A coupling device and coupling method for a single fiber bidirectional optical device

Abstract

The application provides a coupling device and a coupling method of a single-fiber bidirectional optical device. The coupling device comprises a wavelength division module, a coupling light source, an optical power monitor and an optical beam quality analyzer. The wavelength division module comprises three ports. The first port is used for connecting with an adapter of the optical device. The second port is used for connecting with the coupling light source to receive coupling light sent by the coupling light source and output the coupling light to the first port. The third port is used for connecting with the optical power monitor to receive optical signals output by the adapter of the optical device from the first port. The optical beam quality analyzer is arranged at a receiving assembly of the single-fiber bidirectional optical device to be coupled and is used for monitoring optical parameters at the receiving assembly. The coupling device of the single-fiber bidirectional optical device can simultaneously observe the optical power index of a transmitting assembly and the responsivity index of a receiving assembly when the adapter is coupled, so that the coupling of the transmitting and receiving assemblies is balanced, and the product quality is improved.

Description

Technical Field

[0001] This invention relates to the field of optical device technology, and in particular to a coupling device and coupling method for a single-fiber bidirectional optical device. Background Technology

[0002] Single-fiber bidirectional optical devices generally include single-transmitter, single-receiver devices (such as...) Figure 1 (as shown) and dual-transmitter dual-receiver devices (such as...) Figure 2 (As shown). Figure 1 For example, a single-fiber bidirectional optical device 4 generally includes a TO or BOX packaged transmitting component 41, a TO packaged receiving component 42, and an adapter 43. The transmitting component 41, receiving component 42, and adapter 43 are all soldered onto a metal tube 44. The existing coupling method is as follows: the transmitting component 41 is coupled and fixed to the round / square tube 44; then the transmitting component 41 is powered on, moved, and the optical power at the adapter 43 is observed; the adapter 43 is coupled and fixed to the position where the received optical power is maximized; finally, the receiving component 42 is powered on, and light of the same wavelength as the receiving wavelength is input from the adapter 43; the responsivity received by the receiving component 42 is moved and observed; the receiving component 42 is coupled and fixed to the position where the responsivity is maximized. Figure 2 The illustrated dual-transmitter dual-receiver device has a transmitting component 41 including two transmitting chips 411 that are combined by a filter 412; a receiving component 42 including two receiving chips 421 encapsulated in a TO; a metal tube 44 is provided with multiple filters, which can reflect the received light of different wavelengths into the receiving component 42 and be received by the corresponding wavelength receiving chip; when coupling the receiving component 42, it is necessary to couple two receiving lights at the same time, which requires higher accuracy in position coupling. Summary of the Invention

[0003] The inventors discovered that while existing coupling methods can determine the optimal adapter position based on the coupling of the transmitting component, they cannot couple the receiving component to its optimal responsivity. This is especially true for applications such as... Figure 2 The dual-transmitter, dual-receiver optical device shown requires simultaneous coupling of two receiving optical beams. However, in existing coupling schemes, since the adapter positions are predetermined, there is a situation where no matter how the position of the receiving components is adjusted, it is impossible to couple both receiving optical beams to the required conditions.

[0004] In view of the above problems, it is necessary to propose a coupling device and a coupling method for a single-fiber bidirectional optical device, which can ensure that the receiving component is also coupled to the optimal response, so as to improve the quality of optical device products.

[0005] The present invention proposes a coupling device for a single-fiber bidirectional optical device, wherein the optical device includes at least a tube and a transmitting component, a receiving component, and an adapter to be fixed to the tube, and the coupling device includes at least a multiplexing / splitting component, a coupling light source, an optical power monitor, and a beam quality analyzer, wherein: The wave splitter / combiner assembly includes three ports, with the first port used to connect to the adapter of the optical device; The second port is used to connect to the coupled light source to receive the coupled light sent by the coupled light source and output the coupled light to the first port; The third port is used to connect to an optical power monitor to receive optical signals output from the adapter of the optical device from the first port; The beam quality analyzer is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled, and is used to monitor the optical parameters at the receiving component.

