Bidirectional optical component, optical module and optical network equipment

Abstract

The invention provides a bidirectional optical component, an optical module and optical network equipment, and belongs to the technical field of optics. The bidirectional optical component comprises a packaging body, an optical transmitting component, an optical receiving component and a wave combining and separating filter. The packaging body is provided with a main chamber, an isolation chamber and a light window. The isolation chamber is communicated with the main chamber through an opening. The light emitting assembly and the wave combining and dividing filter are located in the main cavity, the light emitting assembly is used for emitting a first path of light, and the wave combining and dividing filter is used for outputting the first path of light to the light window and emitting a second path of light received from the light window. The light receiving assembly is provided with a detector which is located in the isolation chamber and used for receiving the second path of light through the open hole. Because the light emitting assembly and the detector are respectively arranged in the main chamber and the isolation chamber, the light signals emitted by the light emitting assembly and the radiated electric signals are not easy to influence the detector, and the receiving performance of the detector is ensured not to be deteriorated due to crosstalk.

Description

Technical Field

[0001] The present disclosure relates to the field of optical technology, and in particular to a bidirectional optical component, an optical module and an optical network device. Background Art

[0002] Passive optical network (PON) is a technology that uses a point-to-multipoint tree-shaped fiber distribution network for information transmission. A PON system generally consists of an optical line terminal (OLT) located on the operator side, an optical network unit (ONU) located on the user side, and an optical distribution network (ODN) connecting the two.

[0003] The OLT has an optical module, the key component of which is the bidirectional optical subassembly (BOSA), which has a transmitter optical subassembly (TOSA) and a receiver optical subassembly (ROSA). The transmitter optical subassembly is used to convert the electrical signal of the upper service network into a downstream optical signal and send it to multiple ONUs through the ODN. The receiver optical subassembly is used to convert the upstream optical signal sent by multiple ONUs into an electrical signal. Summary of the invention

[0004] The present disclosure provides a bidirectional optical component, an optical module and an optical network device. The package of the bidirectional optical component has a main chamber and an isolation chamber inside, and the optical transmitting component and the detector are respectively located in the main chamber and the isolation chamber, so that the optical signal emitted by the optical transmitting component and the radiated electrical signal are not easy to affect the optical receiving component. The technical solutions of the bidirectional optical component, the optical module and the optical network device are as follows:

[0005] In a first aspect, the present disclosure provides a bidirectional optical subassembly (BOSA). The bidirectional optical subassembly includes a package, a transmitter optical subassembly (TOSA), a receiver optical sub assembly (ROSA) and a wavelength combining and demultiplexing filter. The package has a main chamber, an isolation chamber and a light window, and the isolation chamber is connected to the main chamber through an opening. The optical transmitting assembly and the wavelength combining and demultiplexing filter are located in the main chamber, the optical transmitting assembly is used to emit a first light, the wavelength combining and demultiplexing filter is used to output the first light to the light window, and emit a second light received from the light window. The light receiving assembly has a detector, the detector is located in the isolation chamber, and the detector is used to receive the second light through the opening.

[0006] The bidirectional optical component provided in the present disclosure may be a bidirectional optical component compatible with a GPON system, an XG(S)PON system, and a 50GPON system, or may be other bidirectional optical components. The XG(S)PON system includes an XGPON system and an XGSPON system.

[0007] The package body is a package body using box packaging technology, and the package body can also be called a package box and a box package body, etc. The optical transmitting component is used to transmit the first light path, and the first light path is the downstream light path. The first light path may include light beams of multiple wavelengths, or may only include light beams of one wavelength. In a possible implementation, the first light path includes a downstream light beam corresponding to GPON, a downstream light beam corresponding to XGSPON or XGPON, and a downstream light beam corresponding to 50GPON. The optical receiving component (detector) is used to receive the second light path, and the second light path is the upstream light path. The second light path may include light beams of multiple wavelengths, or may only include light beams of one wavelength. In a possible implementation, the second light path includes an upstream light beam corresponding to GPON, an upstream light beam corresponding to XGSPON or XGPON, and an upstream light beam corresponding to 50GPON. The wavelength combining and decomposing filter is used to transmit one of the first light path and the second light path, and reflect the other light path, so as to separate the first light path and the second light path.

[0008] The technical solution provided by the present disclosure is to provide a main chamber and an isolation chamber inside the packaging body, and to set the light emitting component in the main chamber, and to set the detector of the light receiving component in the isolation chamber, so that the light signal emitted by the light emitting component and the radiated electrical signal are not likely to affect the light receiving component, and the isolation chamber has a good photoelectric isolation effect, ensuring that the receiving performance of the detector is not degraded due to crosstalk.

[0009] In a possible implementation, the package includes a tube shell and a first pad, the first pad is located inside the tube shell, an isolation chamber is provided between the bottom of the first pad and the tube shell, a main chamber is provided between the top of the first pad and the tube shell, and the first pad has an opening.

[0010] The technical solution provided by the present disclosure adopts the above-mentioned structural design to form a main chamber and an isolation chamber, so that the emission of the first light and the reception of the second light are not at the same level, which also reduces the interference of the first light emitted by the optical transmission component to the detector to a certain extent.

[0011] In a possible implementation, a cover is disposed in the main chamber of the package body, the cover covers the detector, and the cover has an isolation chamber and an opening.

[0012] In a possible implementation, the bottom of the first cushion block has a groove, the groove is connected to the opening, and an isolation chamber is formed between the groove and the tube shell. The technical solution provided by the present disclosure, by providing a groove at the bottom of the first cushion block and forming an isolation chamber between the groove and the tube shell, the provision of the isolation chamber does not increase the size of the tube shell components.

[0013] In a possible implementation, a cover body is provided between the bottom of the first cushion block and the tube shell, the cover body covers the detector, and an isolation chamber is provided inside the cover body. An opening is provided on the first cushion block, and the opening is communicated with the inside of the cover body.

[0014] In a possible implementation, the light receiving assembly further includes a receiving reflector, which is located in the main chamber and is used to reflect the second path of light downward through the opening to the isolation chamber. The receiving reflector can be any optical lens with a reflective function, such as a total reflector.

[0015] In a possible implementation, the light receiving assembly further includes a filter, which is located on the light-incoming side of the receiving reflector, or on the light path between the receiving reflector and the detector. The filter may be a 0° filter, which is used to transmit light of a target wavelength that the detector needs to receive, and filter out light of other wavelengths, so as to further improve the isolation effect of the isolation chamber.

[0016] In a possible implementation, the optical receiving component further includes a demultiplexer (DMUX), and the detector includes a first detector, a second detector, and a third detector. The demultiplexer is used to demultiplex the second optical path into an upstream beam corresponding to GPON, an upstream beam corresponding to XGPON or XGSPON, and an upstream beam corresponding to 50GPON, the first detector is used to receive the upstream beam corresponding to 50GPON, the second detector is used to receive the upstream beam corresponding to XGPON or XGSPON, and the third detector is used to receive the upstream beam corresponding to GPON. There are two or three isolation chambers, the first detector is located in one isolation chamber, the second detector and the third detector are located in another isolation chamber, or, respectively, in the other two isolation chambers.

[0017] In the technical solution provided by the present disclosure, since the first detector receives the uplink light beam corresponding to 50GPON, and 50GPON requires a high transmission rate, the frequency of the electrical signal of the first detector is relatively high, which is easy to interfere with other detectors. On the other hand, the sensitivity index margin of the first detector is small, so the first detector is required to be subjected to small crosstalk, otherwise the crosstalk will produce an unacceptable sensitivity cost.

[0018] Therefore, by isolating at least the first detector from the other two detectors, it is possible to prevent the first detector from being interfered by the other two detectors, and it is possible to prevent the first detector from interfering with the other two detectors.

[0019] In a possible implementation, the bidirectional optical component further includes a first pin and a second pin, wherein the first pin passes through the side wall of the package and is electrically connected to the optical emitting component. The second pin passes through the bottom wall of the package and is electrically connected to the detector. The side wall through which the first pin passes is perpendicular to the width direction of the package. The first pin is used to supply power to the optical emitting component and to transmit a driving signal of the laser to the optical emitting component. The second pin is used to supply power to the optical receiving component and to output the electrical signal converted by the optical receiving component. The first pin and the second pin may be pins or pads.

[0020] The technical solution provided by the present disclosure reduces the size of the package in the width direction occupied by the first pin and the second pin by setting the second pin electrically connected to the detector to pass through the bottom wall of the package, rather than setting the first pin and the second pin to pass through the two side walls arranged in the width direction of the package, thereby reducing the size of the bidirectional optical component in the width direction. In addition, this arrangement also facilitates the placement of the detector in the isolation chamber between the bottom of the first pad and the package.

[0021] In a possible implementation, the optical transmitting component and the optical receiving component are arranged in a direction perpendicular to the main optical path of the bidirectional optical component. The bidirectional optical component also includes a reflector group, which is located in the main chamber and is used to make the first light emitted by the optical transmitting component bend back and then be incident on the wavelength combining and demultiplexing filter, or make the second light emitted from the wavelength combining and demultiplexing filter be bend back and then be incident on the optical receiving component.

[0022] The main optical path of the bidirectional optical component can be the optical path between the wavelength combining and decomposing filter and the optical window, and because both the first light path and the second light path pass through the main optical path, the main optical path can also be called a common optical path. The main optical path is parallel to the length direction of the bidirectional optical component (or package), and the length direction of the bidirectional optical component is the same as the plug-in direction of the optical module.

[0023] The direction perpendicular to the main optical path of the bidirectional optical component may be the width direction of the bidirectional optical component (or package), the height direction of the bidirectional optical component, or other directions perpendicular to the main optical path. The optical emitting component and the optical receiving component are arranged along a direction perpendicular to the main optical path of the bidirectional optical component (which may be referred to as a first direction), which means that the projections of the optical emitting component and the optical receiving component in the first direction at least partially overlap, for example, the overlapping portion accounts for at least 30%, 40%, 50%, 60%, 70%, 80% or 90% of the total length of the optical emitting component or the optical receiving component.

[0024] The reflector group is used to realize the return of the first light path or the second light path. The return means that the angle between the incident light (the first light path or the second light path) incident on the reflector group and the outgoing light (the first light path or the second light path) emitted from the reflector group is greater than 90° and less than or equal to 180°.

[0025] The technical solution provided by the present disclosure reduces the size of the light receiving component and the light transmitting component in the length direction of the package body by arranging the light transmitting component and the light receiving component in a direction perpendicular to the main light path of the bidirectional optical component (that is, perpendicular to the length direction of the package body or the bidirectional optical component), thereby reducing the length of the bidirectional optical component. Furthermore, by arranging a reflector group in the bidirectional optical component, the first path of light can still be incident on the wavelength combining and decomposing filter, and the second path of light can still be incident on the light receiving component, so that the bidirectional optical component can normally transmit the first path of light and receive the second path of light.

[0026] In a possible implementation, the wavelength combining and demultiplexing filter is used to transmit the first path of light emitted by the optical emitting component to the optical window, and reflect the second path of light received from the optical window to the optical receiving component. The reflector group is located on the optical path between the optical emitting component and the wavelength combining and demultiplexing filter, and the reflector group is used to make the first path of light emitted by the optical emitting component be reflected and then incident on the wavelength combining and demultiplexing filter.

[0027] The downlink optical path is: the optical transmitting component transmits the first light to the reflector group, the reflector group makes the first light return and then enter the wavelength combining and demultiplexing filter, and the wavelength combining and demultiplexing filter transmits the first light to the light window. The uplink optical path is: the wavelength combining and demultiplexing filter reflects the second light received from the light window to the optical receiving component.

[0028] The technical solution provided by the present invention is to fold the optical path (i.e., the downstream optical path) between the optical emitting component and the wavelength combining and demultiplexing filter by arranging a reflector group on the optical path between the optical emitting component and the wavelength combining and demultiplexing filter, thereby enabling the optical emitting component and the optical receiving component to be arranged in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0029] In a possible implementation, the first light path incident on the reflector group is parallel to the main light path, and the travel direction is opposite to the light output direction of the bidirectional optical component. The first light path emitted from the reflector group is coaxial with the main light path, and the travel direction is the same as the light output direction of the bidirectional optical component.

