, a second light emitting component 2b, a third light emitting component 2c and a fourth light emitting component 2d. The plurality of light receiving components 3 include a first light receiving component 3a, a second light receiving component 3b, a third light receiving component 3c and a fourth light receiving component 3d.

[0414] like Fig.23 As shown, in the light sending direction, the first optical emitting component 2a sends a light beam T of the first wavelength band to the optical ring device 4 (the first optical ring 40a and the second optical ring 40b in the figure). The second optical emitting component 2b sends a light beam T of the second wavelength band to the optical ring device 4. The third optical emitting component 2c sends a light beam T of the third wavelength band to the optical ring device 4. The fourth optical emitting component 2d sends a light beam T of the fourth wavelength band to the optical ring device 4. After the optical ring device 4 processes the light beam T of the first wavelength band, the light beam T of the second wavelength band, the light beam T of the second wavelength band and the light beam T of the fourth wavelength band, it sends the light beam T of the first wavelength band, the light beam T of the second wavelength band, the light beam T of the third wavelength band and the light beam T of the fourth wavelength band to the splitter-combiner component 5. The splitter-combiner component 5 combines the light beam T of the first wavelength band, the light beam T of the second wavelength band, the light beam T of the third wavelength band and the light beam T of the fourth wavelength band, and sends them to the outside through the single-fiber bidirectional optical interface 6.

[0415] like Fig.24 As shown, in the light receiving direction, the wavelength splitter / combiner component 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam R of the first wavelength band, a light beam R of the second wavelength band, a light beam R of the third wavelength band and a light beam R of the fourth wavelength band, and sends the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band and the light beam R of the fourth wavelength band to the optical ring device 4. After processing the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band and the light beam R of the fourth wavelength band, the optical ring device 4 sends the light beam R of the first wavelength band to the first optical receiving component 3a, sends the light beam R of the second wavelength band to the second optical receiving component 3b, sends the light beam R of the third wavelength band to the third optical receiving component 3c, and sends the light beam R of the fourth wavelength band to the fourth optical receiving component 3d.

[0416] In some examples, in order to enable the light ring device 4 to effectively process the light beams in the first wavelength band, the light beams in the second wavelength band, the light beams in the third wavelength band, and the light beams in the fourth wavelength band, as shown in FIG. Fig.23 and Fig.24 As shown, the light ring device 4 includes a first non-reciprocal polarization rotation part 410a, a second non-reciprocal polarization rotation part 410b, a third non-reciprocal polarization rotation part 410c and a fourth non-reciprocal polarization rotation part 410d. The working band of the first non-reciprocal polarization rotation part 410a covers the first band, and is used to adjust the polarization direction of the light beam in the first band. The working band of the second non-reciprocal polarization rotation part 410b covers the second band, and is used to adjust the polarization direction of the light beam in the second band. The working band of the third non-reciprocal polarization rotation part 410c covers the third band, and is used to adjust the polarization direction of the light beam in the third band. The working band of the fourth non-reciprocal polarization rotation part 410d covers the fourth band, and is used to adjust the polarization direction of the light beam in the fourth band.

[0417] The fourth non-reciprocal polarization rotation part 410d is located on the transmission path of the two polarization states of the light beam separated from the light beam of the fourth band, and is used to make a first adjustment to the polarization directions of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization directions of the two polarization states of the light beam separated from the light beam R. The first adjustment and the second adjustment are different, for example, one of the first adjustment and the second adjustment is to rotate the polarization direction of the light beam by 90°, and the other is to keep the polarization direction of the light beam unchanged.

[0418] In some examples, the first non-reciprocal polarization rotation portion 410 a , the second non-reciprocal polarization rotation portion 410 b , the third non-reciprocal polarization rotation portion 410 c , and the fourth non-reciprocal polarization rotation portion 410 d are respectively located in four optical circulators 40 .

[0419] In some examples, three of the first non-reciprocal polarization rotation portion 410 a , the second non-reciprocal polarization rotation portion 410 b , the third non-reciprocal polarization rotation portion 410 c , and the fourth non-reciprocal polarization rotation portion 410 d are located in the same optical circulator 40 , and the other one is located in a separate optical circulator 40 .

[0420] In some examples, such as Fig.23 and Fig.24 As shown, the first non-reciprocal polarization rotation section 410a and the second non-reciprocal polarization rotation section 410b are located in the first optical circulator 40a, and the third non-reciprocal polarization rotation section 410c and the fourth non-reciprocal polarization rotation section 410d are located in the second optical circulator 40b.

[0421] The technical solution provided by the embodiment of the present disclosure is that the first optical circulator 40a includes the first non-reciprocal polarization rotation part 410a and the second non-reciprocal polarization rotation part 410b, and the second optical circulator 40b includes the third non-reciprocal polarization rotation part 410c and the fourth non-reciprocal polarization rotation part 410d, so that the two optical circulators 40 can process four light beams of different wavelength bands accordingly. In this way, the number of optical circulators 40 required to be included in the optical module is reduced, and the volume and cost of the optical module are reduced.

[0422] The structure of the first optical circulator 40a refers to the above content and will not be described again.

[0423] In some examples, such as Fig.23 and Fig.24 As shown, the second optical circulator 40b includes a non-reciprocal polarization rotation component 41, a first polarization splitting and combining optical component 42, and a second polarization splitting and combining optical component 43. The non-reciprocal polarization rotation component 41 includes a third non-reciprocal polarization rotation part 410c and a fourth non-reciprocal polarization rotation part 410d. The first polarization splitting and combining optical component 42 is located on the optical path between the third optical transmitting component 2c, the fourth optical transmitting component 2d, and the non-reciprocal polarization rotation component 41, and is located on the optical path between the third optical receiving component 3c, the fourth optical receiving component 3d, and the non-reciprocal polarization rotation component 41. The second polarization splitting and combining optical component 43 is located on the optical path between the splitting and combining component 5 and the non-reciprocal polarization rotation component 41.

[0424] In some examples, such as Fig.23 and Fig.24As shown, the non-reciprocal polarization rotation component 41 of the second optical circulator 40b includes two third non-reciprocal polarization rotation parts 410c and two fourth non-reciprocal polarization rotation parts 410d. The third non-reciprocal polarization rotation parts 410c and the fourth non-reciprocal polarization rotation parts 410d are arranged alternately. The two third non-reciprocal polarization rotation parts 410c are respectively used to receive the two polarization state light beams separated from the light beam of the third wavelength band, and the two fourth non-reciprocal polarization rotation parts 410d are respectively used to receive the two polarization state light beams separated from the light beam of the fourth wavelength band.

[0425] In some examples, such as Fig.23 and Fig.24 As shown, the non-reciprocal polarization rotation component 41 of the second optical circulator 40b includes a half-wave plate 411, a third Faraday rotator 412c, and a fourth Faraday rotator 412d. The third Faraday rotator 412c and a portion of the half-wave plate 411 form a third non-reciprocal polarization rotation portion 410c, and the fourth Faraday rotator 412d and a portion of the half-wave plate 411 form a fourth non-reciprocal polarization rotation portion 410d.

[0426] In some examples, such as Fig.23 As shown, in the light transmission direction, the first polarization light splitting / combining component 42 of the second optical circulator 40b is used to polarization-split the light beam T of the third band and the light beam T of the fourth band, and sends the two polarization-state light beams separated from the light beam T of the third band to the third non-reciprocal polarization rotation part 410c, and sends the two polarization-state light beams separated from the light beam T of the fourth band to the fourth non-reciprocal polarization rotation part 410d. The second polarization light splitting / combining component 43 is used to combine the two polarization-state light beams sent by the third non-reciprocal polarization rotation part 410c into the light beam T of the third band, and combine the two polarization-state light beams sent by the fourth non-reciprocal polarization rotation part 410d into the light beam T of the fourth band, and send the light beam T of the third band and the light beam T of the fourth band to the splitting / combining component 5.

[0427] like Fig.24 As shown, in the light receiving direction, the second polarization splitting / combining optical component 43 of the second optical circulator 40b is used to polarization split the light beam R of the third band and the light beam R of the fourth band, and send the two polarization states of the light beam R of the third band to the third non-reciprocal polarization rotation part 410c, and send the two polarization states of the light beam R of the fourth band to the fourth non-reciprocal polarization rotation part 410d. The first polarization splitting / combining optical component 42 is used to combine the two polarization states of the light beams sent by the third non-reciprocal polarization rotation part 410c into the light beam R of the third band, combine the two polarization states of the light beams sent by the fourth non-reciprocal polarization rotation part 410d into the light beam R of the fourth band, send the light beam R of the third band to the third optical receiving component 3c, and send the light beam R of the fourth band to the fourth optical receiving component 3d.

[0428] The implementation of the wave splitter / combiner component 5 is described below by way of example.

[0429] In some examples, such as Fig.23 and Fig.24 As shown, the splitter-combiner assembly 5 includes two first splitter-combiner assemblies 5a and a second splitter-combiner assemblies 5b. Fig.23 As shown, in the light transmission direction, a first splitter-combiner component 5a combines the light beam T of the first wavelength band and the light beam T of the second wavelength band sent by the first optical circulator 40a, and sends the combined light beam to the second splitter-combiner component 5b. Another first splitter-combiner component 5a combines the light beam T of the third wavelength band and the light beam T of the fourth wavelength band sent by the second optical circulator 40b, and sends the combined light beam to the second splitter-combiner component 5b. The second splitter-combiner component 5b combines the two received light beams and sends the combined light beam through the single-fiber bidirectional optical interface 6. Fig.24 As shown, in the light receiving direction, the second splitter / combiner assembly 5b splits the light beam received through the single-fiber bidirectional optical interface 6 into two light beams, and sends the two light beams to the two first splitter / combiner assemblies 5a respectively. One first splitter / combiner assembly 5a splits the received light beam into a light beam R of a first wavelength band and a light beam R of a second wavelength band, and sends the light beam R of the first wavelength band and the light beam R of the second wavelength band to the first optical circulator 40a. The other first splitter / combiner assembly 5a splits the received light beam into a light beam R of a third wavelength band and a light beam R of a fourth wavelength band, and sends the light beam R of the third wavelength band and the light beam R of the fourth wavelength band to the second optical circulator 40b.

[0430] In some examples, such as Fig.23 and Fig.24 As shown, the first splitter / combiner assembly 5a and the second splitter / combiner assembly 5b both include a filter 51 and a reflective element 52. The specific structures of the first splitter / combiner assembly 5a and the second splitter / combiner assembly 5b are described in the above content and will not be repeated here.

[0431] In some examples, such as Fig.25 and Fig.26 As shown, the two first wave splitter / combiner components 5a are integrated with the first optical circulator 40a and the second optical circulator 40b respectively.

[0432] It should be noted that when the transmission light beam sent out by the single-fiber bidirectional optical interface 6 of the optical module is transmitted to the joint between the single-fiber bidirectional optical interface 6 and the optical fiber, part of the light beam will be reflected by the end face of the optical fiber to form a reflected light beam. Since the transmission light beam and the receiving light beam of the optical module use the same wavelength band, the reflected light beam will be incident on the corresponding optical receiving component 3 together with the receiving light beam, that is, the reflected light beam will interfere with the receiving light beam.