[0006] Furthermore, the wave splitter / multiplexer is an optical circulator, and the first port is an optical fiber connector for bidirectional optical transmission.

[0007] Furthermore, the wave splitter / combiner assembly includes a filter and a reflector, wherein: The filter is used to allow coupled light with the same receiving wavelength as the optical device to pass through from the second port, and the filter is also used to reflect the optical signal with the same emission wavelength as the optical device that is input through the first port to the reflector. The reflector and the filter are arranged in parallel, and are used to output the light signal reflected by the filter through the third port.

[0008] Furthermore, the reflector is positioned at a 45-degree angle to the coupled light.

[0009] Furthermore, the wave splitter / combiner assembly includes a filter and a reflector, wherein: The reflector is used to reflect coupled light that enters from the second port and has the same receiving wavelength as the optical device; The filter is used to allow an optical signal input through the first port that has the same emission wavelength as the optical device to be output through the third port; the filter is also used to reflect the coupled light reflected by the reflector back to the first port for output.

[0010] Furthermore, the reflector is positioned at a 45-degree angle to the coupled light.

[0011] On the other hand, the present invention also discloses a coupling method for a single-fiber bidirectional optical device, which utilizes the coupling device of the aforementioned single-fiber bidirectional optical device to achieve coupling, including the following steps: The transmitting component of the single-fiber bidirectional optical device to be coupled is fixed to the tube body; The beam quality analyzer is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled. Connect the first port of the wave splitter / combiner to the adapter of the single-fiber bidirectional optical device to be coupled, connect the second port to the coupling light source, and connect the third port to the optical power monitor. The transmitting component of the single-fiber bidirectional optical device emits an optical signal, and the optical power monitor monitors the optical power output from the third port. The coupled light source outputs coupled light that matches the operating wavelength of the receiving component of the single-fiber bidirectional optical device, and the beam quality analyzer monitors the optical parameters at the receiving component. Adjust the position of the adapter relative to the single-fiber bidirectional optical device, observe the optical power value detected by the optical power monitor and the optical parameters received by the beam quality analyzer. When the optical power monitored by the optical power monitor meets the preset optical power index and the optical parameters monitored by the beam quality analyzer meet the preset responsivity index, fix the adapter and receiving component to the tube.

[0012] Furthermore, the optical parameters include at least the spot diameter and ellipticity.

[0013] Furthermore, if the optical power monitored by the optical power monitor does not meet the preset optical power index or the optical parameters monitored by the beam quality analyzer do not meet the preset responsivity index, then after adjusting or replacing the adapter, the subsequent steps such as fixing the transmitting component of the single-fiber bidirectional optical device to be coupled to the tube body are repeated until the adapter and receiving component are fixed to the tube body.

[0014] Based on the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows: This invention discloses a coupling device for a single-fiber bidirectional optical device. The coupling device includes at least a wave splitter / multiplexer assembly, a coupling light source, an optical power monitor, and a beam quality analyzer. The wave splitter / multiplexer assembly has three ports: a first port for connecting to the adapter of the optical device; a second port for connecting to the coupling light source to receive coupled light emitted by the coupling light source and output the coupled light to the first port; and a third port for connecting to the optical power monitor to receive the optical signal output from the adapter of the optical device at the first port. The beam quality analyzer is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled and is used to monitor the optical parameters at the receiving component.

[0015] The coupling device for this single-fiber bidirectional optical device enables coupling of the device. After fixing the transmitting component of the single-fiber bidirectional optical device to be coupled to the tube, the position of the adapter relative to the device is adjusted. The optical power value detected by the optical power monitor and the optical parameters received by the beam quality analyzer are observed. When the optical power monitored by the optical power monitor meets a preset optical power index and the optical parameters monitored by the beam quality analyzer meet a preset responsivity index, i.e., when the transmit-receive balance is achieved during adapter coupling, the adapter and receiving component are then fixed to the tube. This coupling device allows simultaneous observation of the optical power index of the transmitting component and the responsivity index of the receiving component during adapter coupling, thereby achieving transmit-receive balance and improving product quality. Attached Figure Description