[0030] In a possible implementation, the wavelength combining and demultiplexing filter is used to transmit the first path of light emitted by the optical transmitting component to the optical window, and reflect the second path of light received from the optical window. The reflector group is located on the optical path between the wavelength combining and demultiplexing filter and the optical receiving component, and the reflector group is used to make the second path of light reflected by the wavelength combining and demultiplexing filter be reflected back and then incident on the optical receiving component.

[0031] The downlink optical path is: the optical transmitting component transmits the first light to the wavelength combining and demultiplexing filter, and the wavelength combining and demultiplexing filter transmits the first light to the optical window. The uplink optical path is: the wavelength combining and demultiplexing filter reflects the second light received from the optical window to the reflector group, and the reflector group makes the second light return and then incident on the optical receiving component.

[0032] The technical solution provided by the present invention is to fold the optical path (i.e., the upstream optical path) between the wave combining and demultiplexing filter and the optical receiving component by arranging a reflector group on the optical path between the wave combining and demultiplexing filter and the optical receiving component, thereby enabling the optical transmitting component and the optical receiving component to be arranged in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0033] In a possible implementation, the second path of light reflected by the reflector assembly to the light receiving component is parallel to the main light path, and the traveling direction is opposite to the light emitting direction of the bidirectional optical component.

[0034] In a possible implementation, the reflector group includes a first reflector and a second reflector, the first reflector and the second reflector are located on different sides of the main light path, and the second reflector and the light receiving component are located on the same side of the main light path. The wavelength combining and decomposing filter is used to reflect the second path of light received from the light window to the first reflector, the first reflector is used to reflect the second path of light to the second reflector, and the second reflector is used to reflect the second path of light to the light receiving component.

[0035] In a possible implementation manner, the second light path reflected by the first reflector to the second reflector is perpendicular to the main light path.

[0036] In a possible implementation, the wavelength combining and demultiplexing filter is used to reflect the first path of light emitted by the optical transmitting component to the optical window, and transmit the second path of light received from the optical window. The reflector group is located on the optical path between the wavelength combining and demultiplexing filter and the optical receiving component, and the reflector group is used to make the second path of light transmitted by the wavelength combining and demultiplexing filter be reflected and then incident on the optical receiving component.

[0037] The downlink optical path is: the optical transmitting component transmits the first light to the wavelength combining and demultiplexing filter, and the wavelength combining and demultiplexing filter reflects the first light to the optical window. The uplink optical path is: the wavelength combining and demultiplexing filter transmits the second light received from the optical window to the reflector group, and the reflector group makes the second light return and then incident on the optical receiving component.

[0038] The technical solution provided by the present invention is to fold the optical path (i.e., the upstream optical path) between the wave combining and demultiplexing filter and the optical receiving component by arranging a reflector group on the optical path between the wave combining and demultiplexing filter and the optical receiving component, thereby enabling the optical transmitting component and the optical receiving component to be arranged in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0039] In a possible implementation, the wavelength combining and demultiplexing filter is used to reflect the first path of light emitted by the optical emitting component to the optical window, and transmit the second path of light received from the optical window to the optical receiving component. The reflector group is located on the optical path between the optical emitting component and the wavelength combining and demultiplexing filter, and the reflector group is used to make the first path of light emitted by the optical emitting component be reflected and then incident on the wavelength combining and demultiplexing filter.

[0040] The downlink optical path is: the optical transmitting component transmits the first light to the reflector group, the reflector group makes the first light return and then enter the wavelength combining and demultiplexing filter, the wavelength combining and demultiplexing filter reflects the first light to the light window. The uplink optical path is: the wavelength combining and demultiplexing filter transmits the second light received from the light window to the optical receiving component.

[0041] The technical solution provided by the present invention is to set a reflector group on the optical path between the optical transmitting component and the wavelength combining and demultiplexing filter, so that the optical path between the wavelength combining and demultiplexing filter and the optical receiving component (i.e., the downstream optical path) will be folded, thereby facilitating the arrangement of the optical transmitting component and the optical receiving component in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0042] In a possible implementation, the optical transmitting component includes a first laser, a second laser, a third laser and a multiplexer (MUX), the first laser is used to transmit a downstream beam corresponding to 50GPON, the second laser is used to transmit a downstream beam corresponding to XGPON or XGSPON, the third laser is used to transmit a downstream beam corresponding to GPON, and the multiplexer is used to multiplex the downstream beam corresponding to 50GPON, the downstream beam corresponding to XGPON or XGSPON, and the downstream beam corresponding to GPON into a first path of light. The optical receiving component includes a demultiplexer and three detectors, the three detectors are respectively a first detector, a second detector and a third detector, the demultiplexer is used to demultiplex the second path of light into an upstream beam corresponding to GPON, an upstream beam corresponding to XGPON or XGSPON, and an upstream beam corresponding to 50GPON, the first detector is used to receive an upstream beam corresponding to 50GPON, the second detector is used to receive an upstream beam corresponding to XGPON or XGSPON, and the third detector is used to receive an upstream beam corresponding to GPON.

[0043] In a second aspect, the present disclosure provides a bidirectional optical component. The bidirectional optical component includes a package, an optical transmitting component, an optical receiving component, a wavelength combining and demultiplexing filter, and a reflector group. The optical transmitting component, the optical receiving component, the wavelength combining and demultiplexing filter, and the reflector group are located inside the package, and the optical transmitting component and the optical receiving component are arranged in a direction perpendicular to the main optical path of the bidirectional optical component. The wavelength combining and demultiplexing filter is used to output a first light emitted by the optical transmitting component to a light window of the package, and to emit a second light received from the light window, and the optical receiving component is used to receive the second light. The reflector group is used to make the first light emitted by the optical transmitting component be reflected and then incident on the wavelength combining and demultiplexing filter, or to make the second light emitted from the wavelength combining and demultiplexing filter be reflected and then incident on the optical receiving component.

[0044] The bidirectional optical component provided in the present disclosure may be a bidirectional optical component compatible with a GPON system, an XG(S)PON system, and a 50GPON system, or may be other bidirectional optical components. The XG(S)PON system includes an XGPON system and an XGSPON system.

[0045] The main optical path of the bidirectional optical component can be the optical path between the wavelength combining and decomposing filter and the optical window, and because both the first light path and the second light path pass through the main optical path, the main optical path can also be called a common optical path. The main optical path is parallel to the length direction of the bidirectional optical component (or package), and the length direction of the bidirectional optical component is the same as the plug-in direction of the optical module.

[0046] The direction perpendicular to the main optical path of the bidirectional optical component may be the width direction of the bidirectional optical component (or package), the height direction of the bidirectional optical component, or other directions perpendicular to the main optical path. The optical emitting component and the optical receiving component are arranged along a direction perpendicular to the main optical path of the bidirectional optical component (which may be referred to as a first direction), which means that the projections of the optical emitting component and the optical receiving component in the first direction at least partially overlap, for example, the overlapping portion accounts for at least 30%, 40%, 50%, 60%, 70%, 80% or 90% of the total length of the optical emitting component or the optical receiving component.

[0047] The optical transmission component is used to transmit a first light path, and the first light path is a downstream light path. The first light path may include light beams of multiple wavelengths, or may include only a light beam of one wavelength. In a possible implementation, the first light path includes a downstream light beam corresponding to GPON, a downstream light beam corresponding to XGSPON or XGPON, and a downstream light beam corresponding to 50GPON.

[0048] The optical receiving component is used to receive the second light path, which is the uplink light path. The second light path may include light beams of multiple wavelengths, or may include only a light beam of one wavelength. In a possible implementation, the second light path includes an uplink light beam corresponding to GPON, an uplink light beam corresponding to XGSPON or XGPON, and an uplink light beam corresponding to 50GPON.

[0049] The wavelength combining and splitting filter is used to transmit one of the first light and the second light and reflect the other light to separate the first light and the second light. The degree of the wavelength combining and splitting filter is less than 45°, that is, the incident angle of the wavelength combining and splitting filter is less than 45°, where the incident angle is the angle between the incident light and the normal of the wavelength combining and splitting filter. In a possible implementation, the degree of the wavelength combining and splitting filter is less than or equal to 13.5°, that is, the incident angle of the wavelength combining and splitting filter is less than or equal to 13.5°. The wavelength combining and splitting filter can also be called a main filter and a main optical path filter, etc.

[0050] The reflector group is used to realize the return of the first light path or the second light path. The return means that the angle between the direction of travel of the incident light (the first light path or the second light path) incident on the reflector group and the direction of travel of the outgoing light (the first light path or the second light path) emitted from the reflector group is greater than 90° and less than or equal to 180°.

[0051] The technical solution provided by the present disclosure reduces the size of the light receiving component and the light transmitting component in the length direction of the package body by arranging the light transmitting component and the light receiving component in a direction perpendicular to the main light path of the bidirectional optical component (that is, perpendicular to the length direction of the package body or the bidirectional optical component), thereby reducing the length of the bidirectional optical component. Furthermore, by arranging a reflector group in the bidirectional optical component, the first path of light can still be incident on the wavelength combining and decomposing filter, and the second path of light can still be incident on the light receiving component, so that the bidirectional optical component can normally transmit the first path of light and receive the second path of light.

[0052] In a possible implementation, the light emitting component and the light receiving component are arranged along the width direction of the package body.

[0053] In a possible implementation, the wavelength combining and decomposing filter is an 8° filter, a 13° filter or a 13.5° filter, that is, the incident angle of the wavelength combining and decomposing filter is 8°, 13° or 13.5°.

[0054] In a possible implementation, the reflector group includes a first reflector and a second reflector. The first light or the second light is incident on the first reflector, the first reflector reflects the first light or the second light to the second reflector, and the second reflector reflects the first light or the second light out.

[0055] In a possible implementation, the folding means that the angle between the traveling direction of the incident light incident on the reflector assembly 5 and the traveling direction of the outgoing light emitted from the reflector assembly 5 is greater than 140° and less than or equal to 180°.

[0056] In a possible implementation, the reflection means that the angle between the incident light incident on the reflector assembly 5 and the outgoing light emitted from the reflector assembly 5 is greater than 140° and less than or equal to 180°.

[0057] In a possible implementation, the wavelength combining and demultiplexing filter is used to transmit the first path of light emitted by the optical emitting component to the optical window, and reflect the second path of light received from the optical window to the optical receiving component. The reflector group is located on the optical path between the optical emitting component and the wavelength combining and demultiplexing filter, and the reflector group is used to make the first path of light emitted by the optical emitting component be reflected and then incident on the wavelength combining and demultiplexing filter.

[0058] The downlink optical path is: the optical transmitting component transmits the first light to the reflector group, the reflector group makes the first light return and then enter the wavelength combining and demultiplexing filter, and the wavelength combining and demultiplexing filter transmits the first light to the light window. The uplink optical path is: the wavelength combining and demultiplexing filter reflects the second light received from the light window to the optical receiving component.

[0059] The technical solution provided by the present invention is to fold the optical path (i.e., the downstream optical path) between the optical emitting component and the wavelength combining and demultiplexing filter by arranging a reflector group on the optical path between the optical emitting component and the wavelength combining and demultiplexing filter, thereby enabling the optical emitting component and the optical receiving component to be arranged in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0060] In one possible implementation, the first light path incident on the reflector group is parallel to the main light path, and the travel direction is opposite to the light output direction of the bidirectional optical component. The first light path emitted from the reflector group is coaxial with the main light path, and the travel direction is the same as the light output direction of the bidirectional optical component.

[0061] In one possible implementation, the reflector group includes a first reflector and a second reflector, the light emitting component is used to emit a first light path to the first reflector, the first reflector is used to reflect the first light path to the second reflector, and the second reflector is used to reflect the first light path to the wavelength combining and decomposing filter.

[0062] In a possible implementation, the angle between the first reflector and the second reflector is 90°, and the angles between the first reflector and the second reflector and the main light path are both 45°, and the reflector group is used to turn the direction of the incident light beam by 180° before emitting it.

[0063] In a possible implementation, the wavelength combining and demultiplexing filter is used to transmit the first path of light emitted by the optical transmitting component to the optical window, and reflect the second path of light received from the optical window. The reflector group is located on the optical path between the wavelength combining and demultiplexing filter and the optical receiving component, and the reflector group is used to make the second path of light reflected by the wavelength combining and demultiplexing filter be reflected back and then incident on the optical receiving component.