[0433] To solve this technical problem, in some examples, such as Fig. 27 As shown, the optical module also includes a mode filter 7. The mode filter 7 is located on the optical path between the wave splitter / combiner component 5 and the single-fiber bidirectional optical interface 6. The mode filter 7 is used to filter the reflected light beam reflected back from the transmitted light beam, thereby reducing the interference of the reflected light beam on the received light beam and improving the reliability of the optical module in receiving the optical signal.

[0434] In some examples, the mode filter 7 includes a cladding layer and a core layer.

[0435] After adopting the above technical solution, the single-fiber wavelength capacity of the optical module is expanded, so that the light beam transmitted by the single-fiber bidirectional optical interface 6 of the optical module can carry more optical signals. This requires that the electrical connection component 1 of the optical module can transmit more optical signals. Below, the electrical connection component 1 of the optical module provided in the embodiment of the present disclosure is exemplarily described.

[0436] In some examples, such as Fig.28 - Fig.54 As shown, the electrical connection component 1 includes a plurality of gold finger connectors 11, and the plurality of gold finger connectors 11 are respectively used to connect with a plurality of female connectors in the communication device. In this way, on the one hand, the number of electrical signals that can be transmitted by the electrical connection component 1 is increased, so that the electrical connection component 1 of the optical module can support the single-fiber bidirectional optical interface 6 to transmit a larger number of optical signals.

[0437] On the other hand, since the number of electrical signals transmitted by the existing female connector is small, by setting up an electrical connection component 1 to dock with multiple female connectors, the communication device can send a larger number of transmission electrical signals to the optical module, and receive a larger number of reception electrical signals sent by the optical module, so that the communication device can support the single-fiber bidirectional optical interface 6 to transmit a larger number of optical signals.

[0438] In some examples, such as Fig.28 - Fig.30 , Fig.35 - Fig.36 , Fig.39 , Fig.44 , Fig.47 and Fig.52 As shown in any of the figures in the figure, each of the multiple gold finger connectors 11 is electrically connected to an optical transmitting component 2 and an optical receiving component 3. That is, one light beam R and one light beam T correspond to one gold finger connector 11. In this way, the communication device can uniformly control multiple lasers 211 in each optical transmitting component 2 and multiple detectors 311 in each optical receiving component 3 through one female connector.

[0439] The embodiment of the present disclosure does not limit the number and arrangement of the gold finger connectors 11 , and an exemplary description is given below.

[0440] In some examples, such as Fig.31 , Fig.32 and Fig.37 As shown, there are two gold finger connectors 11, and the two gold finger connectors 11 are arranged horizontally. Fig.33 , Fig.34 and Fig.38 As shown, two gold finger connectors 11 are arranged vertically.

[0441] In some examples, such as Fig.40 , Fig.41 and Fig.45 As shown, there are three gold finger connectors 11, and the three gold finger connectors 11 are arranged horizontally. Fig.42 , Fig.43 and Fig.46 As shown, three gold finger connectors 11 are arranged vertically.

[0442] In some examples, such as Fig.48 , Fig.49 and Fig.53 As shown, there are four gold finger connectors 11, and the four gold finger connectors 11 are arranged horizontally. Fig.50 , Fig.51 and Fig.54 As shown, the four gold finger connectors 11 are arranged in two horizontal and two vertical positions.

[0443] Each optical module in the related art is generally inserted into a port of the optical cage. However, since the electrical connection assembly 1 of the optical module provided in the embodiment of the present disclosure includes multiple gold finger connectors 11, the optical module provided in the embodiment of the present disclosure needs to be inserted into multiple ports of the optical cage. In order to enable the optical module provided in the embodiment of the present disclosure to be applied to existing communication devices, in some examples, such as Fig.29 - Fig.34 , Fig.39 - Fig.43 and Fig.47 - Fig.51 As shown, the optical module includes an optical interface part 8 and multiple electrical plug parts 9, the optical interface part 8 has a single-fiber bidirectional optical interface 6, and multiple gold finger connectors 11 are respectively located in the multiple electrical plug parts 9. The multiple electrical plug parts 9 are arranged at intervals, and each electrical plug part 9 is used to be inserted into a port of the optical cage of the communication device.

[0444] In this way, each electrical plug-in portion 9 of the optical module can be inserted into a port of the optical cage of the communication device, so that the optical module provided by the embodiment of the present disclosure can be applied to the existing communication device, reducing the application cost. On the other hand, the volume of the optical module including multiple electrical plug-in portions 9 becomes larger, so that the optical module can accommodate the newly added optical devices and electrical devices due to the expansion of the single-fiber wavelength capacity.

[0445] In some examples, such as Fig.29 - Fig.30 , Fig.39 and Fig.47 As shown, each electrical plug part 9 includes a light emitting component 2 and a light receiving component 3. In this way, the gold finger connector 11 in the electrical plug part 9 is conveniently electrically connected to a light emitting component 2 and a light receiving component 3.

[0446] In some examples, such as Fig.29 - Fig.30 , Fig.35 - Fig.36 , Fig.39 , Fig.44 , Fig.47 and Fig.52 As shown, the optical ring device 4, the wave splitter / combiner assembly 5 and the single-fiber bidirectional optical interface 6 are all located in the optical interface portion 8. The optical transmitting assembly 2, the optical receiving assembly 3 and the optical ring device 4 are coupled in a spatial optical manner or connected via optical fibers.

[0447] The number and arrangement of the electrical plug-in parts 9 are the same as the number and arrangement of the gold finger connectors 11. An exemplary description is given below.

[0448] In some examples, such as Fig.31 and Fig.32 As shown, there are two electrical plug-in parts 9, which are arranged horizontally, and the two electrical plug-in parts 9 are used to be inserted into two horizontal rows of ports of the optical cage. Fig.33 and Fig.34 As shown, the two electrical plug-in connectors 9 are arranged longitudinally, and the two electrical plug-in connectors 9 are used to be inserted into the ports of the two longitudinal rows of the optical cage.

[0449] In some examples, such as Fig.40 and Fig.41 As shown, there are three electrical plug-in parts 9, which are arranged horizontally, and the three electrical plug-in parts 9 are used to be inserted into the three horizontal rows of ports of the optical cage. Fig.42 and Fig.43 As shown, three electrical plug connectors 9 are arranged longitudinally, and the three electrical plug connectors 9 are used to be inserted into the ports in three longitudinal rows of the light cage.

[0450] In some examples, such as Fig.48 and Fig.49 As shown, there are four electrical plug-in parts 9, which are arranged horizontally, and the four electrical plug-in parts 9 are used to be inserted into the four horizontal ports of the optical cage. Fig.50 and Fig.51 As shown, the four electrical plug-in connectors 9 are arranged in two horizontal and two vertical directions, and the four electrical plug-in connectors 9 are used to be inserted into the four ports of the optical cage, which are arranged in two horizontal and two vertical directions.

[0451] The embodiment of the present disclosure does not limit the shape of the electrical plug-in portion 9. In some examples, such as Fig.31 - Fig.34 , Fig.40 - Fig.43 , Fig.48 - Fig.51 As shown, the shape of the electrical plug part 9 is consistent with the shape of a quad small formfactor pluggable (QSFP) packaged optical module, or, the electrical plug part 9 can be inserted into a port of an optical cage that meets the QSFP packaging requirements.

[0452] Among them, the QSFP-packaged optical module can transmit four transmission electrical signals and four reception electrical signals. When there are two electrical plug-in parts 9, the electrical connection component 1 can transmit eight transmission electrical signals and eight reception electrical signals, and the optical module can complete the transmission and reception of eight optical signals. When there are three electrical plug-in parts 9, the electrical connection component 1 can transmit twelve transmission electrical signals and twelve reception electrical signals, and the optical module can complete the transmission and reception of twelve optical signals. When there are four electrical plug-in parts 9, the electrical connection component 1 can transmit sixteen transmission electrical signals and sixteen reception electrical signals, and the optical module can complete the transmission and reception of sixteen optical signals.

[0453] In other examples, such as Fig.35 - Fig.38 , Fig.44 - Fig.46 and Fig.52 - Fig.54 As shown, the above-mentioned multiple electrical plug-in parts 9 are integrated together. Alternatively, the optical module includes an optical interface part 8 and an electrical plug-in part 9, and multiple gold finger connectors 11 are located in the electrical plug-in part 9. In this way, the integrity of the optical module can be improved.

[0454] It should be noted that setting multiple gold finger connectors 11 in the same electrical plug-in part 9 may cause the electrical plug-in part 9 to be larger in size and unable to be inserted into one port of the optical cage. In this case, the communication device needs to be improved. In some examples, in order to minimize the improvement of the communication device, the electrical plug-in part 9 is provided for being inserted into the combined port of the optical cage. The combined port refers to a port formed after at least two ports are connected after at least one partition in the optical cage is removed. In this way, the required improvements to the communication device can be reduced (only the optical cage needs to be improved), and the application cost of the optical module is reduced.

[0455] In some examples, for Fig.37 The optical module shown in the figure has the combined ports formed by removing the vertical partition in the middle from two horizontal rows of ports.

[0456] In some examples, for Fig.38 The optical module shown in the figure has a combined port formed by removing a horizontal partition in the middle of two vertical rows of ports.

[0457] In some examples, for Fig.45 The optical module shown in the figure has merged ports into three horizontal rows of ports, which are formed by removing two vertical partitions in the middle.

[0458] In some examples, for Fig.46 The optical module shown in the figure has merged ports into three vertical rows of ports formed by removing two horizontal partitions in the middle.

[0459] In some examples, for Fig.53 The optical module shown in the figure has merged ports into four horizontal rows of ports, which are formed by removing three horizontal partitions in the middle.

[0460] In some examples, for Fig.54 The optical module shown in the figure has four ports, two horizontal and two vertical, which are formed by removing the crossed horizontal partitions and vertical partitions.

[0461] In addition to the above-mentioned technical solution of setting the electrical connection component 1 to include a plurality of gold finger connectors 11, in other examples, such as Fig.55 As shown, the optical module includes a gold finger connector 11 , and the gold finger connector 11 is electrically connected to the plurality of optical transmitting components 2 and the plurality of optical receiving components 3 .

[0462] In some examples, in order to enable the gold finger connector 11 to transmit a greater number of electrical signals, such as Fig.57 and Fig.59 As shown, the gold finger connector 11 is provided with two rows of high-speed signal pins 112. The high-speed signal pins 112 are used to transmit electrical signals to multiple optical transmitting components 2, and to transmit received electrical signals generated by multiple optical receiving components 3 to the communication device. In this way, the number of electrical signals transmitted by the gold finger connector 11 is increased, so that the electrical connection component 1 can support the optical module to transmit a larger number of optical signals.

[0463] In some examples, such as Fig.57 and Fig.59 As shown, the two rows of high-speed signal pins 112 are located on the same side of the gold finger connector 11 , and the two rows of high-speed signal pins 112 are arranged in sequence along the mating direction of the gold finger connector 11 .

[0464] In some examples, such as Fig.59As shown, the two rows of high-speed signal pins 112 are used to transmit sixteen transmission electrical signals to multiple optical transmitting components 2, and to transmit sixteen reception electrical signals generated by multiple optical receiving components 3 to the communication device. Of course, in other examples, not all pins in the two rows of high-speed signal pins 112 are enabled.