[0016] Figure 1 This is a simplified structural diagram of a single-transmitter, single-receiver (BOSA) optical device in the existing single-fiber bidirectional optical device technology. Figure 2 This is a simplified structural diagram of a dual-transmitter dual-receiver BOSA in a single-fiber bidirectional optical device in the prior art; Figure 3 This is a simplified structural diagram of a coupling device for a single-fiber bidirectional optical device, as described in an embodiment of the present invention. Figure 4 This is a simplified structural diagram of a coupling device for another single-fiber bidirectional optical device in an embodiment of the present invention; Figure 5 This is a simplified structural diagram of the coupling device for the third type of single-fiber bidirectional optical device in an embodiment of the present invention; Figure 6 This is a schematic flowchart of a coupling method for a single-fiber bidirectional optical device in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] Combination Figure 3 , Figure 4 As shown, this embodiment of the invention discloses a coupling device for a single-fiber bidirectional optical device, used for coupling such as... Figure 1 , Figure 2 The single-fiber bidirectional optical device shown includes at least a tube 44 and a transmitting component 41, a receiving component 42, and an adapter 43 to be fixed to the tube. The coupling device of the single-fiber bidirectional optical device includes at least a multiplexing / splitting assembly 6, a coupling light source 2, an optical power monitor 3, and a beam quality analyzer 5, wherein: The wave splitter / combiner assembly 6 includes three ports, with the first port 62 used to connect to the adapter 43 of the optical device.

[0019] The second port 61 is used to connect to the coupled light source 2 to receive the coupled light sent by the coupled light source 2 and output the coupled light to the first port 62.

[0020] The third port 63 is used to connect to the optical power monitor 3 to receive the optical signal output from the adapter 43 of the optical device from the first port 62.

[0021] The beam quality analyzer 5 is positioned at the receiving component 42 of the single-fiber bidirectional optical device to be coupled, and is used to monitor the optical parameters at the receiving component 42.

[0022] When the transmitting component 41 of the single-fiber bidirectional optical device emits an optical signal, the signal is output through the adapter 43, then enters the multiplexing / splitting component 6 through the first port 62, and is then output to the optical power monitor 3 through the third port 63. At the same time, the coupling light source 2 emits coupled light at the same operating frequency as the receiving component 42 of the single-fiber bidirectional optical device, which reaches the adapter 43 and the beam quality analyzer 5 located at the receiving component 42 through the second port 61 and the first port 62.

[0023] In some embodiments, the multiplexing / splitter assembly 6 is an optical circulator, and the first port 62 is an optical fiber connector for bidirectional optical transmission. An optical circulator is a multi-port optical device with non-reciprocal characteristics. When an optical signal is input from any port, it is sequentially output from the next port with very little loss; that is, if a signal is input from one port, the signal can only be output from another port, and similarly, a signal input from another port can only be output from a third port. Using an optical circulator achieves the function of the multiplexing / splitter assembly 6 in this embodiment.

[0024] The single-fiber bidirectional optical device to be coupled can be a single-transmitter, single-receiver device, for example, using a transmitting wavelength of 1577nm and a receiving wavelength of 1270nm; or it can be a dual-transmitter, dual-receiver device, for example, using transmitting wavelengths of 1577nm / 1490nm and receiving wavelengths of 1270nm / 1310nm. The specific wavelength is not limited in this embodiment.

[0025] Preferably, for a dual-transmitter dual-receiver device, the third port 63 of the multiplexer / splitter assembly 6 can be configured as two sub-ports, one for transmitting light with a wavelength of 1577nm to the optical power detector 3, and the other for transmitting light with a wavelength of 1490nm to the optical power detector 3.