[0064] The downlink optical path is that the optical transmitting component transmits the first light to the wavelength combining and demultiplexing filter, and the wavelength combining and demultiplexing filter transmits the first light to the optical window. The uplink optical path is that the wavelength combining and demultiplexing filter reflects the second light received from the optical window to the reflector group, and the reflector group makes the second light return and then incident on the optical receiving component.

[0065] The technical solution provided by the present invention is to fold the optical path (i.e., the upstream optical path) between the wave combining and demultiplexing filter and the optical receiving component by arranging a reflector group on the optical path between the wave combining and demultiplexing filter and the optical receiving component, thereby enabling the optical transmitting component and the optical receiving component to be arranged in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0066] In a possible implementation, the second path of light reflected by the reflector assembly to the light receiving component is parallel to the main light path, and the traveling direction is opposite to the light emitting direction of the bidirectional optical component.

[0067] In a possible implementation, the reflector group includes a first reflector and a second reflector, the first reflector and the second reflector are located on different sides of the main light path, and the second reflector and the light receiving component are located on the same side of the main light path. The wavelength combining and decomposing filter is used to reflect the second path of light received from the light window to the first reflector, the first reflector is used to reflect the second path of light to the second reflector, and the second reflector is used to reflect the second path of light to the light receiving component.

[0068] In a possible implementation manner, the second light path reflected by the first reflector to the second reflector is perpendicular to the main light path.

[0069] Among them, when the wave combining and decomposing filter is an 8° filter, the angle between the first reflector and the main light path is 37°, when the wave combining and decomposing filter is a 13° filter, the angle between the first reflector and the main light path is 32°, and when the wave combining and decomposing filter is a 13.5° filter, the angle between the first reflector and the main light path is 31.5°.

[0070] In a possible implementation, the included angle between the second reflector and the main light path is 45°, and the second reflector is used to reflect the second light path to the light receiving component in a direction parallel to the main light path and facing away from the light window.

[0071] In a possible implementation, the wavelength combining and demultiplexing filter is used to reflect the first path of light emitted by the optical transmitting component to the optical window, and transmit the second path of light received from the optical window. The reflector group is located on the optical path between the wavelength combining and demultiplexing filter and the optical receiving component, and the reflector group is used to make the second path of light transmitted by the wavelength combining and demultiplexing filter be reflected and then incident on the optical receiving component.

[0072] The downlink optical path is: the optical transmitting component transmits the first light to the wavelength combining and demultiplexing filter, and the wavelength combining and demultiplexing filter reflects the first light to the optical window. The uplink optical path is: the wavelength combining and demultiplexing filter transmits the second light received from the optical window to the reflector group, and the reflector group makes the second light return and then incident on the optical receiving component.

[0073] The technical solution provided by the present invention is to fold the optical path (i.e., the upstream optical path) between the wave combining and demultiplexing filter and the optical receiving component by arranging a reflector group on the optical path between the wave combining and demultiplexing filter and the optical receiving component, thereby enabling the optical transmitting component and the optical receiving component to be arranged in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0074] In a possible implementation, the second light emitted from the reflector assembly is parallel to the main light path, and the traveling direction is the same as the light emitting direction of the bidirectional optical component.

[0075] In a possible implementation, the wavelength combining and demultiplexing filter is used to reflect the first path of light emitted by the optical emitting component to the optical window, and transmit the second path of light received from the optical window to the optical receiving component. The reflector group is located on the optical path between the optical emitting component and the wavelength combining and demultiplexing filter, and the reflector group is used to make the first path of light emitted by the optical emitting component be reflected and then incident on the wavelength combining and demultiplexing filter.

[0076] The downlink optical path is: the optical transmitting component transmits the first light to the reflector group, the reflector group makes the first light return and then enter the wavelength combining and demultiplexing filter, the wavelength combining and demultiplexing filter reflects the first light to the light window. The uplink optical path is: the wavelength combining and demultiplexing filter transmits the second light received from the light window to the optical receiving component.

[0077] The technical solution provided by the present invention is to set a reflector group on the optical path between the optical transmitting component and the wavelength combining and demultiplexing filter, so that the optical path between the wavelength combining and demultiplexing filter and the optical receiving component (i.e., the downstream optical path) will be folded, thereby facilitating the arrangement of the optical transmitting component and the optical receiving component in a direction perpendicular to the main optical path, thereby reducing the length of the bidirectional optical component.

[0078] In a possible implementation, the first path of light emitted by the optical emitting component is parallel to the main light path, and the traveling direction is the same as the light emitting direction of the bidirectional optical component.

[0079] In a possible implementation, the optical transmitting component includes a first laser, a second laser, a third laser and a multiplexer, the first laser is used to transmit a downstream beam corresponding to 50GPON, the second laser is used to transmit a downstream beam corresponding to XGPON or XGSPON, the third laser is used to transmit a downstream beam corresponding to GPON, and the multiplexer is used to multiplex the downstream beam corresponding to 50GPON, the downstream beam corresponding to XGPON or XGSPON, and the downstream beam corresponding to GPON into a first path of light. The optical receiving component includes a first detector, a second detector, a third detector and a demultiplexer, the demultiplexer is used to demultiplex the received second path of light into an upstream beam corresponding to GPON, an upstream beam corresponding to XGPON or XGSPON, and an upstream beam corresponding to 50GPON, the first detector is used to receive an upstream beam corresponding to 50GPON, the second detector is used to receive an upstream beam corresponding to XGPON or XGSPON, and the third detector is used to receive an upstream beam corresponding to GPON.

[0080] The bidirectional optical component is compatible with GPON system, XGPON or XGSPON system and 50GPON system.

[0081] In a possible implementation, the package body has a main chamber and an isolation chamber, and the isolation chamber is connected to the main chamber through an opening. The light emitting component, the wavelength combining and decomposing filter, and the reflector group are located in the main chamber. The light receiving component has a detector, which is located in the isolation chamber and is used to receive the second path of light through the opening.

[0082] The package body is a package body that adopts the box packaging technology, and the package body can also be called a packaging box and a box package body.

[0083] The technical solution provided by the present disclosure is to provide a main chamber and an isolation chamber inside the packaging body, and to set the light emitting component in the main chamber, and to set the detector of the light receiving component in the isolation chamber, so that the light signal emitted by the light emitting component and the radiated electrical signal are not likely to affect the light receiving component, and the isolation chamber has a good photoelectric isolation effect, ensuring that the receiving performance of the detector is not degraded due to crosstalk.

[0084] In a possible implementation, the package includes a tube shell and a first pad, the first pad is located inside the tube shell, an isolation chamber is provided between the bottom of the first pad and the tube shell, a main chamber is provided between the top of the first pad and the tube shell, and the first pad has an opening.

[0085] The technical solution provided by the present disclosure adopts the above-mentioned structural design to form a main chamber and an isolation chamber, so that the emission of the first light and the reception of the second light are not at the same level, which also reduces the interference of the first light emitted by the optical transmission component to the detector to a certain extent.

[0086] In a possible implementation, the bottom of the first cushion block has a groove, the groove is connected to the opening, and an isolation chamber is formed between the groove and the bottom wall of the tube shell. The technical solution provided by the present disclosure, by providing a groove at the bottom of the first cushion block and forming an isolation chamber between the groove and the tube shell, the provision of the isolation chamber does not increase the size of the components of the tube shell.

[0087] In a possible implementation, the light receiving assembly further includes a receiving reflector, which is located in the main chamber and is used to reflect the second path of light downward through the opening to the isolation chamber. The receiving reflector can be any optical lens with a reflective function, such as a total reflector.

[0088] In a possible implementation, the light receiving assembly further includes a filter, which is located on the light-incoming side of the receiving reflector, or on the light path between the receiving reflector and the detector. The filter may be a 0° filter, which is used to transmit light of a target wavelength that the detector needs to receive, and filter out light of other wavelengths, so as to further improve the isolation effect of the isolation chamber.

[0089] When the detector is the first detector, the 0° filter is used to transmit the upstream light beam corresponding to 50GPON. When the detector is the second detector, the 0° filter is used to transmit the upstream light beam corresponding to XGPON or XGSPON. When the detector is the third detector, the 0° filter is used to transmit the upstream light beam corresponding to GPON.

[0090] In a possible implementation, the optical receiving component includes a demultiplexer and three detectors, the three detectors being a first detector, a second detector and a third detector. The demultiplexer is used to demultiplex the received second path of light into an upstream beam corresponding to GPON, an upstream beam corresponding to XGPON or XGSPON and an upstream beam corresponding to 50GPON, the first detector is used to receive an upstream beam corresponding to 50GPON, the second detector is used to receive an upstream beam corresponding to XGPON or XGSPON, and the third detector is used to receive an upstream beam corresponding to GPON. There are two or three isolation chambers, the first detector is located in one isolation chamber, and the second detector and the third detector are located in another or two other isolation chambers.

[0091] In the technical solution provided by the present disclosure, since the first detector receives the uplink light beam corresponding to 50GPON, and 50GPON requires a high transmission rate, the frequency of the electrical signal of the first detector is relatively high, which is easy to interfere with other detectors. On the other hand, the sensitivity index margin of the first detector is small, so the first detector is required to be subjected to small crosstalk, otherwise the crosstalk will produce an unacceptable sensitivity cost.

[0092] Therefore, by isolating at least the first detector from the other two detectors, it is possible to prevent the first detector from being interfered by the other two detectors, and it is possible to prevent the first detector from interfering with the other two detectors.

[0093] In a possible implementation, the bidirectional optical component further includes a first pin and a second pin, the first pin passes through the side wall of the package body, and the second pin passes through the bottom wall of the package body. One of the first pin and the second pin is electrically connected to the optical transmitting component, and the other is electrically connected to the optical receiving component. The side wall passed through by the first pin is perpendicular to the width direction of the package body. The first pin and the second pin can be pins or pads.

[0094] The technical solution provided by the present disclosure reduces the size of the package in the width direction occupied by the first pin and the second pin by setting the second pin to pass through the bottom wall of the package, rather than setting the first pin and the second pin to respectively pass through two side walls of the package arranged along the width direction, thereby reducing the size of the bidirectional optical component in the width direction.

[0095] In a possible implementation, the first pin is electrically connected to the light emitting component, and the second pin is electrically connected to the light receiving component (detector). The first pin is used to supply power to the light emitting component and to transmit a driving signal of the laser to the light emitting component. The second pin is used to supply power to the light receiving component and to output the electrical signal converted by the light receiving component.

[0096] In a possible implementation, the light emitting component includes a laser, the light emitting direction of the laser is parallel to the bottom wall of the package, and the laser is electrically connected to the first pin. The laser may be a first laser, a second laser, or a third laser.

[0097] The technical solution provided by the present disclosure facilitates electrical connection between the laser and the first pin penetrating the side wall by setting the light emitting direction of the laser parallel to the bottom wall of the package, since the two opposite ends of the laser are used for light emitting and electrical connection respectively.

[0098] In a possible implementation, the light emitting direction of the laser is away from the side wall through which the first pin passes, thereby making it easier to electrically connect the laser to the first pin.

[0099] In a possible implementation, the light receiving assembly includes a detector and a receiving reflector, the detection surface of the detector faces upward, the receiving reflector is used to reflect the second path of light downward to the detector, and the detector is electrically connected to the second pin.

[0100] In the technical solution provided by the present disclosure, since the two opposite sides of the detector are used for receiving optical signals and electrical connection respectively, by setting the detection surface of the detector upward, it is convenient to electrically connect the detector with the second pin penetrating the bottom wall of the package body. In addition, by setting the detection surface of the detector upward, it is also convenient to place the detector in the isolation chamber between the first pad and the bottom wall of the package body.

[0101] In a possible implementation manner, the bidirectional optical component of the first aspect and the bidirectional optical component of the second aspect are the same bidirectional optical component.

[0102] In a third aspect, the present disclosure provides an optical module. The optical module includes a circuit board and a bidirectional optical component as described in any one of the first aspect or the second aspect. The optical module is used to be inserted into an optical network device such as an OLT device. The circuit board can be a printed circuit board (PCB).

[0103] In a possible implementation, the circuit board is electrically connected to both the first pin and the second pin of the bidirectional optical component. The circuit board is used to supply power to the optical transmitting component through the first pin and transmit a driving signal, and is also used to supply power to the optical receiving component through the second pin and receive the electrical signal converted by the optical receiving component.