[0465] In addition to the high-speed signal pins 112 , the gold finger connector 11 also includes at least one row of functional signal pins 111 . The functional signal pins 111 are used to implement basic functions such as power supply, but are not used to transmit and receive electrical signals.

[0466] In some examples, since the purpose of the embodiments of the present disclosure is only to increase the number of transmitted electrical signals and received electrical signals transmitted by the gold finger connector 11, if the existing row of functional signal pins 111 can support the two rows of high-speed signal pins 112 (for example, the power supply capacity can support the two rows of high-speed signal pins 112), then Fig.58 As shown, the function signal pins 111 do not need to be changed and remain in one row. Fig.58 The figure shows a row of function signal pins 111 that conform to the C form factor pluggable (CFP) 2 (ie CFP2) pin definition. The function signal pins 111 and the high-speed signal pins 112 are located on different sides of the gold finger connector 11.

[0467] In other examples, if the existing row of functional signal pins 111 cannot support two rows of high-speed signal pins 112 (for example, the power supply capacity of a single row of functional signal pins 111 is insufficient), or in order to improve the stability of power supply, such as Fig.60 As shown, there are two rows of function signal pins 111. For example, for the newly added row of function signal pins 111, only the power supply related signal pins are enabled ( Fig.60 3.3V and 3.3V-GND in the ).

[0468] It should be noted that after the gold finger connector 11 is configured to have two rows of high-speed signal pins 112 , the corresponding female connector on the communication device also needs to be adaptively designed to be able to connect to the two rows of high-speed signal pins 112 .

[0469] In other examples, such as Fig.61 - Fig.63 As shown, the optical module includes two gold finger connectors 11, and the two gold finger connectors 11 are located in the same electrical interface of the optical module. Fig.63 As shown, the two gold finger connectors 11 are arranged along the thickness direction of the optical module. In this way, the number of electrical signals transmitted by the electrical connection component 1 can be increased, so that the electrical connection component 1 supports the optical module to transmit more optical signals.

[0470] In some examples, the two gold finger connectors 11 are used to transmit sixteen transmission electrical signals to the multiple optical transmitting components 2, and are used to transmit sixteen reception electrical signals generated by the multiple optical receiving components 3 to the communication device.

[0471] In the case where the optical module has two optical emitting components 2 and two optical receiving components 3 , each gold finger connector 11 is configured to be electrically connected to one optical emitting component 2 and one optical receiving component 3 .

[0472] For the case where the optical module has three optical transmitting components 2 and three optical receiving components 3, in some examples, such as Fig.61 As shown, a gold finger connector 11 is provided to be electrically connected to one optical transmitting component 2 and one optical receiving component 3 , and another gold finger connector 11 is provided to be electrically connected to another two optical transmitting components 2 and another two optical receiving components 3 .

[0473] For the case where the optical module has four optical transmitting components 2 and four optical receiving components 3, in some examples, such as Fig.62 As shown, a gold finger connector 11 is provided to be electrically connected to two optical emitting components 2 and two optical receiving components 3 , and another gold finger connector 11 is provided to be electrically connected to another two optical emitting components 2 and another two optical receiving components 3 .

[0474] The embodiments of the present disclosure do not limit the packaging form of the optical module. In some examples, such as Fig.56 , Fig.57 and Fig.63 As shown, the optical module adopts CFP package or CFP2 package. Since the volume of the optical module in CFP or CFP2 package form is larger, the overall form of these two types of optical modules does not need to be changed, and the newly added optical devices and electrical devices can also be accommodated.

[0475] In other examples, the optical module uses a QSFP package or a quad small form factor pluggable-double density (QSFP-DD) package.

[0476] It should be noted that in the embodiments of the present disclosure, the optical module adopts a certain package, which means that the size of the optical module meets the standard of the package, or that the optical module can be inserted into the port of the optical cage that meets the standard of the package. However, the pin definition of the gold finger connector 11 of the optical module may not meet the standard of the package.

[0477] In the right Figure 1After the first optical module 200 in the communication system shown is improved, the optical splitter / combiner 300 connected to the first optical module 200 also needs to be improved accordingly. The optical splitter / combiner 300 provided in the embodiment of the present disclosure is exemplarily described below.

[0478] like Fig.64 As shown, the optical splitter / combiner device 300 includes an optical ring device 4 , a splitter / combiner assembly 5 , a single-fiber bidirectional optical interface 6 , multiple optical input interfaces 301 , multiple optical output interfaces 302 , multiple combiner groups 22 and multiple demultiplexer groups 32 .

[0479] When the optical splitter / combiner 300 is applied to Figure 1 In the communication system shown, the single-fiber bidirectional optical interface 6 of the optical splitter / combiner 300 is connected to the single-fiber bidirectional optical interface 6 of the first optical module 200 through an optical fiber. The multiple optical input interfaces 301 of the optical splitter / combiner 300 are respectively connected to the optical transmission ports of the multiple second optical modules 500 through optical fibers, and the multiple optical output interfaces 302 of the optical splitter / combiner 300 are respectively connected to the optical receiving ports of the multiple second optical modules 500 through optical fibers.

[0480] In the first transmission direction of light, the splitter / combiner assembly 5 splits the light beam received through the single-fiber bidirectional optical interface 6 (the light beam is sent by the first optical module 200) into multiple light beams T of different wavelength bands, and sends multiple light beams T of different wavelength bands to the optical ring device 4. The optical ring device 4 sends one light beam T to each splitter group 32. Each splitter group 32 splits the received light beam T into multiple light beams, and sends the split light beams to multiple second optical modules 500 through multiple optical output interfaces 302. The first transmission direction of light is consistent with the light sending direction of the first optical module 200.

[0481] In the second transmission direction of light, each combiner group 22 combines multiple light beams (sent by multiple second optical modules 500) received through multiple optical input interfaces 301 into one light beam R, and sends the light beam R to the optical ring device 4. The optical ring device 4 receives multiple light beams R of different wavelengths, and sends the multiple light beams R of different wavelengths to the splitter-combiner component 5. The splitter-combiner component 5 combines the multiple light beams R, and sends the combined light beam to the first optical module 200 through the single-fiber bidirectional optical interface 6. The second transmission direction of light is consistent with the light receiving direction of the first optical module 200.

[0482] The technical solution provided by the embodiment of the present disclosure is that what are transmitted in the optical ring device 4 of the optical splitter and combiner 300 are multiple light beams of different wavelength bands, and the transmission paths of the multiple light beams in the optical ring device 4 are different. Therefore, the optical ring device 4 can process the multiple light beams separately. For example, different magnetic fields are applied to the transmission paths of the multiple light beams of different wavelength bands. In this way, although the wavelength range of each light beam still cannot exceed the upper limit wavelength range, the wavelength range of the light beam after the multiple light beams are combined, that is, the wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface 6 can exceed the upper limit wavelength range. It can be seen that the embodiment of the present disclosure expands the wavelength range of the light beam that can be processed by the optical ring device 4 by setting the optical ring device 4 to process the multiple light beams of different wavelength bands separately, thereby expanding the single-fiber wavelength capacity of the optical splitter and combiner 300, so that the optical splitter and combiner 300 can be used in conjunction with the above-mentioned first optical module 200.

[0483] Assuming that the wavelength range of each light beam incident to the light ring device 4 is the upper wavelength range, and there are N light paths incident to the light ring device 4, the wavelength range of the light beam that can be processed by the light ring device 4 is equal to N times the upper wavelength range.

[0484] For the wavelength ranges of the light beam T, the light beam R, and the light beam transmitted by the single-fiber bidirectional optical interface 6, please refer to the above content and will not be repeated here.

[0485] For the implementation of the combiner group 22, the splitter group 32 and the optical ring device 4, please refer to the above content and will not be described in detail here.

[0486] In the following, the structure of the optical ring device 4 and the sending optical path and the receiving optical path of the optical splitter device 300 are exemplarily described in combination with the specific numbers of the combiner group 22 and the splitter group 32 .

[0487] (1) In some examples, such as Fig.65 and Fig.66 As shown, the plurality of combiner groups 22 include a first combiner group 22a and a second combiner group 22b. The plurality of splitter groups 32 include a first splitter group 32a and a second splitter group 32b. The plurality of optical input interfaces 301 include a plurality of first optical input interfaces 301a and a plurality of second optical input interfaces 301b. The plurality of optical output interfaces 302 include a plurality of first optical output interfaces 302a and a plurality of second optical output interfaces 302b.

[0488] like Fig.67 And refer to Fig.66As shown, in the first transmission direction of light, the splitter / combiner assembly 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam T of the first wavelength band and a light beam T of the second wavelength band, and sends the light beam T of the first wavelength band and the light beam T of the second wavelength band to the optical ring device 4 (the first optical ring device 40a in the figure). The optical ring device 4 sends the light beam T of the first wavelength band to the first splitter group 32a, and sends the light beam T of the second wavelength band to the second splitter group 32b. The first splitter group 32a splits the light beam T of the first wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple first optical output interfaces 302a respectively. The second splitter group 32b splits the light beam T of the second wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple second optical output interfaces 302b respectively.

[0489] like Fig.68 And refer to Fig.66 As shown, in the second transmission direction of light, the first combiner group 22a combines the multiple light beams input from the multiple first optical input interfaces 301a into a light beam R of the first wavelength band, and sends the light beam R of the first wavelength band to the optical ring device 4. The second combiner group 22b combines the multiple light beams input from the multiple second optical input interfaces 301b into a light beam R of the second wavelength band, and sends the light beam R of the second wavelength band to the optical ring device 4. The optical ring device 4 sends the light beam R of the first wavelength band and the light beam R of the second wavelength band to the splitter-combiner component 5. The splitter-combiner component 5 combines the light beam R of the first wavelength band and the light beam R of the second wavelength band, and sends the combined light beam to the outside through the single-fiber bidirectional optical interface 6.

[0490] In some examples, in order to enable the light ring device 4 to effectively process both the light beam of the first wavelength band and the light beam of the second wavelength band, as shown in FIG. Fig.67 and Fig.68 As shown, the optical ring device 4 includes a first non-reciprocal polarization rotation part 410a and a second non-reciprocal polarization rotation part 410b. The working band of the first non-reciprocal polarization rotation part 410a covers the first band, and is used to adjust the polarization direction of the light beam in the first band. The working band of the second non-reciprocal polarization rotation part 410b covers the second band, and is used to adjust the polarization direction of the light beam in the second band.

[0491] The first non-reciprocal polarization rotation part 410a is located on the transmission path of the two polarization states of the light beam separated from the light beam of the first wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The second non-reciprocal polarization rotation part 410b is located on the transmission path of the two polarization states of the light beam separated from the light beam of the second wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The first adjustment and the second adjustment are different, for example, one of the first adjustment and the second adjustment is to rotate the polarization direction of the light beam by 90°, and the other is to keep the polarization direction of the light beam unchanged.

[0492] In some examples, the first optical circulator 40a includes a first non-reciprocal polarization rotating portion 410a, and the second optical circulator 40b includes a second non-reciprocal polarization rotating portion 410b. Fig.65 As shown, in the first transmission direction of light, the first optical circulator 40a is used to receive the light beam T of the first wavelength band from the splitter-combiner assembly 5, and send the light beam T of the first wavelength band to the first splitter group 32a. The second optical circulator 40b is used to receive the light beam T of the second wavelength band from the splitter-combiner assembly 5, and send the light beam T of the second wavelength band to the second splitter group 32b. In the second transmission direction of light, the first optical circulator 40a is used to receive the light beam R of the first wavelength band from the first combiner group 22a, and send the light beam R of the first wavelength band to the splitter-combiner assembly 5. The second optical circulator 40b is used to receive the light beam R of the second wavelength band from the second combiner group 22b, and send the light beam R of the second wavelength band to the splitter-combiner assembly 5.