[0026] In other embodiments, such as Figure 4As shown, the wave splitter / combiner assembly 6 can also adopt another structure, namely, including a filter 64 and a reflector 65. The filter 64 is used to allow coupled light with the same receiving wavelength as the optical device that enters from the second port 61 to pass through. The filter 64 is also used to reflect the optical signal with the same emission wavelength as the optical device that enters through the first port 62 to the reflector 65. The reflector 65 is arranged parallel to the filter 64 and is used to output the optical signal reflected by the filter 64 through the third port 63.

[0027] Specifically, the wave splitter / multiplexer assembly 6 includes a first port 62 (an optical fiber connector) for bidirectional transmission, a second port 61 for receiving light emitted from the coupling light source 2 at a wavelength consistent with the operating wavelength of the receiving component 42 of the device to be coupled, to reach the first port 62, and a third port 63 for outputting signal light input from the first port 62 at a wavelength corresponding to the operating wavelength of the transmitting component 41 of the device to be coupled, to an optical power monitor. The wave splitter / multiplexer assembly 6 also includes a filter 64 and a reflector 65.

[0028] Specifically, taking a single-fiber bidirectional optical transceiver as an example of a dual-transmitter, dual-receiver device, such as using a transmit wavelength of 1577nm / 1490nm and a receive wavelength of 1270nm / 1310nm. (Reference) Figure 4 As shown, the filter 64 and the reflector 65 are placed at 45° and parallel to each other. The filter 64 is configured to allow wavelengths of 1270nm and 1310nm to pass through and reflect wavelengths of 1577nm and 1490nm. The reflector 65 can be configured as a reflector, or it can also be the same as the filter 64 that allows wavelengths of 1270nm and 1310nm to pass through and reflect wavelengths of 1577nm and 1490nm.

[0029] In other embodiments, such as Figure 5 As shown, the wave splitter / combiner assembly 6 can also adopt a third structure, namely, including a filter 64 and a reflector 65. The reflector 65 reflects the coupled light entering from the second port 61, which has the same receiving wavelength as the optical device. The filter 64 allows the optical signal input through the first port 62, which has the same emission wavelength as the optical device, to be output through the third port 63. The filter 64 also reflects the coupled light reflected by the reflector back to the first port 62 for output. That is, the filter 64 can be configured to allow wavelengths of 1577nm and 1490nm to pass through, and reflect wavelengths of 1270nm and 1310nm. The reflector is used to reflect signal light of 1270nm and 1310nm.

[0030] In other embodiments, multiple filters with different angles and transmission and reflection parameters can be combined to ensure that the coupled light energy emitted by the coupled light source 2, which is consistent with the operating wavelength of the receiving component of the device to be coupled, reaches the first port 62, and the signal light energy input from the first port 62, which corresponds to the operating wavelength of the transmitting component of the device to be coupled, reaches the optical power detector 3 through the third port 63.

[0031] This invention discloses a coupling device for a single-fiber bidirectional optical device. The coupling device includes at least a multiplexing / splitting assembly, a coupling light source, an optical power monitor, and a beam quality analyzer. The multiplexing / splitting assembly has three ports: a first port for connecting to the adapter of the optical device; a second port for connecting to the coupling light source to receive coupled light emitted by the coupling light source and output the coupled light to the first port; and a third port for connecting to the optical power monitor to receive the optical signal output from the adapter of the optical device at the first port. The beam quality analyzer is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled and is used to monitor the optical parameters at the receiving component. Using this coupling device for a single-fiber bidirectional optical device, the optical power index of the transmitting component and the responsivity index of the receiving component can be observed simultaneously during adapter coupling, thereby achieving a balance between transmission and reception and improving product quality.

[0032] After providing a detailed introduction to the structure and working principle of various coupling devices for single-fiber bidirectional optical devices, a specific method for realizing the coupling of single-fiber bidirectional optical devices using the aforementioned coupling devices is now disclosed.

[0033] Combination Figure 6 As shown, a coupling method for a single-fiber bidirectional optical device includes steps S101-S106: Step S101: Fix the transmitting component of the single-fiber bidirectional optical device to be coupled to the tube body.

[0034] In some embodiments, the transmitting component and the tube body of the single-fiber bidirectional optical device to be coupled can be fixed by welding.