[0104] In a fourth aspect, the present disclosure provides an optical network device, which includes a single board and the optical module as described in the third aspect, wherein the optical network device may be an OLT device, and the optical module may be plugged into the single board, which is a service board. BRIEF DESCRIPTION OF THE DRAWINGS

[0105] Figure 1 This is a scenario diagram of a PON system;

[0106] Figure 2 is a schematic diagram of a bidirectional optical component in the related art;

[0107] Figure 3 is a schematic diagram of another bidirectional optical component in the related art;

[0108] Figure 4 is a schematic diagram of a first bidirectional optical component provided by an embodiment of the present disclosure;

[0109] Figure 5 is a schematic diagram of a second bidirectional optical component provided by an embodiment of the present disclosure;

[0110] Figure 6 is a schematic diagram of a third bidirectional optical component provided by an embodiment of the present disclosure;

[0111] Figure 7 is a schematic diagram of a fourth bidirectional optical component provided by an embodiment of the present disclosure;

[0112] Figure 8 is a schematic diagram of a fifth bidirectional optical component provided by an embodiment of the present disclosure;

[0113] Fig. 9 is a schematic diagram of a sixth bidirectional optical component provided by an embodiment of the present disclosure;

[0114] Fig.10 is a schematic diagram of the internal structure of a first bidirectional optical component provided by an embodiment of the present disclosure;

[0115] Fig.11 is a three-dimensional schematic diagram of a first bidirectional optical component provided by an embodiment of the present disclosure;

[0116] Fig.12 is a schematic diagram of the internal structure of a second bidirectional optical component provided by an embodiment of the present disclosure;

[0117] Fig.13 is a schematic diagram of the internal structure of a third bidirectional optical component provided by an embodiment of the present disclosure;

[0118] Fig.14 is a three-dimensional schematic diagram of a second bidirectional optical component provided by an embodiment of the present disclosure;

[0119] Fig.15 is a schematic diagram of the internal structure of a fourth bidirectional optical component provided by an embodiment of the present disclosure;

[0120] Fig.16 is a three-dimensional schematic diagram of a third bidirectional optical component provided by an embodiment of the present disclosure;

[0121] Fig.17 is a schematic diagram of a first isolation chamber provided by an embodiment of the present disclosure;

[0122] Fig.18 is a schematic diagram of a second isolation chamber provided in an embodiment of the present disclosure;

[0123] Fig.19 is a cross-sectional view of a first bidirectional optical component provided by an embodiment of the present disclosure;

[0124] Fig. 20 is a cross-sectional schematic diagram of a first bidirectional optical component provided by an embodiment of the present disclosure;

[0125] Fig.21 is a schematic diagram of a first type of first cushion block provided by an embodiment of the present disclosure;

[0126] Fig. 22 is a schematic diagram of the optical path of a first bidirectional optical component provided by an embodiment of the present disclosure;

[0127] Fig.23 is a cross-sectional view of a second bidirectional optical component provided by an embodiment of the present disclosure;

[0128] Fig.24 is a cross-sectional schematic diagram of a second bidirectional optical component provided by an embodiment of the present disclosure;

[0129] Fig.25 is a schematic diagram of a second first cushion block provided by an embodiment of the present disclosure;

[0130] Fig.26 is a schematic diagram of an optical path of a second bidirectional optical component provided by an embodiment of the present disclosure;

[0131] Fig. 27 is an external schematic diagram of a bidirectional optical component provided by an embodiment of the present disclosure;

[0132] Fig.28 is an exploded view of a bidirectional optical component provided by an embodiment of the present disclosure;

[0133] Fig.29 is a schematic diagram of the internal structure of a fifth bidirectional optical component provided by an embodiment of the present disclosure;

[0134] Fig.30 It is a schematic diagram of the internal structure of the sixth bidirectional optical component provided in an embodiment of the present disclosure.

[0135] Legend

[0136] 100, OLT, 200, ODN, 300, ONU, A, main optical path, B, downstream optical path, C, upstream optical path;

[0137] 1. package body, 10. main chamber, 11. tube shell, 110. light window, 111. side wall, 112. bottom wall, 12. first pad, 120. isolation chamber, 121. groove, 122. opening, 13. TEC, 14. second pad;

[0138] 2. optical transmission component, 21. first laser, 22. second laser, 23. third laser, 24. multiplexer, 241. first wave combining prism, 242. second wave combining prism, 25. isolator, 26. first collimating lens, 27. second collimating lens, 28. third collimating lens;

[0139] 3. Light receiving component, 301. Detector, 302. Transimpedance amplifier, 303. Receiving reflector, 304. Filter, 305. Focusing lens, 31. First detection component, 311. First detector, 312. First transimpedance amplifier, 313. First receiving reflector, 314. First filter, 315. First focusing lens, 32. Second detection component, 321. Second detector, 322. Second transimpedance amplifier, 323. Second receiving reflector, 324. Second filter, 325. Second focusing lens, 33. Third detection component, 331. Third detector, 332. Second transimpedance amplifier, 333. Third receiving reflector, 334. Third filter, 335. Third focusing lens, 34. Demultiplexer, 340. Diamond glass, 341. First split wave filter, 342. Second split wave filter, 343. Third split wave filter;

[0140] 4. Wavelength combining and decomposing filters;

[0141] 5. a reflector group, 51. a first reflector, 52. a second reflector;

[0142] 6. First pin, 7. Second pin, 8. Fiber optic collimating lens, 9. Fiber optic socket. DETAILED DESCRIPTION

[0143] The disclosed embodiments relate to the technical field of passive optical network (PON). A PON system is generally composed of an optical line terminal (OLT) 100 located on the operator side, an optical network unit (ONU) 300 located on the user side, and an optical distribution network (ODN) 200 connecting the two. Among them, OLT 100 is responsible for distributing data of the upper-layer business network to users. The upper-layer business network includes the public switched telephone network (PSTN), the Internet, and cable TV (CATV). ODN 200 mainly includes a splitter, which is used to distribute the data of the upper-layer business network to each ONU 300. ONU 300 is commonly known as an optical modem and is a home router.

[0144] like Figure 1 As shown, a schematic diagram of the use scenario of the PON system is shown. The ONU 300 on the user side is connected to the optical splitter in the ODN 200 through the optical fiber, and then connected to the OLT 100 through the optical fiber. Among them, the OLT 100 is equipped with an optical module, which is used to connect with the optical fiber. The key component in the optical module is the bidirectional optical subassembly (BOSA), which is used to convert the electrical signal of the upper layer service network into a downstream optical signal, and send it to multiple ONUs 300 through the ODN 200. At the same time, it is used to convert the upstream optical signal sent by multiple ONUs 300 into an electrical signal.

[0145] like Figure 2 As shown, the bidirectional optical component includes a package 1, a transmitter optical subassembly (TOSA) 2, a receiver optical subassembly (ROSA) 3 and a wavelength-combining / demultiplexing filter 4. The optical transmitter assembly 2, the optical receiver assembly 3 and the wavelength-combining / demultiplexing filter 4 are located inside the package 1. The optical transmitter assembly 2 is used to transmit a first path of light to the wavelength-combining / demultiplexing filter 4. The wavelength-combining / demultiplexing filter 4 is used to transmit the first path of light to the optical window 110 of the package 1, and to reflect the second path of light received from the optical window 110 to the optical receiver assembly 3. The first path of light is a downlink light, carrying a downlink optical signal, and the second path of light is an uplink light, carrying an uplink optical signal.

[0146] At present, most of the PON systems are GPON systems and XG(S)PON systems, and the optical transmitting component 2 of the bidirectional optical component includes a multiplexer and two lasers. The two lasers are used to transmit the downstream light beam corresponding to the GPON system and the downstream light beam corresponding to the XG(S)PON system. The multiplexer multiplexes the two downstream light beams into the first light. Correspondingly, the optical receiving component 3 includes a demultiplexer and two detectors. The demultiplexer is used to demultiplex the second light reflected by the wavelength combining and demultiplexing filter 4 into the upstream light beam corresponding to the GPON system and the upstream light beam corresponding to the XG(S)PON system. The two detectors are used to receive the two light beams respectively.

[0147] As users demand large bandwidth and low latency networks, the transmission rate of PON systems is driven towards 50G. Therefore, in the future, GPON, XG(S)PON and 50GPON will coexist. For example, some users use ONUs of GPON system, some use ONUs of XGPON system, and some even use ONUs of 50GPON system. In order to make OLT equipment compatible with GPON, XG(S)PON and 50GPON, it is required to adopt Combo PON technology to combine the three optical modules corresponding to GPON, XG(S)PON and 50GPON into one optical module, that is, to combine three bidirectional optical components into one bidirectional optical component. A more intuitive understanding is that adding devices to the bidirectional optical components compatible with GPON and XG(S)PON makes the bidirectional optical components further compatible with 50GPON.

[0148] In order to make full use of existing network resources, for example, OLT racks must be reusable and compatible with old equipment in the existing network, the size of the bidirectional optical components must not increase too much. Otherwise, the optical module may not be properly inserted into the existing OLT equipment.

[0149] After research, it was found that the compatibility of the bidirectional optical component with 50GPON will mainly increase the length of the bidirectional optical component for the following reasons. First, due to the need to be compatible with 50GPON, a new laser needs to be added to the optical transmitting component 2 to emit the downstream light beam corresponding to 50GPON, and a matching optical lens needs to be added. Correspondingly, a new detector needs to be added to the optical receiving component 3 to receive the upstream light beam corresponding to 50GPON, and a matching optical lens needs to be added. Therefore, the number of devices included in the bidirectional optical component increases, which makes the length of the bidirectional optical component longer. Second, the center wavelength of the downstream light beam corresponding to GPON is 1490nm, and the corresponding wavelength of the upstream light beam is 1310nm. The center wavelength of the downstream light beam corresponding to XG(S)PON is 1577nm, and the corresponding wavelength of the upstream light beam is 1270nm. The center wavelength of the downstream light beam corresponding to 50GPON is 1342nm, and the center wavelength of the corresponding upstream light beam is 1286nm. It can be seen that the central wavelengths of the downstream light beam and the upstream light beam corresponding to 50GPON are closer (only 56nm apart). If the downstream light beam and the upstream light beam corresponding to 50GPON are to be separated, the wavelength combiner / splitter filter 4 is required to have a more precise wavelength splitting capability, that is, the angle of the incident light incident on the wavelength combiner / splitter filter 4 is required to be smaller.

[0150] For example, Figure 2 As shown, for the scenario that is only compatible with GPON and XG(S)PON, since the center wavelengths of the downstream beam and the upstream beam corresponding to GPON are quite different (the difference is 180nm), and the wavelengths of the downstream beam and the upstream beam corresponding to XG(S)PON are also quite different (the difference is 307nm), the combiner / splitter filter 4 uses a 45° filter to separate the upstream beam and the downstream beam.

[0151] However, if Figure 3 As shown, for the scenario that needs to be further compatible with 50GPON, the degree of the wavelength combiner / demultiplexer filter 4 needs to be smaller, for example, the wavelength combiner / demultiplexer filter 4 needs to use an 8° filter, a 13° filter or a 13.5° filter. The degree of the wavelength combiner / demultiplexer filter 4 refers to the degree of the angle between the incident light of the wavelength combiner / demultiplexer filter 4 and the normal when the wavelength combiner / demultiplexer filter 4 is in use.

[0152] like Figure 2 and Figure 3 As shown, after the degree of the wavelength combining and decomposing filter 4 is reduced, the angle between the downstream optical path B and the upstream optical path C corresponding to the wavelength combining and decomposing filter 4 becomes larger (from a right angle to an obtuse angle), and because the optical transmitting component 2 needs to be arranged along the downstream optical path B and the optical receiving component 3 needs to be arranged along the upstream optical path C, the angle between the downstream optical path B and the upstream optical path C becomes larger, which will cause the arrangement of the optical transmitting component 2 and the optical receiving component 3 to become sparse, which also makes the length of the bidirectional optical component longer.

[0153] On the other hand, how to reduce the interference of the strong signal of the optical transmitting component 2 on the weak signal of the optical receiving component 3 is also a technical problem that needs to be solved urgently. This technical problem becomes more serious as the number of lasers and detectors caused by the need for bidirectional optical components to be compatible with 50GPON increases.