[0493] In other examples, such as Fig.67 and Fig.68 As shown, the first non-reciprocal polarization rotation section 410a and the second non-reciprocal polarization rotation section 410b are located in the same optical circulator 40 (the first optical circulator 40a). Fig.67 As shown, in the first transmission direction of light, the first optical circulator 40a is used to receive the light beam T of the first wavelength band and the light beam T of the second wavelength band from the wave splitter / combiner assembly 5, send the light beam T of the first wavelength band to the first wave splitter group 32a, and send the light beam T of the second wavelength band to the second wave splitter group 32b. Fig.68 As shown, in the second transmission direction of light, the first optical circulator 40a is used to receive the light beam R of the first band from the first combiner group 22a, receive the light beam R of the second band from the second combiner group 22b, and send the light beam R of the first band and the light beam R of the second band to the splitter-combiner component 5.

[0494] In some examples, such as Fig.67 and Fig.68As shown, the first optical circulator 40a includes a non-reciprocal polarization rotation component 41, a first polarization light splitting and combining component 42, and a second polarization light splitting and combining component 43. The non-reciprocal polarization rotation component 41 includes a first non-reciprocal polarization rotation part 410a and a second non-reciprocal polarization rotation part 410b. The first polarization light splitting and combining component 42 is located on the optical path between the wave splitting and combining component 5 and the non-reciprocal polarization rotation component 41. The second polarization light splitting and combining component 43 is located on the optical path between the first wave combiner group 22a, the second wave combiner group 22b, and the non-reciprocal polarization rotation component 41, and is located on the optical path between the first wave splitter group 32a, the second wave splitter group 32b, and the non-reciprocal polarization rotation component 41.

[0495] For the implementation and arrangement of the first non-reciprocal polarization rotation portion 410a and the second non-reciprocal polarization rotation portion 410b, please refer to the above content and will not be repeated here.

[0496] In some examples, such as Fig.67 As shown, in the first transmission direction of light, the first polarization light-splitting and light-combining component 42 is used to polarization-split the light beam T of the first band and the light beam T of the second band, and send the two polarization states of the light beam T of the first band to the first non-reciprocal polarization rotation part 410a, and send the two polarization states of the light beam T of the second band to the second non-reciprocal polarization rotation part 410b. The second polarization light-splitting and light-combining component 43 is used to combine the two polarization states of the light beam sent by the first non-reciprocal polarization rotation part 410a into the light beam T of the first band, combine the two polarization states of the light beam sent by the second non-reciprocal polarization rotation part 410b into the light beam T of the second band, send the light beam T of the first band to the first splitter group 32a, and send the light beam T of the second band to the second splitter group 32b.

[0497] like Fig.68 As shown, in the second transmission direction of light, the second polarization light splitting / combining component 43 is used to polarization-split the light beam R of the first band and the light beam R of the second band, and sends the two polarization states of the light beam R separated from the light beam R of the first band to the first non-reciprocal polarization rotation part 410a, and sends the two polarization states of the light beam R separated from the light beam R of the second band to the second non-reciprocal polarization rotation part 410b. The first polarization light splitting / combining component 42 is used to combine the two polarization states of the light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam R of the first band, and combine the two polarization states of the light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam R of the second band, and send the light beam R of the first band and the light beam R of the second band to the splitting / combining component 5.

[0498] For the implementation of the first polarization light splitting / combining component 42 and the second polarization light splitting / combining component 43 , please refer to the above content and will not be described in detail here.

[0499] For the implementation of the wave splitter-combiner component 5, please refer to the above-mentioned contents of combining two light beams of different wavelength bands and splitting one light beam into two light beams of different wavelength bands, which will not be repeated here.

[0500] In some examples, the wave splitter / combiner component 5 is integrated with the first polarization wave splitter / combiner component 42 .

[0501] (2) In some examples, such as Fig.69 As shown, the plurality of combiner groups 22 include a first combiner group 22a, a second combiner group 22b and a third combiner group 22c. The plurality of splitter groups 32 include a first splitter group 32a, a second splitter group 32b and a third splitter group 32c. The plurality of optical input interfaces 301 include a first optical input interface 301a, a second optical input interface 301b and a third optical input interface 301c. The plurality of optical output interfaces 302 include a first optical output interface 302a, a second optical output interface 302b and a third optical output interface 302c.

[0502] like Fig.69 As shown, in the first transmission direction of light, the splitter / combiner assembly 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam T of the first wavelength band, a light beam T of the second wavelength band, and a light beam T of the third wavelength band, and sends the light beam T of the first wavelength band, the light beam T of the second wavelength band, and the light beam T of the third wavelength band to the optical ring device 4. The optical ring device 4 sends the light beam T of the first wavelength band to the first splitter group 32a, sends the light beam T of the second wavelength band to the second splitter group 32b, and sends the light beam T of the third wavelength band to the third splitter group 32c. The first splitter group 32a splits the light beam T of the first wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple first optical output interfaces 302a respectively. The second splitter group 32b splits the light beam T of the second wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple second optical output interfaces 302b respectively. The third splitter group 32c splits the light beam T in the third wavelength band into multiple light beams T, and sends the multiple light beams T to the outside through multiple third optical output interfaces 302c respectively.

[0503] In the second transmission direction of light, the first combiner group 22a combines the multiple light beams input from the multiple first optical input interfaces 301a into a light beam R of the first wavelength band, and sends the light beam R of the first wavelength band to the optical ring device 4. The second combiner group 22b combines the multiple light beams input from the multiple second optical input interfaces 301b into a light beam R of the second wavelength band, and sends the light beam R of the second wavelength band to the optical ring device 4. The third combiner group 22c combines the multiple light beams input from the multiple third optical input interfaces 301c into a light beam R of the third wavelength band, and sends the light beam R of the third wavelength band to the optical ring device 4. The optical ring device 4 sends the light beam R of the first wavelength band, the light beam R of the second wavelength band, and the light beam R of the third wavelength band to the splitter-combiner component 5. The splitter-combiner component 5 combines the light beam R of the first wavelength band, the light beam R of the second wavelength band, and the light beam R of the third wavelength band, and sends the combined light beam to the outside through the single-fiber bidirectional optical interface 6.

[0504] For the implementation of the light ring device 4, please refer to the above-mentioned content related to the light ring device 4 capable of processing three light beams of different wavelength bands, which will not be repeated here.

[0505] For the implementation of the wave splitting and combining component 5, please refer to the above-mentioned contents of combining three light beams of different wavelength bands and splitting one light beam into three light beams of different wavelength bands, which will not be repeated here.

[0506] (3) In some examples, such as Fig.70 As shown, the plurality of combiner groups 22 include a first combiner group 22a, a second combiner group 22b, a third combiner group 22c and a fourth combiner group 22d. The plurality of splitter groups 32 include a first splitter group 32a, a second splitter group 32b, a third splitter group 32c and a fourth splitter group 32d. The plurality of optical input interfaces 301 include a first optical input interface 301a, a second optical input interface 301b, a third optical input interface 301c and a fourth optical input interface 301d. The plurality of optical output interfaces 302 include a first optical output interface 302a, a second optical output interface 302b, a third optical output interface 302c and a fourth optical output interface 302d.

[0507] like Fig.70As shown, in the first transmission direction of light, the splitter / combiner assembly 5 splits the light beam received through the single-fiber bidirectional optical interface 6 into a light beam T of the first wavelength band, a light beam T of the second wavelength band, a light beam T of the third wavelength band, and a light beam T of the fourth wavelength band, and sends the light beam T of the first wavelength band, the light beam T of the second wavelength band, the light beam T of the third wavelength band, and the light beam T of the fourth wavelength band to the optical ring device 4 (the first optical ring device 40a and the second optical ring device 40b in the figure). The optical ring device 4 sends the light beam T of the first wavelength band to the first splitter group 32a, sends the light beam T of the second wavelength band to the second splitter group 32b, sends the light beam T of the third wavelength band to the third splitter group 32c, and sends the light beam T of the fourth wavelength band to the fourth splitter group 32d. The first splitter group 32a splits the light beam T of the first wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple first optical output interfaces 302a respectively. The second splitter group 32b splits the light beam T of the second wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple second optical output interfaces 302b. The third splitter group 32c splits the light beam T of the third wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple third optical output interfaces 302c. The fourth splitter group 32d splits the light beam T of the fourth wavelength band into multiple light beams, and sends the multiple light beams to the outside through multiple fourth optical output interfaces 302d.

[0508] In the second transmission direction of light, the first combiner group 22a combines the multiple light beams input from the multiple first optical input interfaces 301a into a light beam R of the first wavelength band, and sends the light beam R of the first wavelength band to the optical ring device 4. The second combiner group 22b combines the multiple light beams input from the multiple second optical input interfaces 301b into a light beam R of the second wavelength band, and sends the light beam R of the second wavelength band to the optical ring device 4. The third combiner group 22c combines the multiple light beams input from the multiple third optical input interfaces 301c into a light beam R of the third wavelength band, and sends the light beam R of the third wavelength band to the optical ring device 4. The fourth combiner group 22d combines the multiple light beams input from the multiple fourth optical input interfaces 301d into a light beam R of the fourth wavelength band, and sends the light beam R of the fourth wavelength band to the optical ring device 4. The optical ring device 4 sends the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band, and the light beam R of the fourth wavelength band to the splitter-combiner component 5. The wavelength splitter / combiner component 5 combines the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band and the light beam R of the fourth wavelength band, and transmits the combined light beam to the outside through the single-fiber bidirectional optical interface 6 .

[0509] For the implementation of the light ring device 4, please refer to the above-mentioned content related to the light ring device 4 capable of processing four light beams of different wavelength bands, which will not be described in detail here.

[0510] For the implementation of the wave splitter / combiner component 5, please refer to the above-mentioned contents of combining four light beams of different wavelength bands and splitting one light beam into four light beams of different wavelength bands, which will not be repeated here.

[0511] In some examples, such as Fig.64 - Fig.70 As shown, the optical splitter / combiner 300 provided in the embodiment of the present disclosure includes a single-fiber bidirectional optical interface 6 .

[0512] In other examples, such as Fig.71 As shown, the optical splitter and combiner 300 further includes a power splitter 303. There are multiple (e.g., two) single-fiber bidirectional optical interfaces 6, a common end of the power splitter 303 is connected to the splitter and combiner assembly 5, and multiple branch ends (e.g., two) of the power splitter 303 are respectively connected to multiple single-fiber bidirectional optical interfaces 6. The optical signals carried by the multiple optical beams split by the power splitter 303 are the same.

[0513] In some examples, the power splitter 303 is a non-polarizing beam splitter, a non-polarizing beam splitter crystal, a polarizing beam splitter, a non-polarizing beam splitter crystal, or a planar lightwave circuit (PLC) splitter.