[0035] Step S102: Position the beam quality analyzer 5 at the receiving component of the single-fiber bidirectional optical device to be coupled.

[0036] That is, a beam quality analyzer 5 is installed at the opening position of the receiving component close to the tube body. This step is to use the beam quality analyzer 5 to receive the light signal sent by the coupled light source 2 instead of the receiving component.

[0037] Step S103: Connect the first port of the wave splitter / combiner component 6 to the adapter of the single-fiber bidirectional optical device to be coupled, connect the second port to the coupling light source 2, and connect the third port to the optical power monitor 3.

[0038] In step S104, the transmitting component of the single-fiber bidirectional optical device emits an optical signal, and the optical power monitor 3 monitors the optical power output from the third port.

[0039] In step S105, the coupled light source 2 outputs coupled light that matches the operating wavelength of the receiving component of the single-fiber bidirectional optical device, and the beam quality analyzer 5 monitors the optical parameters at the receiving component.

[0040] In this embodiment, the optical parameters include at least the spot diameter and ellipticity. For example... Figure 2 The dual-transmitter, dual-receiver device scheme shown can also observe the corresponding coordinates of the centers of the two light spots and the distance between the two light spots.

[0041] Step S106: Adjust the position of the adapter relative to the single-fiber bidirectional optical device, observe the optical power value detected by the optical power monitor 3 and the optical parameters received by the beam quality analyzer 5. When the optical power monitored by the optical power monitor 3 meets the preset optical power index and the optical parameters monitored by the beam quality analyzer 5 meet the preset responsivity index, fix the adapter and receiving component to the tube.

[0042] Specifically, the position of the adapter to be coupled is adjusted, and three-dimensional adjustments are made according to the preset parameters of the instrument to maximize the optical power observed by the optical power monitor; at the same time, the parameters of the two light spots monitored by the beam quality analyzer 5 meet the set values. For example, the parameter indicators are set as follows: light spot spacing 2.4mm; light spot diameter 350; ellipticity 90%; XY coordinates of the light spot center. In this way, the coupling of the transmitting and receiving components of the single-fiber bidirectional optical device can be taken into account simultaneously, achieving transmit-receive balance during adapter coupling.

[0043] The coupling method of the single-fiber bidirectional optical device further includes the following steps: if the optical power monitored by the optical power monitor 3 does not meet the preset optical power index or the optical parameters monitored by the beam quality analyzer 5 do not meet the preset responsivity index, then after adjusting or replacing the adapter, the above steps S101-S106 are repeated.

[0044] It is understood that steps S101, S102, and S103 are all preparatory steps before formal coupling, and their order can be changed. This embodiment of the invention does not limit this.

[0045] The order of steps S104 and S105 can also be replaced, and there is no restriction here.

[0046] The coupling method of the single-fiber bidirectional optical device of the present invention is applicable to coupling devices for single-fiber bidirectional optical devices of all the above structures.

[0047] This invention discloses a coupling device for a single-fiber bidirectional optical device. The coupling device includes at least a wave splitter / multiplexer assembly 6, a coupling light source 2, an optical power monitor 3, and a beam quality analyzer 5. The wave splitter / multiplexer assembly 6 includes three ports: a first port for connecting to the adapter of the optical device; a second port for connecting to the coupling light source 2 to receive the coupled light emitted by the coupling light source 2 and output the coupled light to the first port; and a third port for connecting to the optical power monitor 3 to receive the optical signal output from the adapter of the optical device at the first port. The beam quality analyzer 5 is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled and is used to monitor the optical parameters at the receiving component.

[0048] This invention utilizes a coupling device for a single-fiber bidirectional optical device to achieve coupling. Specifically, after fixing the transmitting component of the single-fiber bidirectional optical device to be coupled to the tube, the position of the adapter relative to the single-fiber bidirectional optical device is adjusted. The optical power value detected by the optical power monitor 3 and the optical parameters received by the beam quality analyzer 5 are observed. When the optical power monitored by the optical power monitor 3 meets a preset optical power index and the optical parameters monitored by the beam quality analyzer 5 meet a preset responsivity index, i.e., when the transmit-receive balance is achieved during adapter coupling, the adapter and receiving component are then fixed to the tube. This coupling device for the single-fiber bidirectional optical device allows simultaneous observation of the optical power index of the transmitting component and the responsivity index of the receiving assembly during adapter coupling, thereby achieving transmit-receive balance and improving product quality.