[0154] An embodiment of the present disclosure provides a bidirectional optical component, which can achieve a shorter length. The following is an exemplary description of the bidirectional optical component provided by the embodiment of the present disclosure.

[0155] like Figure 4-Figure 9 As shown, the bidirectional optical component includes a package body 1, an optical transmitting component 2, an optical receiving component 3, a wavelength combining and demultiplexing filter 4 and a reflector group 5. The optical transmitting component 2, the optical receiving component 3, the wavelength combining and demultiplexing filter 4 and the reflector group 5 are located inside the package body 1, and the optical transmitting component 2 and the optical receiving component 3 are arranged in a direction perpendicular to the main optical path A of the bidirectional optical component. The wavelength combining and demultiplexing filter 4 is used to output the first path of light emitted by the optical transmitting component 2 to the optical window 110 of the package body 1, and emit the second path of light received from the optical window 110, and the optical receiving component 3 is used to receive the second path of light. The reflector group 5 is used to make the first path of light emitted by the optical transmitting component 2 be folded back and incident on the wavelength combining and demultiplexing filter 4, or make the second path of light emitted from the wavelength combining and demultiplexing filter 4 be folded back and incident on the optical receiving component 3.

[0156] Among them, the bidirectional optical component provided in the embodiment of the present disclosure may be a bidirectional optical component that is compatible with the GPON system, the XG(S)PON system and the 50GPON system, or may be other bidirectional optical components.

[0157] The main optical path A of the bidirectional optical component is the optical path between the wavelength combining and decomposing filter 4 and the optical window 110, and since both the first light path and the second light path pass through the main optical path A, the main optical path A can also be called a common optical path. The main optical path A is parallel to the length direction of the bidirectional optical component (or the package 1), and the length direction of the bidirectional optical component is the same as the plug-in direction of the optical module. The direction perpendicular to the main optical path A of the bidirectional optical component can be the width direction of the bidirectional optical component (or the package 1), or the height direction of the bidirectional optical component, or other directions perpendicular to the main optical path. The optical transmitting component 2 and the optical receiving component 3 are arranged along the direction perpendicular to the main optical path A of the bidirectional optical component (which can be called the first direction), which means that the projections of the optical transmitting component 2 and the optical receiving component 3 in the first direction at least partially overlap, for example, the overlapping part accounts for at least 30%, 40%, 50%, 60%, 70%, 80% or 90% of the total length of the optical transmitting component 2 or the optical receiving component 3.

[0158] The package body 1 may be a package body encapsulated in a box. The optical transmitting component 2 is used to transmit a first light path, and the first light path is a downstream light path. The first light path may include light beams of multiple wavelengths, or may include only light beams of one wavelength. In some examples, the first light path includes a downstream light beam corresponding to GPON, a downstream light beam corresponding to XG(S)PON, and a downstream light beam corresponding to 50GPON. The optical receiving component 3 is used to receive a second light path, and the second light path is an upstream light path. The second light path may include light beams of multiple wavelengths, or may include only light beams of one wavelength. In some examples, the second light path includes an upstream light beam corresponding to GPON, an upstream light beam corresponding to XG(S)PON, and an upstream light beam corresponding to 50GPON.

[0159] The wavelength combining and demultiplexing filter 4 is used to transmit one of the first light and the second light and reflect the other light to separate the first light and the second light. The degree of the wavelength combining and demultiplexing filter 4 is less than 45°, that is, the incident angle of the wavelength combining and demultiplexing filter 4 is less than 45°, wherein the incident angle is the angle between the incident light and the normal of the wavelength combining and demultiplexing filter 4. In some examples, the degree of the wavelength combining and demultiplexing filter 4 is less than or equal to 13.5°, that is, the incident angle of the wavelength combining and demultiplexing filter 4 is less than or equal to 13.5°. For example, the incident angle of the wavelength combining and demultiplexing filter 4 is 8°, 13° or 13.5°. The wavelength combining and demultiplexing filter 4 can also be called a main filter and a main optical path filter, etc.

[0160] The reflector group 5 is used to realize the return of the first light path or the second light path. The return means that the angle between the incident light incident on the reflector group 5 and the outgoing light emitted from the reflector group 5 is greater than 90° and less than or equal to 180°. In some examples, the reflector group 5 includes a first reflector 51 and a second reflector 52, the first light path or the second light path is incident on the first reflector 51, the first reflector 51 reflects the first light path or the second light path to the second reflector 52, and the second reflector 52 reflects the first light path or the second light path out.

[0161] The technical solution provided by the embodiment of the present disclosure reduces the size of the light emitting component 2 and the light receiving component 3 in the length direction of the package 1 by arranging the light emitting component 2 and the light receiving component 3 in a direction perpendicular to the main optical path A of the bidirectional optical component (for example, arranged in the width direction of the package 1), thereby reducing the length of the bidirectional optical component. In addition, by arranging the reflector group 5 in the bidirectional optical component, the first path of light can still be incident on the wavelength combining and decomposing filter 4, and the second path of light can still be incident on the light receiving component 3, so that the bidirectional optical component can still transmit the first path of light and receive the second path of light.

[0162] When the bidirectional optical component is compatible with the GPON system, the XG(S)PON system and the 50GPON system, it has been verified experimentally that the length of the bidirectional optical component can be less than 25 mm, thus realizing flex PON. Flex PON means that the single board can be used with both XGS / XG PON modules and tri-mode optical modules (i.e., optical modules including the bidirectional optical components provided by the present disclosure), and the pigtail of the tri-mode optical module does not hit the door of the cabinet.

[0163] The following is an example of possible implementation methods in which the wavelength combining and demultiplexing filter 4 outputs the first light emitted by the optical emitting component 2 to the optical window 110, and emits the second light received from the optical window 110, and the reflector group 5 causes the first light emitted by the optical emitting component 2 to be reflected and then incident on the wavelength combining and demultiplexing filter 4, or causes the second light emitted from the wavelength combining and demultiplexing filter 4 to be reflected and then incident on the optical receiving component 3.

[0164] (1) In some examples, such as Figure 4 and Figure 5 As shown, the wavelength combining and demultiplexing filter 4 is used to transmit the first light emitted by the optical emitting component 2 to the optical window 110, and reflect the second light received from the optical window 110 to the optical receiving component 3. The reflector group 5 is located on the optical path between the optical emitting component 2 and the wavelength combining and demultiplexing filter 4, and the reflector group 5 is used to make the first light emitted by the optical emitting component 2 be reflected and then incident on the wavelength combining and demultiplexing filter 4.

[0165] like Figure 4 and Figure 5 As shown, the downlink optical path is: the optical transmitting component 2 transmits the first light to the reflector group 5, the reflector group 5 makes the first light return and then enter the wavelength combining and demultiplexing filter 4, and the wavelength combining and demultiplexing filter 4 transmits the first light to the optical window 110. The uplink optical path is: the wavelength combining and demultiplexing filter 4 reflects the second light received from the optical window 110 to the optical receiving component 3.

[0166] The technical solution provided by the embodiment of the present disclosure is to set the reflector group 5 on the optical path between the optical emitting component 2 and the combining and decomposing filter 4, so that the downstream optical path is folded, thereby enabling the optical emitting component 2 and the optical receiving component 3 to be arranged in a direction perpendicular to the main optical path A (such as the width direction of the package 1), thereby reducing the length of the bidirectional optical component.

[0167] Next, the return angle, that is, the angle between the first light incident on the reflector assembly 5 and the first light emitted from the reflector assembly 5, is described. Figure 4 and Figure 5As shown, since the wavelength combining and decomposing filter 4 is used to transmit the first light through the main light path A to the light window 110, the first light emitted from the reflector group 5 should be coaxial with the main light path A and have the same traveling direction as the light emitting direction of the bidirectional optical component.

[0168] In some examples, such as Figure 4 As shown, the first light incident on the reflector group 5 is parallel to the main light path A, and the traveling direction is opposite to the light emitting direction of the bidirectional optical component. Then, the reflector group 5 turns the first light emitted by the optical emitting component 2 by 180° and then incident on the wavelength combining and decomposing filter 4. In this way, it is convenient for the optical emitting component 2 and the optical receiving component 3 to be arranged along the width direction of the package body 1.

[0169] In some examples, such as Figure 4 As shown, the reflector group 5 includes a first reflector 51 and a second reflector 52. The light emitting assembly 2 is used to emit a first path of light to the first reflector 51. The first reflector 51 is used to reflect the first path of light to the second reflector 52. The second reflector 52 is used to reflect the first path of light to the wavelength combining and decomposing filter 4. The first reflector 51 and the second reflector 52 can both be total reflectors.

[0170] In some examples, such as Figure 4 As shown, the first reflector 51 and the second reflector 52 form an angle of 90°, and the angles between the first reflector 51 and the second reflector 52 and the main optical path A are both 45°, so the first reflector 51 and the second reflector 52 can turn the incident light beam 180° and then reflect it out, thereby realizing the return of the light beam. Figure 5 As shown, the first light incident on the reflector group 5 may not be parallel to the main light path A, and the angle α between the first light incident on the reflector group 5 and the first light emitted from the reflector group 5 may be greater than 90° and less than 180°.

[0171] It is understandable that the smaller the angle α is, the larger the dimension of the package 1 in the width direction occupied by the light emitting assembly 2 will be, so α cannot be too small. For example, the angle α between the first light incident on the reflector assembly 5 and the first light emitted from the reflector assembly 5 can be set to be greater than 140° and less than or equal to 180°.

[0172] (2) In some examples, such as Figure 6 and Figure 7 As shown, the wavelength combining and demultiplexing filter 4 is used to transmit the first light emitted by the optical transmitting component 2 to the optical window 110, and reflect the second light received from the optical window 110. The reflector group 5 is located on the optical path between the wavelength combining and demultiplexing filter 4 and the optical receiving component 3, and the reflector group 5 is used to make the second light reflected by the wavelength combining and demultiplexing filter 4 be folded back and incident on the optical receiving component 3.

[0173] like Figure 6 and Figure 7 As shown, the downlink optical path is: the optical transmitting component 2 transmits the first light to the wavelength combining and demultiplexing filter 4, and the wavelength combining and demultiplexing filter 4 transmits the first light to the optical window 110. The uplink optical path is: the wavelength combining and demultiplexing filter 4 reflects the second light received from the optical window 110 to the reflector group 5, and the reflector group 5 makes the second light return and then incident on the optical receiving component 3.

[0174] By arranging the reflector group 5 on the optical path between the wavelength combining and decomposing filter 4 and the optical receiving component 3, the optical path between the wavelength combining and decomposing filter 4 and the optical receiving component 3 (i.e., the upstream optical path C) is folded. The technical solution provided by the embodiment of the present disclosure can realize the arrangement of the optical transmitting component 2 and the optical receiving component 3 along a direction perpendicular to the main optical path A (such as the width direction of the package 1), thereby reducing the length of the bidirectional optical component.

[0175] Next, the return angle, that is, the angle between the second light incident on the reflector assembly 5 and the second light emitted from the reflector assembly 5, is described. Figure 6 and Figure 7 As shown, since the incident angle of the wavelength combining and demultiplexing filter 4 is constant, the angle between the second light reflected by the wavelength combining and demultiplexing filter 4 and the main light path a is also constant, which is 2β, where β is the degree of the incident angle of the wavelength combining and demultiplexing filter 4.

[0176] In some examples, such as Figure 6 As shown, the second path of light reflected by the reflector group 5 to the light receiving component 3 is parallel to the main light path A, and the traveling direction is opposite to the light emitting direction of the bidirectional optical component. In this way, it is convenient to arrange the light receiving component 3 and the light emitting component 2 in the width direction of the package body 1. And, for this case, after calculation, the angle α between the second path of light incident on the reflector group 5 and the second path of light emitted from the reflector group 5 is 180°-2β. When β is 8°, 13° or 13.5°, α is 164°, 154° and 153° respectively.

[0177] In some examples, such as Figure 6 As shown, the reflector group 5 includes a first reflector 51 and a second reflector 52, the first reflector 51 and the second reflector 52 are located on different sides of the main optical path A, and the second reflector 52 and the light receiving component 3 are located on the same side of the main optical path A. The wavelength combining and decomposing filter 4 is used to reflect the second path of light received from the optical window 110 to the first reflector 51, the first reflector 51 is used to reflect the second path of light to the second reflector 52, and the second reflector 52 is used to reflect the second path of light to the light receiving component 3.