[0514] In some examples, such as Fig.72 and Fig.73 As shown, when the optical splitter / combiner 300 is applied to a communication system, the two single-fiber bidirectional optical interfaces 6 of the optical splitter / combiner 300 are respectively connected to the single-fiber bidirectional optical interfaces 6 of the two first optical modules 200 through optical fibers. In this way, the optical splitter / combiner 300 can send the same optical signal to the first communication device 100 through two optical fibers, thereby realizing dual uplink protection of the optical signal and improving the reliability of the communication system.

[0515] In some examples, such as Fig.72 As shown, the two first optical modules 200 connected to the optical splitter / combiner 300 are plugged into the same first communication device 100. In other examples, such as Fig.73 As shown, the two first optical modules 200 connected to the optical splitter / combiner 300 are plugged into different first communication devices 100 .

[0516] In some examples, the optical splitter / combiner 300 further includes a mode filter 7. The mode filter 7 is located on the optical path between the splitter / combiner assembly 5 and the single-fiber bidirectional optical interface 6, and the mode filter 7 is used to filter the reflected light beam reflected back from the transmitted light beam.

[0517] In the above communication system, the first optical module 200 needs to be improved to the optical module provided by the embodiment of the present disclosure. In order to reuse the existing optical modules, the embodiment of the present disclosure also provides another communication system.

[0518] like Fig.74 As shown, the communication system includes a first communication device 100, a third optical module 700, an optical connector 600, an optical splitter and combiner 300, a second communication device 400, and a second optical module 500. The third optical module 700 is plugged into the first communication device 100, the optical transmission port of the third optical module 700 is connected to the optical input component 601 of the optical connector 600, the optical receiving port of the third optical module 700 is connected to the optical output component 602 of the optical connector 600, and the optical bidirectional transmission component 304 of the optical connector 600 is connected to the single-fiber bidirectional optical interface 6 of the optical splitter and combiner 300 through an optical fiber. The second optical module 500 is plugged into the second communication device 400, the optical transmission port of the second optical module 500 is connected to the optical input interface 301 of the optical splitter and combiner 300 through an optical fiber, and the optical receiving port of the second optical module 500 is connected to the optical output interface 302 of the optical splitter and combiner 300 through an optical fiber.

[0519] In the process of the first communication device 100 sending signals to the plurality of second communication devices 400, the first communication device 100 sends electrical signals to the plurality of third optical modules 700. The third optical module 700 converts the electrical signals into light beams T, and sends the light beams T to the optical connector 600. The optical connector 600 receives the light beams T sent by the plurality of third optical modules 700, combines the multiple light beams T, and sends them to the optical splitter and combiner 300 through the optical bidirectional transmission component 604. The optical splitter and combiner 300 splits the received light beams into multiple light beams T, and sends each light beam T to the second optical module 500 through an optical output interface 302. The second optical module 500 converts the received light beams into electrical signals, and sends them to the second communication device 400.

[0520] In the process of multiple second communication devices 400 sending signals to the first communication device 100, the second communication device 400 sends an electrical signal to the second optical module 500. The second optical module 500 converts the electrical signal into a light beam and sends it to the optical input interface 301 of the optical splitter and combiner 300, wherein the wavelength bands of the light beams sent by each second optical module 500 are different. The optical splitter and combiner 300 combines the received multiple light beams and sends them to the optical connector 600 through the single-fiber bidirectional optical interface 6. The optical connector 600 splits the received light beam into multiple light beams R, and sends each light beam R to the third optical module 700 through an optical output component 602. The third optical module 700 receives the light beam R, converts the light beam R into an electrical signal, and sends it to the first communication device 700.

[0521] It can be seen from the above content that the plurality of third optical modules 700 and the optical connector 600 play the role of a first optical module 200, and the optical connector 600 converts the optical ports of the plurality of third optical modules 700 into an optical bidirectional transmission component 604. Similar to the first optical module 200, how to expand the wavelength range of the light beam transmitted by the optical bidirectional transmission component 604 is also a key technical issue.

[0522] The optical connector 600 provided in the embodiment of the present disclosure is exemplarily described below.

[0523] like Fig.75 As shown, the optical connector 600 includes a plurality of optical input components 601, a plurality of optical output components 602, a connector body 603 and an optical bidirectional transmission component 604. The connector body 603 has an optical ring device 4 and a wave splitter / combiner component 5 inside. In the first transmission direction of light, each optical input component 601 is used to send a light beam T to the optical ring device 4, and different optical input components 601 send light beams of different bands. The optical ring device 4 is used to send multiple light beams T of different bands to the wave splitter / combiner component 5. The wave splitter / combiner component 5 is used to combine multiple light beams T of different bands and send the combined light beams through the optical bidirectional transmission component 604. In the second transmission direction of light, the wave splitter / combiner component 5 is used to split the light beam received through the optical bidirectional transmission component 604 into multiple light beams R of different bands and send multiple light beams R of different bands to the optical ring device 4. The optical ring device 4 is used to send multiple light beams R of different bands through multiple optical output components 602 respectively.

[0524] In the technical solution provided by the embodiment of the present disclosure, what are transmitted in the optical ring device 4 of the optical connector 600 are multiple light beams of different wavelength bands, and the transmission paths of the multiple light beams in the optical ring device 4 are different. Therefore, the optical ring device 4 can process the multiple light beams separately. For example, different magnetic fields are applied to the transmission paths of the multiple light beams of different wavelength bands. In this way, although the wavelength range of each light beam still cannot exceed the upper limit wavelength range, the wavelength range of the light beam after the multiple light beams are combined, that is, the wavelength range of the light beam transmitted by the optical bidirectional transmission component 604 can exceed the upper limit wavelength range. It can be seen that the embodiment of the present disclosure expands the wavelength range of the light beam that can be processed by the optical ring device 4 by setting the optical ring device 4 to process the multiple light beams of different wavelength bands separately, thereby expanding the single-fiber wavelength capacity of the optical connector 600.

[0525] Assuming that the wavelength range of each light beam incident to the optical connector 600 is the upper wavelength range, and the number of light paths incident to the optical ring device 4 is N, the wavelength range of the light beam that can be processed by the optical ring device 4 is equal to N times the upper wavelength range.

[0526] The wavelength range of the light beams transmitted by the light beams T and R can be found in the above content and will not be repeated here. The wavelength range of the light beams transmitted by the optical bidirectional transmission component 604 is the same as the wavelength range of the light beams transmitted by the above single-fiber bidirectional optical interface 6 and will not be repeated here.

[0527] The embodiment of the present disclosure does not limit the shape of the optical connector 600 , and an exemplary description is given below.

[0528] In some examples, such as Fig.80 - Fig.83 , Fig.85 - Fig.88 , Fig.90 - Fig.93 As shown, the optical input component 601 and the optical output component 602 are optical fiber connectors, and are both fixed to the connector body 603. This makes the integrity of the optical connector 600 better. Among them, the optical input component 601 is used to be inserted into the optical transmission port of the third optical module 700, and the optical output component 602 is used to be inserted into the optical receiving port of the third optical module 700.

[0529] In some examples, such as Fig.80 - Fig.83 , Fig.85 - Fig.88 , Fig.90 - Fig.93 As shown, the optical input component 601 and the optical output component 602 are arranged in the form of an optical fiber connector pair, and each optical fiber connector pair includes an optical input component 601 and an optical output component 602. In this way, it is convenient to connect the optical connector 600 with the third optical module 700. The optical input component 601 and the optical output component 602 included in each optical fiber connector pair are used to be inserted into the optical transmission port and the optical receiving port of the same third optical module 700.

[0530] In other examples, such as Fig.94 and Fig.97 As shown, the optical input component 601 and the optical output component 602 are optical fiber connectors, and both are connected to the connector body 603 through a flexible optical cable.

[0531] The technical solution provided by the embodiment of the present disclosure is to connect the optical input component 601 and the optical output component 602 to the connector body 603 through a flexible optical cable, so that during the process of docking the optical fiber connector with the third optical module 700, the optical fiber connectors will not interfere with each other, thereby ensuring the smoothness of the docking of the optical fiber connector with the third optical module 700, reducing the manufacturing accuracy of the optical fiber connector, and saving costs.

[0532] In some examples, such as Fig.98As shown, the optical input component 601 and the optical output component 602 are optical fiber interfaces, and are both located in the connector body 603 .

[0533] In some examples, such as Fig.99 As shown, the optical bidirectional transmission component 604 is an optical fiber interface and is located in the connector body 603 .

[0534] In some examples, such as Fig.96 and Fig.97 As shown, the optical bidirectional transmission component 604 is a fiber optic interface or a fiber optic connector, and is connected to the connector body 603 via a flexible optical cable.

[0535] The embodiment of the present disclosure does not limit the types of optical fiber connectors of the optical input component 601, the optical output component 602, and the optical bidirectional transmission component 604. Exemplarily, the connector types of the optical fiber connectors are Lucent connectors / local connectors (LC), subscriber connectors / standard connectors / square connectors (SC), or multi-fiber push-on (MPO) connectors. The types of optical fiber connectors in the drawings of the embodiments of the present disclosure are all LC type.

[0536] The embodiment of the present disclosure does not limit the structure of the ferrule end face of the optical fiber connector. Exemplarily, the structure of the ferrule end face of the optical fiber connector is a physical contact (PC) end face, an angled physical contact (APC) end face, or an ultra physical contact (UPC) end face.

[0537] Next, the implementation of the optical ring device 4 and the transmitting optical path and the receiving optical path of the optical connector 600 are exemplarily described in combination with the specific numbers of the optical input components 601 and the optical output components 602 .

[0538] (1) In some examples, such as Fig.76 and Fig.77As shown, the plurality of optical input components 601 include a first optical input component 601a and a second optical input component 601b. The plurality of optical output components 602 include a first optical output component 602a and a second optical output component 602b. The first optical input component 601a and the first optical output component 602a are respectively used to connect with the optical transmission port and the optical receiving port of the first third optical module 700, and the first third optical module 700 is used to send and receive light beams of the first wavelength band. The second optical input component 601b and the second optical output component 602b are respectively used to connect with the optical transmission port and the optical receiving port of the second third optical module 700, and the second third optical module 700 is used to send and receive light beams of the second wavelength band.

[0539] In the first transmission direction of light, the first light input component 601a receives the light beam T of the first wavelength band sent by the first third light module 700. The second light input component 601b receives the light beam T of the second wavelength band sent by the second third light module 700. Fig.76 In the figure are the first optical circulator 40a and the second optical circulator 40b, Fig.77 The first optical circulator 40a receives the light beam T of the first wavelength band and the light beam T of the second wavelength band, and sends the light beam T of the first wavelength band and the light beam T of the second wavelength band to the wave splitter / combiner component 5. The wave splitter / combiner component 5 combines the light beam T of the first wavelength band and the light beam T of the second wavelength band, and sends the combined light beam to the outside through the optical bidirectional transmission component 604.

[0540] In the second transmission direction of light, the wave splitter / combiner assembly 5 splits the light beam received through the optical bidirectional transmission component 604 into a light beam R of a first wavelength band and a light beam R of a second wavelength band, and sends the light beam R of the first wavelength band and the light beam R of the second wavelength band to the optical ring device 4. The optical ring device 4 sends the light beam R of the first wavelength band to the first third optical module 700 through the first optical output component 602a, and sends the light beam R of the second wavelength band to the second third optical module 700 through the second optical output component 602b.