[0049] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0050] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term “comprising” as used in the specification or claims is interpreted in a manner similar to the term “including,” just as “including,” is interpreted as a conjunction in the claims. Additionally, the use of any term “or” in the specification of the claims is intended to mean “non-exclusive or.”

Claims

1. A coupling method for a single-fiber bidirectional optical device, characterized in that, A coupling device is provided for a single-fiber bidirectional optical device. The optical device includes at least a tube and a transmitting component, a receiving component, and an adapter to be fixed to the tube. The coupling device includes at least a wave splitter / multiplexer, a coupling light source, an optical power monitor, and a beam quality analyzer. The wave splitter / multiplexer includes three ports: a first port for connecting to the adapter of the optical device; and a second port for connecting to the coupling light source to receive coupled light emitted by the coupling light source and output the coupled light to the first port. The third port is used to connect to an optical power monitor to receive optical signals output from the adapter of the optical device from the first port; The beam quality analyzer is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled, and is used to monitor the optical parameters at the receiving component. The coupling method of the single-fiber bidirectional optical device includes: The transmitting component of the single-fiber bidirectional optical device to be coupled is fixed to the tube body; The beam quality analyzer is positioned at the receiving component of the single-fiber bidirectional optical device to be coupled. Connect the first port of the wave splitter / combiner to the adapter of the single-fiber bidirectional optical device to be coupled, connect the second port to the coupling light source, and connect the third port to the optical power monitor. The transmitting component of the single-fiber bidirectional optical device emits an optical signal, and the optical power monitor monitors the optical power output from the third port. The coupled light source outputs coupled light that matches the operating wavelength of the receiving component of the single-fiber bidirectional optical device, and the beam quality analyzer monitors the optical parameters at the receiving component. Adjust the position of the adapter relative to the single-fiber bidirectional optical device, observe the optical power value detected by the optical power monitor and the optical parameters received by the beam quality analyzer. When the optical power monitored by the optical power monitor meets the preset optical power index and the optical parameters monitored by the beam quality analyzer meet the preset responsivity index, fix the adapter and receiving component to the tube.

2. The coupling method as described in claim 1, characterized in that, The wave splitter / combiner is an optical circulator, and the first port is an optical fiber connector for bidirectional optical transmission.

3. The coupling method as described in claim 1 or 2, characterized in that, It also includes the following steps: If the optical power monitored by the optical power monitor does not meet the preset optical power index or the optical parameters monitored by the beam quality analyzer do not meet the preset responsivity index, then the adapter should be adjusted or replaced.

4. The coupling method as described in claim 1, characterized in that, The wave splitter / combiner assembly includes a filter and a reflector, wherein: The filter is used to allow coupled light with the same receiving wavelength as the optical device to pass through from the second port, and the filter is also used to reflect the optical signal with the same emission wavelength as the optical device that is input through the first port to the reflector. The reflector and the filter are arranged in parallel, and are used to output the light signal reflected by the filter through the third port.

5. The coupling method as described in claim 1, characterized in that, The wave splitter / combiner assembly includes a filter and a reflector, wherein: The reflector is used to reflect coupled light that enters from the second port and has the same receiving wavelength as the optical device; The filter is used to allow an optical signal input through the first port that has the same emission wavelength as the optical device to be output through the third port; the filter is also used to reflect the coupled light reflected by the reflector back to the first port for output.

6. The coupling method as described in claim 4, characterized in that, The filter is positioned at a 45-degree angle to the coupled light.

7. The coupling method as described in claim 5, characterized in that, The reflector is positioned at a 45-degree angle to the coupled light.

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