[0178] The technical solution provided by the embodiment of the present disclosure facilitates the arrangement of the reflector group 5 by arranging the first reflector 51 and the second reflector 52 included in the reflector group 5 on different sides of the main optical path A. In other examples, the first reflector 51 and the second reflector 52 may also be located on the same side of the main optical path A, for example, the first reflector 51 and the second reflector 52 are both located on the side where the light receiving component 3 is located.

[0179] In some examples, such as Figure 7 As shown, the second path of light reflected by the reflector group 5 to the light receiving component 3 may also be non-parallel to the main light path A. For example, the second path of light reflected by the reflector group 5 to the light receiving component 3 travels in a direction away from the main light path A (such as Figure 7 As shown). Of course, this will make the width dimension of the package 1 occupied by the light receiving component 3 larger. Alternatively, the second path of light reflected by the reflector group 5 to the light receiving component 3 travels in a direction close to the main light path A. Of course, this may cause the light receiving component 3 to interfere with the light emitting component 2. Therefore, the angle between the second path of light emitted to the light receiving component 3 and the main light path A should not be too large.

[0180] Exemplarily, considering the above factors, the angle α between the second light incident on the reflector group 5 and the second light emitted from the reflector group 5 can be set to be greater than 140° and less than or equal to 180°.

[0181] (3) In some examples, such as Figure 8 As shown, the wavelength combining and demultiplexing filter 4 is used to reflect the first light emitted by the optical transmitting component 2 to the optical window 110, and transmit the second light received from the optical window 110. The reflector group 5 is located on the optical path between the wavelength combining and demultiplexing filter 4 and the optical receiving component 3, and the reflector group 5 is used to make the second light transmitted by the wavelength combining and demultiplexing filter 4 be reflected and then incident on the optical receiving component 3.

[0182] like Figure 8 As shown, the downlink optical path is: the optical transmitting component 2 transmits the first light to the wavelength combining and demultiplexing filter 4, and the wavelength combining and demultiplexing filter 4 reflects the first light to the optical window 110. The uplink optical path is: the wavelength combining and demultiplexing filter 4 transmits the second light received from the optical window 110 to the reflector group 5, and the reflector group 5 makes the second light return and then incident on the optical receiving component 3.

[0183] By arranging the reflector group 5 on the optical path between the wavelength combining and decomposing filter 4 and the optical receiving component 3, the optical path between the wavelength combining and decomposing filter 4 and the optical receiving component 3 (i.e., the upstream optical path C) is folded. The technical solution provided by the embodiment of the present disclosure realizes the arrangement of the optical transmitting component 2 and the optical receiving component 3 along a direction perpendicular to the main optical path A (such as the width direction of the package 1), thereby reducing the length of the bidirectional optical component.

[0184] In some examples, such as Figure 8 As shown, the second light incident on the reflector assembly 5 is coaxial with the main light path A, and the traveling direction is opposite to the light emitting direction of the bidirectional optical component. The second light emitted from the reflector assembly 5 is parallel to the main light path A, and the traveling direction is the same as the light emitting direction of the bidirectional optical component. That is, the reflector assembly 5 turns the second light transmitted by the wavelength combining and decomposing filter 4 by 180° before it is incident on the light receiving component 3.

[0185] In some examples, based on the description of the return angle of the bidirectional optical component in scheme (1), the angle between the second light incident on the reflector group 5 and the second light emitted from the reflector group 5 is set to be greater than 140° and less than or equal to 180°.

[0186] (4) In some examples, such as Fig. 9 As shown, the wavelength combining and demultiplexing filter 4 is used to reflect the first light emitted by the optical emitting component 2 to the optical window 110, and transmit the second light received from the optical window 110 to the optical receiving component 3. The reflector group 5 is located on the optical path between the optical emitting component 2 and the wavelength combining and demultiplexing filter 4, and the reflector group 5 is used to make the first light emitted by the optical emitting component 2 be reflected and then incident on the wavelength combining and demultiplexing filter 4.

[0187] like Fig. 9 As shown, the downlink optical path is: the optical transmitting component 2 transmits the first light to the reflector group 5, the reflector group 5 makes the first light return and then enter the wavelength combining and demultiplexing filter 4, and the wavelength combining and demultiplexing filter 4 reflects the first light to the optical window 110. The uplink optical path is: the wavelength combining and demultiplexing filter 4 transmits the second light received from the optical window 110 to the optical receiving component 3.

[0188] By setting the reflector group 5 on the optical path between the optical emitting component 2 and the combining and demultiplexing filter 4, the optical path between the optical emitting component 2 and the combining and demultiplexing filter 4 (i.e., the downstream optical path B) will be folded. The technical solution provided by the embodiment of the present disclosure realizes the arrangement of the optical emitting component 2 and the optical receiving component 3 along a direction perpendicular to the main optical path A (such as the width direction of the package 1), thereby reducing the length of the bidirectional optical component.

[0189] In some examples, such as Fig. 9 As shown, the light emitted by the optical emitting component 2 is parallel to the main optical path A and has the same light emitting direction as the bidirectional optical component.

[0190] In some examples, such as Fig. 9As shown, the reflector group 5 includes a first reflector 51 and a second reflector 52, the first reflector 51 and the second reflector 52 are located on different sides of the main optical path A, and the first reflector 51 and the optical emission assembly 2 are located on the same side of the main optical path A. The optical emission assembly 2 is used to emit a first path of light to the first reflector 51, the first reflector 51 is used to reflect the first path of light to the second reflector 52, the second reflector 52 is used to reflect the first path of light to the wavelength combining and decomposing filter 4, and the wavelength combining and decomposing filter 4 reflects the first path of light to the light window 110.

[0191] In some examples, based on the description of the return angle of the bidirectional optical component in scheme (2), the angle between the first light incident on the reflector group 5 and the first light emitted from the reflector group 5 is set to be greater than 140° and less than or equal to 180°.

[0192] It should be noted that, based on the relevant descriptions of the above-mentioned schemes (1) to (4), the return may mean that the angle between the light beam (the first light beam or the second light beam) incident on the reflector group 5 and the light beam (the first light beam or the second light beam) emitted from the reflector group 5 is greater than 140° and less than or equal to 180°.

[0193] The internal structures of the optical transmitting component 2 and the optical receiving component 3 are described below by way of example. Figure 10-Figure 16 As shown, the optical transmission component 2 includes a first laser 21, a second laser 22, a third laser 23 and a multiplexer (MUX) 24. The first laser 21 is used to transmit a downstream beam corresponding to 50GPON, the second laser 22 is used to transmit a downstream beam corresponding to XG(S)PON (XGPON or XGSPON), and the third laser 23 is used to transmit a downstream beam corresponding to GPON. The multiplexer 24 is used to multiplex the downstream beam corresponding to 50GPON, the downstream beam corresponding to XG(S)PON and the downstream beam corresponding to GPON into a first path of light.

[0194] The optical receiving component 3 includes a first detection component 31, a second detection component 32, a third detection component 33 and a demultiplexer (DMUX) 34. The demultiplexer 34 is used to demultiplex the received second optical beam into an upstream beam corresponding to GPON, an upstream beam corresponding to XG(S)PON and an upstream beam corresponding to 50GPON. The first detection component 31 is used to receive an upstream beam corresponding to 50GPON, the second detection component 32 is used to receive an upstream beam corresponding to XG(S)PON, and the third detection component 33 is used to receive an upstream beam corresponding to GPON.

[0195] The first detection assembly 31 at least includes a first detector 311, the second detection assembly 32 at least includes a second detector 321, and the third detection assembly 33 at least includes a third detector 331. The above detectors may be avalanche photodiodes (APDs). The specific composition of the first detection assembly 31, the second detection assembly 32, and the third detection assembly 33 will be described below.

[0196] In some examples, such as Figure 10-Figure 16 As shown, the multiplexer 24 includes a first combining prism 241 and a second combining prism 242. The first combining prism 241 is used to combine the light beams emitted by two lasers into one beam, and the second combining prism 242 is used to combine the light beam with the light beam emitted by another laser into one beam.

[0197] For example, Figure 10-12 As shown, the first combining prism 241 is located on the outgoing optical path of the second laser 22 and the third laser 23. The first combining prism 241 is used to combine the light beam λ2 (downstream light beam corresponding to XG(S)PON) emitted by the second laser 22 and the light beam λ3 (downstream light beam corresponding to GPON) emitted by the third laser 23 into a light beam λ2 / λ3, and emit the light beam λ2 / λ3 to the second combining prism 242. The second combining prism 242 is located on the outgoing optical path of the first laser 21. The second combining prism 242 is used to combine the light beam λ1 (downstream light beam corresponding to 50GPON) emitted by the first laser 21 with the light beam λ2 / λ3 into a light beam λ1 / λ2 / λ3. The light beam λ1 / λ2 / λ3 is the first path of light emitted by the optical transmitting assembly 2.

[0198] For example, Figure 13-Figure 16 As shown, the first combining prism 241 is located on the outgoing optical path of the second laser 22 and the first laser 21. The first combining prism 241 is used to combine the light beam λ2 (downlink light beam corresponding to XG(S)PON) emitted by the second laser 22 and the light beam λ1 (downlink light beam corresponding to 50GPON) emitted by the first laser 21 into a light beam λ1 / λ2, and emit the light beam λ1 / λ2 to the second combining prism 242. The second combining prism 242 is located on the outgoing optical path of the third laser 23. The second combining prism 242 is used to combine the light beam λ3 (downlink light beam corresponding to GPON) emitted by the third laser 23 with the light beam λ1 / λ2 into a light beam λ1 / λ2 / λ3. The light beam λ1 / λ2 / λ3 is the first path of light emitted by the optical transmitting assembly 2.

[0199] In some examples, such as Figure 10-12As shown, the optical transmission assembly 2 further includes an isolator 25, which is located on the outgoing light path of the second wave combiner prism 242. The first path of light can only pass through a certain direction of the isolator 25, and the light returning in the opposite direction cannot pass through, thereby preventing a small portion of the reflected light from entering the laser and affecting the signal quality.

[0200] In some examples, such as Figure 10-Figure 16 As shown, the optical emission assembly 2 further includes a first collimating lens 26, a second collimating lens 27 and a third collimating lens 28, which are respectively located on the emission light paths of the first laser 21, the second laser 22 and the third laser 23. The first collimating lens 26 is used to collimate the divergent light emitted by the first laser 21 before it is incident on the multiplexer 24, the second collimating lens 27 is used to collimate the divergent light emitted by the second laser 22 before it is incident on the multiplexer 24, and the third collimating lens 28 is used to collimate the divergent light emitted by the third laser 23 before it is incident on the multiplexer 24. Among them, the collimated light can propagate farther.

[0201] In some examples, such as Figure 10-Figure 16 As shown, the demultiplexer 34 includes a first demultiplexing filter 341 and a second demultiplexing filter 342, and related features will be described below.

[0202] In some examples, such as Figure 10-12 As shown, the bidirectional optical assembly provided by the embodiment of the present disclosure further includes a fiber collimating lens 8, which is located on the main optical path A and is used to focus the emitted first light onto the end face of the optical fiber, and to collimate the divergent second light received from the optical fiber into parallel light, and then transmit it to the wavelength combining and decomposing filter 4. The fiber collimating lens 8 can be located inside the tube shell 11 and opposite to the light window 110. In other examples, such as Fig.16 As shown, the optical fiber collimating lens 8 can also be arranged inside the optical fiber socket 9.

[0203] In some examples, such as Fig.16 As shown, the bidirectional optical component provided by the embodiment of the present disclosure further includes a fiber optic receptacle (subscriber connector / standard connector, SC receptacle) 9, in which a single-mode fiber optic ferrule is arranged for docking with a fiber optic plug.

[0204] Next, combine Figure 10-12 , a more detailed exemplary description is given of the optical path of the bidirectional optical component in the above scheme (1).