[0541] It can be seen that the optical connector 600 can convert a total of four optical ports of the two third optical modules 700 into an optical bidirectional transmission component 604, thereby realizing single-fiber bidirectional transmission of optical signals of the two third optical modules 700.

[0542] In some examples, such as Fig.80 and Fig.81 As shown, there are two fiber connector pairs, which are arranged horizontally. The two fiber connector pairs are used to connect with two third optical modules 700 arranged horizontally. In other examples, such as Fig.82 and Fig.83 As shown, there are two optical fiber connector pairs, which are arranged vertically. The two optical fiber connector pairs are used to connect with two third optical modules 700 arranged vertically.

[0543] One optical fiber connector pair includes a first optical input component 601a and a first optical output component 602a, and the other optical fiber connector pair includes a second optical input component 601b and a second optical output component 602b.

[0544] In some examples, in order to enable the light ring device 4 to effectively process both the light beam of the first wavelength band and the light beam of the second wavelength band, as shown in FIG. Fig.78 and Fig.79 As shown, the optical ring device 4 includes a first non-reciprocal polarization rotation part 410a and a second non-reciprocal polarization rotation part 410b. The working band of the first non-reciprocal polarization rotation part 410a covers the first band, and is used to adjust the polarization direction of the light beam in the first band. The working band of the second non-reciprocal polarization rotation part 410b covers the second band, and is used to adjust the polarization direction of the light beam in the second band.

[0545] The first non-reciprocal polarization rotation part 410a is located on the transmission path of the two polarization states of the light beam separated from the light beam of the first wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The second non-reciprocal polarization rotation part 410b is located on the transmission path of the two polarization states of the light beam separated from the light beam of the second wavelength band, and is used to make a first adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam T, and to make a second adjustment to the polarization direction of the two polarization states of the light beam separated from the light beam R. The first adjustment and the second adjustment are different, for example, one of the first adjustment and the second adjustment is to rotate the polarization direction of the light beam by 90°, and the other is to keep the polarization direction of the light beam unchanged.

[0546] In some examples, the first optical circulator 40a includes a first non-reciprocal polarization rotating portion 410a, and the second optical circulator 40b includes a second non-reciprocal polarization rotating portion 410b. Fig.76 As shown, in the first transmission direction of light, the first optical circulator 40a is used to receive the light beam T of the first wavelength band from the first optical input component 601a, and send the light beam T of the first wavelength band to the splitter-combiner component 5. The second optical circulator 40b is used to receive the light beam T of the second wavelength band from the second optical input component 601b, and send the light beam T of the second wavelength band to the splitter-combiner component 5. In the second transmission direction of light, the first optical circulator 40a is used to receive the light beam R of the first wavelength band from the splitter-combiner component 5, and send the light beam R of the first wavelength band through the first optical output component 602a. The second optical circulator 40b is used to receive the light beam R of the second wavelength band from the splitter-combiner component 5, and send the light beam R of the second wavelength band through the second optical output component 602b.

[0547] In other examples, such as Fig.78 and Fig.79 As shown, the first non-reciprocal polarization rotation section 410a and the second non-reciprocal polarization rotation section 410b are located in the same optical circulator 40 (the first optical circulator 40a). Fig.78 As shown, in the first transmission direction of light, the first optical circulator 40a is used to receive the light beam T of the first wavelength band from the first optical input component 601a, receive the light beam T of the second wavelength band from the second optical input component 601b, and send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the wavelength splitter / combiner 5. Fig.79 As shown, in the second transmission direction of light, the first optical circulator 40a is used to receive the light beam R of the first band and the light beam R of the second band from the wavelength splitter / combiner component 5, send the light beam R of the first band through the first light output component 602a, and send the light beam R of the second band through the second light input component 601b.

[0548] In some examples, such as Fig.78 and Fig.79 As shown, the first optical circulator 40a includes a non-reciprocal polarization rotation component 41, a first polarization splitting and combining optical component 42, and a second polarization splitting and combining optical component 43. The non-reciprocal polarization rotation component 41 includes a first non-reciprocal polarization rotation part 410a and a second non-reciprocal polarization rotation part 410b. The first polarization splitting and combining optical component 42 is located on the optical path between the first optical input component 601a, the second optical input component 601b, and the non-reciprocal polarization rotation component 41, and is located on the optical path between the first optical output component 602a, the second optical output component 602b, and the non-reciprocal polarization rotation component 41. The second polarization splitting and combining optical component 43 is located on the optical path between the splitting and combining optical component 5 and the non-reciprocal polarization rotation component 41.

[0549] For the implementation and arrangement of the first non-reciprocal polarization rotation portion 410a and the second non-reciprocal polarization rotation portion 410b, please refer to the above content and will not be repeated here.

[0550] In some examples, such as Fig.78 As shown, in the first transmission direction of light, the first polarization light splitting / combining component 42 polarization-splits the light beam T of the first band and the light beam T of the second band, sends the two polarization-state light beams separated from the light beam T of the first band to the first non-reciprocal polarization rotation part 410a, and sends the two polarization-state light beams separated from the light beam T of the second band to the second non-reciprocal polarization rotation part 410b. The second polarization light splitting / combining component 43 combines the two polarization-state light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam T of the first band, combines the two polarization-state light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam T of the second band, and sends the light beam T of the first band and the light beam T of the second band to the splitting / combining component 5.

[0551] like Fig.79As shown, in the second transmission direction of light, the second polarization light-splitting and light-combining component 43 polarization-splits the light beam R of the first band and the light beam R of the second band, sends the two polarization-state light beams separated from the light beam R of the first band to the first non-reciprocal polarization rotation part 410a, and sends the two polarization-state light beams separated from the light beam R of the second band to the second non-reciprocal polarization rotation part 410b. The first polarization light-splitting and light-combining component 42 combines the two polarization-state light beams sent by the first non-reciprocal polarization rotation part 410a into the light beam R of the first band, combines the two polarization-state light beams sent by the second non-reciprocal polarization rotation part 410b into the light beam R of the second band, sends the light beam R of the first band through the first light output component 602a, and sends the light beam R of the second band through the second light output component 602b.

[0552] For the implementation of the first polarization light splitting / combining component 42 and the second polarization light splitting / combining component 43 , please refer to the above content and will not be described in detail here.

[0553] For the implementation of the wave splitter-combiner component 5, please refer to the above-mentioned contents of combining two light beams of different wavelength bands and splitting one light beam into two light beams of different wavelength bands, which will not be repeated here.

[0554] In some examples, the optical connector 600 further includes a distinguishing mark, which is used to distinguish the first optical input component 601a from the second optical input component 601b, and to distinguish the first optical output component 602a from the second optical output component 602b. The distinguishing mark is a text mark, a color mark, or a digital mark.

[0555] The technical solution provided by the embodiment of the present disclosure enables the user to accurately connect the first optical input component 601a and the first optical output component 602a with the third optical module 700 for transmitting and receiving light beams of the first band, and to connect the second optical input component 601b and the second optical output component 602b with the third optical module 700 for transmitting and receiving light beams of the second band, by setting distinguishing marks.

[0556] It should be noted that if the docking is incorrect, for example, the first optical input component 601a is docked with the third optical module 700 for transmitting and receiving a light beam in the second band, the first optical input component 601a will introduce a light beam T in the second band, and the light beam T in the second band will pass through the first non-reciprocal polarization rotation portion 410a of the optical ring device 4 instead of the second non-reciprocal polarization rotation portion 410b, so the optical connector 600 will not work properly.

[0557] In some examples, such as Fig.80 - Fig.83 , Fig.94 - Fig.97As shown, the first light input component 601a and the second light output component 602b are fixed together. The second light input component 601b and the second light output component 602b are fixed together.

[0558] (2) In some examples, such as Fig.84 As shown, the plurality of optical input components 601 include a first optical input component 601a, a second optical input component 601b and a third optic...

Claims

1. An optical module, characterized in that: The optical module comprises an electrical connection component (1), a plurality of optical transmitting components (2), a plurality of optical receiving components (3), an optical ring device (4), a wave splitting and combining component (5) and a single-fiber bidirectional optical interface (6); The electrical connection component (1) is electrically connected to the plurality of optical emitting components (2) and the plurality of optical receiving components (3), and is used to be electrically connected to a communication device; The plurality of light emitting components (2) include a first light emitting component (2a) and a second light emitting component (2b), and the plurality of light receiving components (3) include a first light receiving component (3a) and a second light receiving component (3b); In the light transmission direction, the first light emitting component (2a) is used to send a light beam T of a first wavelength band to the optical ring device (4); the second light emitting component (2b) is used to send a light beam T of a second wavelength band to the optical ring device (4); the optical ring device (4) is used to send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the wave splitting and combining component (5); the wave splitting and combining component (5) is used to combine the light beam T of the first wavelength band and the light beam T of the second wavelength band, and send the combined light beam to the outside through the single-fiber bidirectional optical interface (6); In the light receiving direction, the wavelength splitter / combiner component (5) is used to split the light beam received through the single-fiber bidirectional optical interface (6) into a light beam R of a first wavelength band and a light beam R of a second wavelength band, and send the light beam R of the first wavelength band and the light beam R of the second wavelength band to the optical ring device (4); the optical ring device (4) is used to send the light beam R of the first wavelength band to the first light receiving component (3a), and send the light beam R of the second wavelength band to the second light receiving component (3b).

2. The optical module according to claim 1, characterized in that: The optical ring device (4) comprises a first non-reciprocal polarization rotation part (410a) and a second non-reciprocal polarization rotation part (410b); The working band of the first non-reciprocal polarization rotation part (410a) covers the first band, and the first non-reciprocal polarization rotation part (410a) is used to adjust the polarization direction of the light beam in the first band; The working band of the second non-reciprocal polarization rotation part (410b) covers the second band, and the second non-reciprocal polarization rotation part (410b) is used to adjust the polarization direction of the light beam in the second band.

3. The optical module according to claim 2, characterized in that: The first non-reciprocal polarization rotation part (410a) includes a half-wave plate (411) and a first Faraday rotator (412a), and the second non-reciprocal polarization rotation part (410b) includes a half-wave plate (411) and a second Faraday rotator (412b).

4. The optical module according to claim 2 or 3, characterized in that: The optical ring device (4) comprises a first optical circulator (40a) and a second optical circulator (40b), wherein the first optical circulator (40a) comprises the first non-reciprocal polarization rotation part (410a), and the second optical circulator (40b) comprises the second non-reciprocal polarization rotation part (410b); In the light transmission direction, the first optical circulator (40a) is used to receive the light beam T of the first wavelength band from the first optical transmission component (2a), and send the light beam T of the first wavelength band to the wave splitter / combiner component (5); the second optical circulator (40b) is used to receive the light beam T of the second wavelength band from the second optical transmission component (2b), and send the light beam T of the second wavelength band to the wave splitter / combiner component (5); In the light receiving direction, the first optical circulator (40a) is used to receive the light beam R of the first band from the splitter-combiner component (5), and send the light beam R of the first band to the first light receiving component (3a); the second optical circulator (40b) is used to receive the light beam R of the second band from the splitter-combiner component (5), and send the light beam R of the second band to the second light receiving component (3b).

5. The optical module according to claim 2 or 3, characterized in that: The optical ring device (4) comprises a first optical circulator (40a), wherein the first optical circulator (40a) comprises the first non-reciprocal polarization rotation part (410a) and the second non-reciprocal polarization rotation part (410b); In the light transmission direction, the first optical circulator (40a) is used to receive the light beam T of the first wavelength band from the first light transmitting component (2a), receive the light beam T of the second wavelength band from the second light transmitting component (2b), and send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the wave splitter / combiner component (5); In the light receiving direction, the first optical circulator (40a) is used to receive the light beam R of the first band and the light beam R of the second band from the wave splitter / combiner component (5), send the light beam R of the first band to the first light receiving component (3a), and send the light beam R of the second band to the second light receiving component (3b).

6. The optical module according to claim 5, characterized in that: The first optical circulator (40a) comprises a non-reciprocal polarization rotation component (41), a first polarization light splitting and combining component (42) and a second polarization light splitting and combining component (43); The non-reciprocal polarization rotation component (41) comprises the first non-reciprocal polarization rotation part (410a) and the second non-reciprocal polarization rotation part (410b); The first polarization light splitting and combining component (42) is located on an optical path between the first light transmitting component (2a), the second light transmitting component (2b) and the non-reciprocal polarization rotation component (41), and is also located on an optical path between the first light receiving component (3a), the second light receiving component (3b) and the non-reciprocal polarization rotation component (41); The second polarization light splitting and combining component (43) is located on the optical path between the light splitting and combining component (5) and the non-reciprocal polarization rotation component (41).

7. The optical module according to claim 6, characterized in that: The first optical circulator (40a) comprises two first non-reciprocal polarization rotation parts (410a) and two second non-reciprocal polarization rotation parts (410b), and the first non-reciprocal polarization rotation parts (410a) and the second non-reciprocal polarization rotation parts (410b) are arranged alternately; The two first non-reciprocal polarization rotation parts (410a) are respectively used to receive light beams of two polarization states separated from the light beam of the first wavelength band, and the two second non-reciprocal polarization rotation parts (410b) are respectively used to receive light beams of two polarization states separated from the light beam of the second wavelength band.

8. The optical module according to claim 6 or 7, characterized in that: In the light transmission direction, the first polarization light splitting / combining component (42) is used to polarize and split the light beam T of the first wavelength band and the light beam T of the second wavelength band, and send the two polarization state light beams separated from the light beam T of the first wavelength band to the first non-reciprocal polarization rotation part (410a), and send the two polarization state light beams separated from the light beam T of the second wavelength band to the second non-reciprocal polarization rotation part (410b); the second polarization light splitting / combining component (43) is used to combine the two polarization state light beams sent by the first non-reciprocal polarization rotation part (410a) into the light beam T of the first wavelength band, and combine the two polarization state light beams sent by the second non-reciprocal polarization rotation part (410b) into the light beam T of the second wavelength band, and send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the light splitting / combining component (5); In the light receiving direction, the second polarization light-splitting and light-combining component (43) is used to polarization-split the light beam R of the first band and the light beam R of the second band, and send the two polarization state light beams separated from the light beam R of the first band to the first non-reciprocal polarization rotation part (410a), and send the two polarization state light beams separated from the light beam R of the second band to the second non-reciprocal polarization rotation part (410b); the first polarization light-splitting and light-combining component (42) is used to combine the two polarization state light beams sent by the first non-reciprocal polarization rotation part (410a) into the light beam R of the first band, and combine the two polarization state light beams sent by the second non-reciprocal polarization rotation part (410b) into the light beam R of the second band, and send the light beam R of the first band to the first light receiving component (3a), and send the light beam R of the second band to the second light receiving component (3b).

9. The optical module according to any one of claims 6 to 8, characterized in that: The wave splitting and combining component (5) is integrated with the second polarization light splitting and combining component (43).

10. The optical module according to claim 9, characterized in that: The wave splitting and combining component (5) comprises a prism (50), a filter (51) and a reflective element (52); the prism (50) is bonded to the second polarization splitting and combining component (43); the filter (51) is located between the prism (50) and the second polarization splitting and combining component (43); and the reflective element (52) is plated on the prism (50); In the light transmission direction, the filter (51) is used to receive the light beam T of the first wavelength band from the second polarization light splitting and combining component (43); the reflective element (52) is used to receive the light beam T of the second wavelength band from the second polarization light splitting and combining component (43) and reflect the light beam T of the second wavelength band toward the filter (51); the filter (51) is used to combine the light beam T of the first wavelength band and the light beam T of the second wavelength band; In the light receiving direction, the filter (51) is used to split the received light beam into a light beam R of the first wavelength band and a light beam R of the second wavelength band, send the light beam R of the first wavelength band to the second polarization light splitting / combining component (43), and send the light beam R of the second wavelength band to the reflecting element (52); the reflecting element (52) is used to reflect the light beam R of the second wavelength band to the second polarization light splitting / combining component (43).

11. The optical module according to claim 2 or 3, characterized in that: The plurality of light emitting components (2) further include a third light emitting component (2c), the plurality of light receiving components (3) further include a third light receiving component (3c), the light ring device (4) further includes a third non-reciprocal polarization rotating part (410c), the working band of the third non-reciprocal polarization rotating part (410c) covers the third band, and the third non-reciprocal polarization rotating part (410c) is used to adjust the polarization direction of the light beam in the third band; In the light transmission direction, the third optical transmission component (2c) is used to transmit the light beam T of the third wavelength band to the optical ring device (4); the optical ring device (4) is also used to transmit the light beam T of the third wavelength band to the wave splitting and combining component (5); the wave splitting and combining component (5) is used to combine the light beam T of the first wavelength band, the light beam T of the second wavelength band and the light beam T of the third wavelength band, and transmit the combined light beam to the outside through the single-fiber bidirectional optical interface (6); In the light receiving direction, the wavelength splitter / combiner component (5) is used to split the light beam received through the single-fiber bidirectional optical interface (6) into a light beam R of the first wavelength band, a light beam R of the second wavelength band and a light beam R of the third wavelength band, and send the light beam R of the first wavelength band, the light beam R of the second wavelength band and the light beam R of the third wavelength band to the optical ring device (4); the optical ring device (4) is also used to send the light beam R of the third wavelength band to the third light receiving component (3c).

12. The optical module according to claim 11, characterized in that: The optical ring device (4) comprises a first optical circulator (40a), wherein the first optical circulator (40a) comprises the first non-reciprocal polarization rotation part (410a), the second non-reciprocal polarization rotation part (410b) and the third non-reciprocal polarization rotation part (410c); In the light transmission direction, the first optical circulator (40a) is used to receive the light beam T of the first wavelength band from the first optical transmission component (2a), receive the light beam T of the second wavelength band from the second optical transmission component (2b), receive the light beam T of the third wavelength band from the third optical transmission component (2c), and send the light beam T of the first wavelength band, the light beam T of the second wavelength band, and the light beam T of the third wavelength band to the wave splitter / combiner component (5); In the light receiving direction, the first optical circulator (40a) is used to receive the light beam R of the first band, the light beam R of the second band and the light beam R of the third band from the wave splitter / combiner component (5), send the light beam R of the first band to the first light receiving component (3a), send the light beam R of the second band to the second light receiving component (3b), and send the light beam R of the third band to the third light receiving component (3c).

13. The optical module according to claim 11, characterized in that: The plurality of light emitting components (2) further include a fourth light emitting component (2d), the plurality of light receiving components (3) further include a fourth light receiving component (3d), the optical ring device (4) further includes a fourth non-reciprocal polarization rotating part (410d), the working band of the fourth non-reciprocal polarization rotating part (410d) covers a fourth band, and the fourth non-reciprocal polarization rotating part (410d) is used to adjust the polarization direction of the light beam in the fourth band; In the light transmission direction, the fourth optical transmission component (2d) is used to transmit the light beam T of the fourth wavelength band to the optical ring device (4); the optical ring device (4) is also used to transmit the light beam T of the fourth wavelength band to the wave splitting and combining component (5); the wave splitting and combining component (5) is used to combine the light beam T of the first wavelength band, the light beam T of the second wavelength band, the light beam T of the third wavelength band and the light beam T of the fourth wavelength band, and transmit the combined light beam to the outside through the single-fiber bidirectional optical interface (6); In the light receiving direction, the wavelength splitter / combiner component (5) is used to split the light beam received through the single-fiber bidirectional optical interface (6) into a light beam R of the first wavelength band, a light beam R of the second wavelength band, a light beam R of the third wavelength band and a light beam R of the fourth wavelength band, and send the light beam R of the first wavelength band, the light beam R of the second wavelength band, the light beam R of the third wavelength band and the light beam R of the fourth wavelength band to the optical ring device (4); the optical ring device (4) is also used to send the light beam R of the fourth wavelength band to the fourth light receiving component (3d).

14. The optical module according to claim 13, characterized in that: The optical ring device (4) comprises a first optical circulator (40a) and a second optical circulator (40b), wherein the first optical circulator (40a) comprises the first non-reciprocal polarization rotation part (410a) and the second non-reciprocal polarization rotation part (410b), and the second optical circulator (40b) comprises the third non-reciprocal polarization rotation part (410c) and the fourth non-reciprocal polarization rotation part (410d); In the light transmission direction, the first optical circulator (40a) is used to receive the light beam T of the first wavelength band from the first optical transmission component (2a), receive the light beam T of the second wavelength band from the second optical transmission component (2b), and send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the splitter / combiner component (5); the second optical circulator (40b) is used to receive the light beam T of the third wavelength band from the third optical transmission component (2c), receive the light beam T of the fourth wavelength band from the fourth optical transmission component (2d), and send the light beam T of the third wavelength band and the light beam T of the fourth wavelength band to the splitter / combiner component (5); In the light receiving direction, the first optical circulator (40a) is used to receive the light beam R of the first band and the light beam R of the second band from the splitter-combiner component (5), send the light beam R of the first band to the first light receiving component (3a), and send the light beam R of the second band to the second light receiving component (3b); the second optical circulator (40b) is used to receive the light beam R of the third band and the light beam R of the fourth band from the splitter-combiner component (5), send the light beam R of the third band to the third light receiving component (3c), and send the light beam R of the fourth band to the fourth light receiving component (3d).

15. The optical module according to any one of claims 1 to 14, characterized in that: The wavelength range of the first waveband and the wavelength range of the second waveband are both less than 170 nm.

16. The optical module according to any one of claims 1 to 15, characterized in that: The wavelength range of the first band and the wavelength range of the second band both cover at most eight coarse wavelength division multiplexer CWDM bands.

17. The optical module according to any one of claims 1 to 16, characterized in that: The wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface (6) is greater than 200 nm.

18. The optical module according to any one of claims 1 to 17, characterized in that: The wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface (6) covers at least ten coarse wavelength division multiplexer (CWDM) bands.

19. The optical module according to claim 18, characterized in that: The wavelength range of the light beam transmitted by the single-fiber bidirectional optical interface (6) covers sixteen CWDM bands.

20. The optical module according to any one of claims 1 to 19, characterized in that: The optical module also includes a mode filter (7), which is located on the optical path between the wave splitter / combiner component (5) and the single-fiber bidirectional optical interface (6), and is used to filter the reflected light beam reflected back from the transmitted light beam.

21. The optical module according to any one of claims 1 to 20, characterized in that: The electrical connection assembly (1) comprises a plurality of gold finger connectors (11), and the plurality of gold finger connectors (11) are respectively used for docking with a plurality of female connectors in the communication device.