[0205] The emission of the first light path (downstream light path): the first laser 21, the second laser 22 and the third laser 23 emit light beams λ1, λ2 and λ3 respectively. Light beams λ3 and λ2 are collimated by the third collimating lens 28 and the second collimating lens 27 respectively, and then enter the first multiplexing prism 241. The first multiplexing prism 241 combines light beams λ3 and λ2 into light beams λ2\λ3, and light beams λ2\λ3 enter the second multiplexing prism 242. In addition, after light beam λ1 is collimated by the first collimating lens 26, it is also incident on the second multiplexing prism 242. The second multiplexing prism 242 combines light beams λ2\λ3 and light beam λ1 into light beams λ1\λ2\λ3, which are the first light paths. Afterwards, the light beams λ1\λ2\λ3 pass through the isolator 25, and then are reflected after passing through the reflector group 5. The reflected light beams λ1\λ2\λ3 are incident on the wavelength combining and decomposing filter 4, and are transmitted through the wavelength combining and decomposing filter 4 to the fiber collimating lens 8. The fiber collimating lens 8 focuses the light beams λ1\λ2\λ3 onto the end face of the fiber.

[0206] Reception of the second light path (uplink light path): The divergent light (i.e., the second light path) including the light beam λa (uplink light beam corresponding to 50GPON), the light beam λb (uplink light beam corresponding to XG(S)PON), and the light beam λc (uplink light beam corresponding to GPON) incident from the optical window 110 is collimated by the optical fiber collimating lens 8 and becomes collimated light. After the light beams λa\λb\λc are incident on the wavelength combining and demultiplexing filter 4, they are reflected by the wavelength combining and demultiplexing filter 4 to the first wavelength demultiplexing filter 341. The first wavelength demultiplexing filter 341 demultiplexes the light beams λa\λb\λc into the light beams λa and λb\λc, transmits the light beam λa to the first detection component 31, and reflects the light beams λb\λc to the second wavelength demultiplexing filter 342. The second wavelength demultiplexing filter 342 demultiplexes the light beams λb\λc into the light beams λb and λc, transmits the light beam λb to the second detection component 32, and reflects the light beam λc to the third detection component 33.

[0207] The first wave splitting filter 341 and the second wave splitting filter 342 may have a degree less than 45°, and further less than or equal to 13.5°, for example, they may be 8° filters, 13° filters, and 13.5° filters. In some examples, the first wave splitting filter 341 and the second wave splitting filter 342 are both 8° filters.

[0208] In some examples, such as Fig.12As shown, the above-mentioned wave combining and demultiplexing filter 4, the first wave splitting filter 341 and the second wave splitting filter 342 can be replaced by a zblock, that is, the above-mentioned wave combining and demultiplexing filter 4, the first wave splitting filter 341 and the second wave splitting filter 342 can be attached to a diamond-shaped glass 340, so as to ensure that the angles of the wave combining and demultiplexing filter 4, the first wave splitting filter 341 and the second wave splitting filter 342 are more accurate and easier to control, such as easier to ensure parallelism. In addition, more reflections can be performed inside the zblock to improve isolation.

[0209] Next, combine Figure 13-Figure 16 , a more detailed exemplary description is given of the optical path of the bidirectional optical component in the above scheme (2).

[0210] The emission of the first light path (downstream light path): the first laser 21, the second laser 22 and the third laser 23 emit light beams λ1, λ2 and λ3 respectively. Light beams λ1 and λ2 are incident on the first wave-combining prism 241 through the first collimating lens 26 and the second collimating lens 27 respectively. The first wave-combining prism 241 combines light beams λ1 and λ2 into light beams λ1\λ2, and light beams λ1\λ2 enter the second wave-combining prism 242. In addition, after light beam λ3 is collimated by the third collimating lens 28, it is also incident on the second wave-combining prism 242. The second wave-combining prism 242 combines light beams λ1\λ2 and λ3 into light beams λ1\λ2\λ3, which are the first light paths. Afterwards, light beams λ1\λ2\λ3 are incident on the wave-combining and decombining filter 4, and are transmitted to the light window 110 through the wave-combining and decombining filter 4.

[0211] Reception of the second light path (upward light path): The light beam λa / λb / λc (i.e., the second light path) comprising the light beam λa, the light beam λb, and the light beam λc incident from the light window 110 is incident on the wavelength combining and demultiplexing filter 4. The wavelength combining and demultiplexing filter 4 reflects the light beams λa / λb / λc to the reflector group 5, and the reflector group 5 folds the light beams λa / λb / λc back and reflects them to the first wavelength demultiplexing filter 341. The first wavelength demultiplexing filter 341 demultiplexes the light beams λa / λb / λc into the light beams λa and λb / λc, transmits the light beam λa to the first detection assembly 31, and reflects the light beams λb / λc to the second wavelength demultiplexing filter 342. The second wavelength splitting filter 342 splits the light beam λb / λc into the light beam λb and the light beam λc, transmits the light beam λb to the second detection component 32, reflects the light beam λc to the third wavelength splitting filter 343, and the third wavelength splitting filter 343 reflects the light beam λc to the third detection component 33.

[0212] The first wave splitting filter 341, the second wave splitting filter 342 and the third wave splitting filter 343 may all have a degree less than 45°, and further less than or equal to 13.5°, for example, they may be 8° filters, 13° filters and 13.5° filters. In some examples, the first wave splitting filter 341, the second wave splitting filter 342 and the third wave splitting filter 343 are all 8° filters.

[0213] In some examples, such as Fig.15 As shown, the first wave splitting filter 341, the second wave splitting filter 342 and the third wave splitting filter 343 can be replaced by a zblock, that is, the first wave splitting filter 341, the second wave splitting filter 342 and the third wave splitting filter 343 are attached to a diamond-shaped glass 340, so that the angles of the first wave splitting filter 341, the second wave splitting filter 342 and the third wave splitting filter 343 are more accurate and easier to control, such as easier to ensure parallelism. In addition, more reflections can be performed inside the zblock to improve isolation.

[0214] In some examples, such as Fig.15 As shown, the second detection component 32 and the third detection component 33 can be integrated into a two-channel detection component.

[0215] Since the optical emitting component 2 and the optical receiving component 3 are packaged in the same package body 1, the optical receiving component 3 is easily affected by the optical signal emitted by the optical emitting component 2 and the electrical signal radiated by the optical emitting component 2. Among them, compared with the optical receiving component 3, the optical signal emitted by the optical emitting component 2 and the electrical signal radiated are both stronger. Therefore, the optical signal emitted by the optical emitting component 2 and the electrical signal radiated are both called strong signals, and the optical signal received by the optical receiving component 3 and the electrical signal of the optical receiving component 3 are called weak signals. Strong signals are easy to interfere with the optical receiving component 3, and since the optical emitting component 2 and the optical receiving component 3 are arranged in a direction perpendicular to the main optical path A (such as the width direction of the package body 1), the arrangement of the optical emitting component 2 and the optical receiving component 3 is more compact, so the interference will be more serious.

[0216] In order to reduce the influence of the strong signal of the optical transmitting component 2 on the weak signal of the optical receiving component 3, in some examples, such as Fig.29 As shown, and refer to Fig.17 and Fig.18 The package body 1 has a main chamber 10 and an isolation chamber 120, and the isolation chamber 120 is connected to the main chamber 10 through an opening 122. The light emitting component 2 is located in the main chamber 10. The light receiving component 3 has a detector 301, which is located in the isolation chamber 120 and is used to receive the second path of light through the opening 122. The inner diameter of the opening 122 is smaller than the inner diameter of the isolation chamber 120.

[0217] The technical solution provided by the embodiment of the present disclosure is to provide a main chamber 10 and an isolation chamber 120 inside the packaging body 1, and to set the light emitting component 2 in the main chamber 10, and to set the detector 301 of the light receiving component 3 in the isolation chamber 120, so that the optical signal emitted by the light emitting component 2 and the radiated electrical signal are not likely to affect the detector 301, and the isolation chamber 120 has a good photoelectric isolation effect, so that the receiving performance of the detector 301 is not deteriorated due to crosstalk.

[0218] In some examples, such as Fig.17 , Fig.18 and Fig.29 As shown, the light receiving component 3 further includes a trans-impedance amplifier (TIA) 302 , which is used to convert the current signal of the detector 301 into a voltage signal, and the trans-impedance amplifier 302 is also located inside the isolation chamber 120 .

[0219] The embodiment of the present disclosure does not limit the implementation method of the isolation chamber 120. In some examples, such as Figure 17-Figure 18 , Figure 19-20 , Figure 23-Figure 24 and Figure 29-Figure 30 As shown, the package body 1 includes a tube shell 11 and a first gasket 12, and the first gasket 12 is located inside the tube shell 11. An isolation chamber 120 is provided between the bottom of the first gasket 12 and the tube shell 11, a main chamber 10 is provided between the top of the first gasket 12 and the tube shell 11, and the first gasket 12 has an opening 122.

[0220] The technical solution provided by the embodiment of the present disclosure provides an isolation chamber 120 between the bottom of the first cushion block 12 and the tube shell 11, so that the emission of the first light and the reception of the second light are not at the same level, which also reduces the interference of the first light emitted by the optical emitting component 2 on the detector 301 to a certain extent.

[0221] In some examples, such as Fig.21 and Fig.25 As shown, the bottom of the first cushion block 12 has a groove 121 , the groove 121 is communicated with the opening 122 , and an isolation chamber 120 is formed between the groove 121 and the bottom wall of the tube shell 11 .

[0222] In some examples, such as Figure 17-Figure 18 , Figure 19-20 , Figure 23-Figure 24 and Figure 29-Figure 30As shown, the light receiving assembly 3 further includes a receiving reflector 303, which is located in the main chamber 10 and is used to reflect the second path of light downward to the isolation chamber 120 through the opening 122. The receiving reflector 303 may be a total reflector.

[0223] The technical solution provided by the embodiment of the present disclosure is to set a receiving reflector 303 to reflect the second light downward through the opening 122 to the isolation chamber 120, so that the receiving direction of the detector 301 is perpendicular to the downlink light (the first light), which also plays a role in isolating the downlink stray light leaked from the optical transmitting component 2.

[0224] In some examples, such as Fig.17 , Fig.18 and Fig.29 As shown, the light receiving component 3 further includes a filter 304 , which is located on the light incident side of the receiving reflector 303 , or on the light path between the receiving reflector 303 and the detector 301 .

[0225] The filter 304 may be a 0° filter, and the filter 304 may be used to transmit the light beam that the detector 301 needs to receive and filter out other light beams. The technical solution provided by the embodiment of the present disclosure further improves the optical signal isolation performance of the isolation chamber 120 by sealing the light inlet of the isolation chamber 120 with the filter 304.

[0226] In some examples, such as Fig.17 and Fig.18 As shown, the light receiving assembly 3 further includes a focusing lens 305, which is used to focus the light reflected by the receiving reflector 303 onto the detection surface of the detector 301. Next, the first detection assembly 31, the second detection assembly 32 and the third detection assembly 33 are exemplarily described.

[0227] In some examples, such as Fig. 20 , Fig. 22 , Fig.24 and Fig.26 As shown, the first detection assembly 31 includes a first detector 311, a first transimpedance amplifier 312, a first receiving reflector 313, a first filter 314 and a first focusing lens 315. Fig. 22 and Fig.26 As shown, the light beam λa is incident on the first filter 314, and is transmitted to the first receiving reflector 313 through the first filter 314. The first receiving reflector 313 reflects the light beam λa to the first focusing lens 315, and the first focusing lens 315 focuses the light beam λa to the first detector 311. The first filter 314 is used to transmit the upstream light beam corresponding to 50GPON (the central wavelength is 1286nm) and filter out light of other wavelengths.

[0228] In some examples, such as Fig. 20 , Fig. 22 , Fig.24 and Fig.26 As shown, the second detection assembly 32 includes a second detector 321, a second transimpedance amplifier 322, a second receiving reflector 323, a second filter 324 and a second focusing lens 325. Fig. 22 and Fig.26 As shown, the light beam λb is incident on the second filter 324, and is transmitted to the second receiving reflector 323 through the second filter 324. The second receiving reflector 323 reflects the light beam λb to the second focusing lens 325, and the second focusing lens 325 focuses the light beam λb to the second detector 321. The second filter 324 is used to transmit the upstream light beam (central wavelength is 1270nm) corresponding to the XG(S)PON, and filter out light of other wavelengths.