22. The optical module according to claim 21, characterized in that: Each of the plurality of gold finger connectors (11) is electrically connected to one of the optical transmitting components (2) and one of the optical receiving components (3).

23. The optical module according to claim 21 or 22, characterized in that: There are two gold finger connectors (11), and the two gold finger connectors (11) are arranged horizontally or vertically; or, There are three gold finger connectors (11), and the three gold finger connectors (11) are arranged horizontally or vertically; or, There are four gold finger connectors (11), and the four gold finger connectors (11) are arranged horizontally or two horizontally and two vertically.

24. The optical module according to any one of claims 21 to 23, characterized in that: The optical module comprises an optical interface portion (8) and a plurality of electrical plug-in portions (9), the optical interface portion (8) having the single-fiber bidirectional optical interface (6), and the plurality of gold finger connectors (11) are respectively located on the plurality of electrical plug-in portions (9); The plurality of electrical plug-in connectors (9) are arranged at intervals, and each electrical plug-in connector (9) is used to be inserted into a port of the optical cage of the communication device.

25. The optical module according to any one of claims 1 to 20, characterized in that: The optical module adopts a C-type pluggable CFP package or a CFP2 package, and the electrical connection component (1) comprises a gold finger connector (11), the gold finger connector (11) having at least one row of functional signal pins (111) and two rows of high-speed signal pins (112), the two rows of high-speed signal pins (112) being used to transmit electrical signals to the multiple optical transmitting components (2), and to transmit received electrical signals generated by the multiple optical receiving components (3) to the communication device.

26. The optical module according to claim 25, characterized in that: The at least one row of functional signal pins (111) and the two rows of high-speed signal pins (112) are located on different surfaces of the gold finger connector (11), and the two rows of high-speed signal pins (112) are arranged in sequence along a docking direction of the gold finger connector (11).

27. The optical module according to claim 25 or 26, characterized in that: The two rows of high-speed signal pins (112) are used to transmit sixteen transmission electrical signals to the multiple optical transmitting components (2), and are used to transmit sixteen reception electrical signals generated by the multiple optical receiving components (3) to the communication device.

28. The optical module according to any one of claims 1 to 20, characterized in that: The optical module adopts a C-type pluggable CFP package or a CFP2 package, and the electrical connection component (1) comprises two gold finger connectors (11). The two gold finger connectors (11) are located in the same electrical interface of the optical module and are arranged along the thickness direction of the optical module.

29. A light splitting and combining device, characterized in that: The optical splitter / combiner device (300) comprises an optical ring device (4), a splitter / combiner component (5), a single-fiber bidirectional optical interface (6), a plurality of optical input interfaces (301), a plurality of optical output interfaces (302), a plurality of combiner groups (22) and a plurality of splitter groups (32); The multiple optical input interfaces (301) include multiple first optical input interfaces (301a) and multiple second optical input interfaces (301b); the multiple optical output interfaces (302) include multiple first optical output interfaces (302a) and multiple second optical output interfaces (302b); the multiple combiner groups (22) include a first combiner group (22a) and a second combiner group (22b); and the multiple splitter groups (32) include a first splitter group (32a) and a second splitter group (32b); In the first transmission direction of light, the splitter / combiner component (5) is used to split the light beam received through the single-fiber bidirectional optical interface (6) into a light beam T of a first wavelength band and a light beam T of a second wavelength band, and send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the optical ring device (4); the optical ring device (4) is used to send the light beam T of the first wavelength band to the first splitter group (32a), and send the light beam T of the second wavelength band to the second splitter group (32b); the first splitter group (32a) is used to split the light beam T of the first wavelength band into multiple light beams, and send the split multiple light beams through the multiple first optical output interfaces (302a); the second splitter group (32b) is used to split the light beam T of the second wavelength band into multiple light beams, and send the split multiple light beams through the multiple second optical output interfaces (302b); In the second transmission direction of light, the first combiner group (22a) is used to combine the multiple light beams received through the multiple first optical input interfaces (301a) into a light beam R of a first wavelength band, and send the light beam R of the first wavelength band to the optical ring device (4); the second combiner group (22b) is used to combine the multiple light beams received through the multiple second optical input interfaces (301b) into a light beam R of a second wavelength band, and send the light beam R of the second wavelength band to the optical ring device (4); the optical ring device (4) is used to send the light beam R of the first wavelength band and the light beam R of the second wavelength band to the splitter-combiner component (5); the splitter-combiner component (5) is used to combine the light beam R of the first wavelength band and the light beam R of the second wavelength band, and send the combined light beam through the single-fiber bidirectional optical interface (6).

30. The optical splitter / combiner device according to claim 29, characterized in that: The optical splitter / combiner (300) further comprises a power splitter (303), and the single-fiber bidirectional optical interface (6) is multiple; The power divider (303) is located on the optical path between the splitter-combiner component (5) and the single-fiber bidirectional optical interface (6), and the common end of the power divider (303) is connected to the splitter-combiner component (5), and the multiple branch ends of the power divider (303) are respectively connected to the multiple single-fiber bidirectional optical interfaces (6).

31. An optical connector, characterized in that: The optical connector (600) comprises a plurality of optical input components (601), a plurality of optical output components (602), a connector body (603) and an optical bidirectional transmission component (604); the connector body (603) has an optical ring device (4) and a wave splitter / combiner component (5) inside; The plurality of light input components (601) include a first light input component (601a) and a second light input component (601b), and the plurality of light output components (602) include a first light output component (602a) and a second light output component (602b); In a first transmission direction of light, the first light input component (601a) is used to send a received light beam T of a first wavelength band to the light ring device (4); the second light input component (601b) is used to send a received light beam T of a second wavelength band to the light ring device (4); the light ring device (4) is used to send the light beam T of the first wavelength band and the light beam T of the second wavelength band to the splitter-combiner component (5); the splitter-combiner component (5) is used to combine the light beam T of the first wavelength band and the light beam T of the second wavelength band, and send the combined light beam through the optical bidirectional transmission component (604); In the second transmission direction of light, the wavelength splitter / combiner component (5) is used to split the light beam received through the optical bidirectional transmission component (604) into a light beam R of a first wavelength band and a light beam R of a second wavelength band, and send the light beam R of the first wavelength band and the light beam R of the second wavelength band to the optical ring device (4); the optical ring device (4) is used to send the light beam R of the first wavelength band through the first light output component (602a), and send the light beam R of the second wavelength band through the second light output component (602b).

32. The optical connector according to claim 31, wherein: The optical input component (601) and the optical output component (602) are optical fiber connectors, and are both fixed to the connector body (603).

33. The optical connector according to claim 32, wherein: The optical input component (601) and the optical output component (602) are arranged in the form of an optical fiber connector pair, and each optical fiber connector pair includes one optical input component (601) and one optical output component (602).

34. The optical connector according to claim 33, wherein: There are two optical fiber connector pairs, and the two optical fiber connector pairs are arranged horizontally or vertically; or, There are three optical fiber connector pairs, and the three optical fiber connector pairs are arranged horizontally or vertically; or, There are four optical fiber connector pairs, and the four optical fiber connector pairs are arranged horizontally or two horizontally and two vertically.

35. The optical connector according to claim 31, wherein: The optical input component (601) and the optical output component (602) are optical fiber connectors, and are both connected to the connector body (603) via a flexible optical cable.

36. The optical connector according to claim 31, wherein: The optical input component (601) and the optical output component (602) are optical fiber interfaces, and are both located in the connector body (603).

37. The optical connector according to any one of claims 31 to 36, characterized in that: The optical bidirectional transmission component (604) is an optical fiber interface and is located in the connector body (603).

38. The optical connector according to any one of claims 31 to 36, characterized in that: The optical bidirectional transmission component (604) is an optical fiber interface or an optical fiber connector, and is connected to the connector body (603) via a flexible optical cable.

39. The optical connector according to any one of claims 31 to 38, characterized in that: The optical connector (600) further comprises a distinguishing mark, wherein the distinguishing mark is used to distinguish the first optical input component (601a) from the second optical input component (601b), and is used to distinguish the first optical output component (602a) from the second optical output component (602b).

40. An optical component, characterized in that: The optical component comprises a non-reciprocal polarization rotation component (41), a first polarization light splitting and combining component (42) and a second polarization light splitting and combining component (43); The non-reciprocal polarization rotation component (41) is located on the optical path between the first polarization light splitting and combining component (42) and the second polarization light splitting and combining component (43); The non-reciprocal polarization rotation component (41) comprises a first non-reciprocal polarization rotation part (410a) and a second non-reciprocal polarization rotation part (410b), wherein the working band of the first non-reciprocal polarization rotation part (410a) and the working band of the second non-reciprocal polarization rotation part (410b) are different.

41. A communication system, characterized in that: The communication system comprises a first communication device (100), a first optical module (200), an optical splitter / combiner (300), a second communication device (400) and a second optical module (500), wherein the first optical module (200) is an optical module according to any one of claims 1 to 28, and the optical splitter / combiner (300) is an optical splitter / combiner according to claim 29 or 30; The first optical module (200) is plugged into the first communication device (100), and the single-fiber bidirectional optical interface (6) of the first optical module (200) is connected to the single-fiber bidirectional optical interface (6) of the optical splitter / combiner (300) via an optical fiber; The second optical module (500) is plugged into the second communication device (400), and the optical transmission port of the second optical module (500) is connected to the optical input interface (301) of the optical splitter (300) via an optical fiber, and the optical receiving port of the second optical module (500) is connected to the optical output interface (302) of the optical splitter (300) via an optical fiber.

42. The communication system according to claim 41, characterized in that The optical splitter / combiner (300) is the optical splitter / combiner as claimed in claim 30; The multiple single-fiber bidirectional optical interfaces (6) of the optical splitter / combiner (300) are respectively connected to the multiple single-fiber bidirectional optical interfaces (6) of the first optical modules (200) via multiple optical fibers.

43. A communication system, characterized in that: The communication system comprises a first communication device (100), a third optical module (700), an optical connector (600), an optical splitter / combiner (300), a second communication device (400) and a second optical module (500), wherein the optical connector (600) is an optical connector according to any one of claims 31 to 38, and the optical splitter / combiner (300) is an optical splitter / combiner according to claim 29 or 30; The third optical module (700) is plugged into the first communication device (100), the optical transmission port of the third optical module (700) is connected to the optical input component (601) of the optical connector (600), the optical receiving port of the third optical module (700) is connected to the optical output component (602) of the optical connector (600), and the optical bidirectional transmission component (604) of the optical connector (600) is connected to the single-fiber bidirectional optical interface (6) of the optical splitter / combiner (300) via an optical fiber; The second optical module (500) is plugged into the second communication device (400), the optical transmission port of the second optical module (500) is connected to the optical input interface (301) of the optical splitter (300) via an optical fiber, and the optical receiving port of the second optical module (500) is connected to the optical output interface (302) of the optical splitter (300) via an optical fiber.

44. The communication system according to claim 43, characterized in that The optical splitter / combiner (300) is the optical splitter / combiner as claimed in claim 30; The multiple single-fiber bidirectional optical interfaces (6) of the optical splitter / combiner (300) are respectively connected to the optical bidirectional transmission components (604) of the multiple optical connectors (600) via multiple optical fibers.

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