[0229] In some examples, such as Fig. 20 , Fig. 22 , Fig.24 and Fig.26 As shown, the third detection assembly 33 includes a third detector 331, a third transimpedance amplifier 332, a third receiving reflector 333, a third filter 334 and a third focusing lens 335. Fig. 22 and Fig.26 As shown, the light beam λc is incident on the third filter 334, and is transmitted to the third receiving reflector 333 through the third filter 334. The third receiving reflector 333 reflects the light beam λc to the third focusing lens 335. The third focusing lens 335 focuses the light beam λc to the third detector 331. The third filter 334 is used to transmit the upstream light beam (central wavelength is 1310nm) corresponding to GPON, and filter out light of other wavelengths.

[0230] The embodiment of the present disclosure does not limit the number of isolation chambers 120. In some examples, there is one isolation chamber 120, and all detectors 301 are located in the same isolation chamber 120. Then, the isolation chamber 120 can isolate the strong signal of the optical emission component 2 from the weak signal of the detector 301. In other examples, there can be multiple isolation chambers 120, and at least two detectors 301 are located in different isolation chambers 120. Then, the isolation chamber 120 can also isolate the weak signals of the two detectors 301.

[0231] Since the first detector 311 receives the uplink beam corresponding to 50GPON, and 50GPON requires a high transmission rate, the frequency of the electrical signal of the first detector 311 is relatively high, which is easy to interfere with other detectors. On the other hand, the sensitivity index margin of the first detector 311 is small, so the first detector 311 is required to be subjected to small crosstalk, otherwise the crosstalk will produce an unacceptable sensitivity cost.

[0232] Therefore, in some examples, there are two or three isolation chambers 120, and the first detector 311 is located in one isolation chamber 120, and the second detector 321 and the third detector 331 are located in another or other two isolation chambers 120, that is, at least the first detector 311 is isolated from the other two detectors to avoid interference with the first detector 311 and to avoid the first detector 311 interfering with other detectors.

[0233] In some examples, such as Fig.19 and Fig. 20 As shown, there are three isolation chambers 120, and the first detector 311, the second detector 321 and the third detector 331 are respectively located in the three isolation chambers 120. Fig.21 As shown, the bottom of the first cushion block 12 has three grooves 121, and has three openings 122 that penetrate the first cushion block 12 in the thickness direction and are connected to the grooves 121. The first cushion block 12 is buckled on the bottom wall 112 (the inner side) of the tube shell 11, and the three isolation chambers 120 are formed between the three grooves 121 and the bottom wall 112. In other examples, such as Fig.23 and Fig.24 As shown, there are two isolation chambers 120, the first detector 311 is located in one isolation chamber 120, and the second detector 321 and the third detector 331 are located in the other isolation chamber 120. For example, Fig.25 As shown, the bottom of the first cushion block 12 has two grooves 121 and three openings 122 that penetrate the first cushion block 12 in the thickness direction. The first cushion block 12 is buckled on the bottom wall 112 of the tube shell 11, and the two isolation chambers 120 are formed between the two grooves 121 and the bottom wall 112. Among them, one of the three openings 122 is connected to the groove 121 where the first detector 311 is located, and the other two openings 122 are connected to the other groove 121.

[0234] In some examples, such as Fig. 27 As shown, the bidirectional optical component provided in the embodiment of the present disclosure further includes a first pin 6 and a second pin 7, the first pin 6 and the second pin 7 penetrate the package body 1 (such as the tube shell 11), and one is electrically connected to the optical transmitting component 2, and the other is electrically connected to the optical receiving component 3. Among them, the first pin 6 and the second pin 7 can be pin needles or pads. Below, the specific positions of the first pin 6 and the second pin 7 are exemplarily described.

[0235] The optical emitting component 2 and the optical receiving component 3 are arranged along the width direction of the package body 1, so the first pin 6 and the second pin 7 are not convenient to penetrate the same side wall 111 of the package body 1, but are more convenient to penetrate the two side walls 111 arranged along the thickness direction of the package body 1 respectively. However, after the optical emitting component 2 and the optical receiving component 3 are arranged along the width direction of the package body 1, the size occupied by the optical emitting component 2 and the optical receiving component 3 in the width direction of the package body 1 will become larger. Therefore, if the first pin 6 and the second pin 7 are respectively arranged to penetrate the two side walls 111 arranged along the thickness direction of the package body 1, the width of the package body 1 and the bidirectional optical component will be larger. In order to reduce the impact on the width of the bidirectional optical component, in some examples, such as Fig. 27 As shown, the first pin 6 passes through the side wall 111 of the package body 1 , and the second pin 7 passes through the bottom wall 112 of the package body 1 .

[0236] The embodiment of the present disclosure does not limit which of the first pin 6 and the second pin 7 is electrically connected to the optical emitting component 2 and which is electrically connected to the optical receiving component 3. In some examples, the first pin 6 is electrically connected to the optical emitting component 2, and the second pin 7 is electrically connected to the optical receiving component 3. This connection method also facilitates the placement of the detector 301 in the isolation chamber 120 between the tube shell 11 and the first cushion block 12.

[0237] For example, in order to facilitate the electrical connection between the first pin 6 and the optical emitting assembly 2, the light emitting direction of the laser is parallel to the bottom wall 112 of the package body 1, and the laser is electrically connected to the first pin 6. Fig.11 , Fig.14 and Fig.16 As shown, the light emitting direction of the laser is away from the side wall 111 through which the first pin 6 passes. The laser is the first laser 21, the second laser 22 or the third laser 23.

[0238] For example, in order to facilitate the electrical connection between the second pin 7 and the light receiving component 3 (such as the detector 301 and the transimpedance amplifier 302 and other electrical devices), Fig.17 and Fig.18 As shown, the light receiving assembly 3 includes a detector 301 and a receiving reflector 303. The detection surface of the detector 301 faces upwards. The receiving reflector 303 is used to reflect the second path of light downwards to the detector 301. The detector 301 is electrically connected to the second pin 7. The second pin 7 can be welded with a flexible board.

[0239] The first pin 6 can be used to power the laser 20 and provide a driving signal for the laser 20. The second pin 7 can be used to power the detector 301 and export the electrical signal converted by the detector 301.

[0240] like Fig.28FIG. 1 shows an exploded view of a bidirectional optical component. Fig.28 As can be seen in FIG. 1 , the package body 1 includes a tube shell 11 , a first spacer 12 , a thermo electric cooler (TEC) 13 and a second spacer 14 .

[0241] The tube shell 11 can be a metal tube shell or a ceramic tube shell. The tube shell 11 is a container for all electrical and optical devices, and has three main functions: first, it has a light window 110 for light to enter and exit; second, it is used to connect the pins (first pin 6 or second pin 7) for electrical signals to enter and exit. The pins are bonded to the chip through gold wires inside the tube shell 11 and connected to the circuit board through welding soft boards outside; third, it has a sealing function, and the cap is sealed under inert gas to ensure airtightness.

[0242] The first pad 12 can be a metal pad. A groove 121 is provided at the bottom of the first pad 12. The first pad 12 is attached to the tube shell 11, and the groove 121 covers the corresponding detector 301. An isolation chamber 120 is formed between the groove 121 and the bottom wall of the tube shell 11. The isolation chamber 120 forms a shielding protection for the received signal. The first pad 12 is provided with three narrow openings 122 for the incoming light signal. At the same time, the upper surface of the first pad 12 can be used to place optical elements, for example, the first receiving reflector 313, the first filter 314, the second receiving reflector 323, the second filter 324, the third receiving reflector 333, the third filter 334, the first split wave filter 341, the second split wave filter 342, the third split wave filter 343, the combined split wave filter 4 and the reflector group 5.

[0243] TEC13 is placed under the laser, and its function is to cool the laser, stabilize the temperature of the laser and stabilize the laser output wavelength. The material of the second pad 14 is aluminum nitride (ALN), so the second pad 14 can also be called an ALN ​​pad. The second pad 14 is placed between the laser and TEC13, and has a step on the upper surface. Its main function is to control the height difference between the laser and the collimating lens, and ensure that the divergent light emitted by the laser can be collimated by the collimating lens.

[0244] The embodiment of the present disclosure also provides a bidirectional optical component, which can reduce the interference of the optical transmitting component 2 on the optical receiving component 3. The bidirectional optical component is exemplarily described below.

[0245] like Fig.29 and Fig.30As shown, the bidirectional optical component includes a package body 1, an optical transmitting component 2, an optical receiving component 3 and a wavelength combining and demultiplexing filter 4. The package body 1 has a main chamber 10, an isolation chamber 120 and a light window 110, and the isolation chamber 120 is connected to the main chamber 10 through an opening 122. The optical transmitting component 2 and the wavelength combining and demultiplexing filter 4 are located in the main chamber 10, the optical transmitting component 2 is used to transmit a first path of light, and the wavelength combining and demultiplexing filter 4 is used to output the first path of light to the light window 110, and emit the second path of light received from the light window 110. The optical receiving component 3 has a detector 301, the detector 301 is located in the isolation chamber 120, and the detector 301 is used to receive the second path of light through the opening 122.

[0246] The bidirectional optical component provided in the embodiment of the present disclosure may be a bidirectional optical component compatible with a GPON system, an XG(S)PON system, and a 50GPON system, or may be other bidirectional optical components.

[0247] The package 1 is a package 1 using a box packaging technology, and the package 1 may also be called a packaging box or a box package, etc. For details of the package 1, please refer to the above related description.

[0248] The optical transmitting component 2 is used to transmit the first path of light, and the first path of light is the downstream light. The first path of light may include light beams of multiple wavelengths, or may include only light beams of one wavelength. In some examples, the first path of light includes a downstream light beam corresponding to GPON, a downstream light beam corresponding to XGSPON or XGPON, and a downstream light beam corresponding to 50GPON. For details of the optical transmitting component 2, please refer to the above-mentioned related descriptions. The optical receiving component 3 is used to receive the second path of light, and the second path of light is the upstream light. The second path of light may include light beams of multiple wavelengths, or may include only light beams of one wavelength. In some examples, the second path of light includes an upstream light beam corresponding to GPON, an upstream light beam corresponding to XGSPON or XGPON, and an upstream light beam corresponding to 50GPON. For details of the optical receiving component 3, please refer to the above-mentioned related descriptions.

[0249] The optical emitting assembly 2 and the optical receiving assembly 3 can be arranged in a direction perpendicular to the main optical path A of the bidirectional optical assembly, or can be arranged along the main optical path A. The embodiment of the present disclosure does not limit the arrangement of the optical emitting assembly 2 and the optical receiving assembly 3. For example, the optical emitting assembly 2 and the optical receiving assembly 3 can also be arranged in a direction perpendicular to the main optical path A of the bidirectional optical assembly. Figure 3 The wavelength combining and demultiplexing filter 4 is used to transmit one of the first light and the second light and reflect the other light to separate the first light and the second light. For details of the wavelength combining and demultiplexing filter 4, please refer to the above related description.

[0250] The technical solution provided by the embodiment of the present disclosure is to provide a main chamber 10 and an isolation chamber 120 inside the packaging body 1, and to set the light emitting component 2 in the main chamber 10, and to set the detector 301 of the light receiving component 3 in the isolation chamber 120, so that the optical signal emitted by the light emitting component 2 and the radiated electrical signal are not likely to affect the detector 301, and the isolation chamber 120 has a good photoelectric isolation effect, thereby ensuring that the receiving performance of the detector 301 is not degraded due to crosstalk.

[0251] Next, the formation method of the isolation chamber 120 is exemplarily described.

[0252] In some examples, such as Figure 19-20 , Figure 23-Figure 24 and Figure 29-Figure 30 As shown, the package body 1 includes a tube shell 11 and a first gasket 12, and the first gasket 12 is located inside the tube shell 11. An isolation chamber 120 is provided between the bottom of the first gasket 12 and the tube shell 11, a main chamber 10 is provided between the top of the first gasket 12 and the tube shell 11, and the first gasket 12 has an opening 122.

[0253] The technical solution provided by the embodiment of the present disclosure provides an isolation chamber 120 between the bottom of the first cushion block 12 and the tube shell 11, so that the emission of the first light and the reception of the second light are not at the same level, which also reduces the interference of the first light emitted by the optical emitting component 2 on the detector 301 to a certain extent.

[0254] In some examples, such as Fig.21 and Fig.25 As shown, the bottom of the first cushion block 12 has a groove 121, the groove 121 is connected to the opening 122, and an isolation chamber 120 is formed between the groove 121 and the tube shell 11. In other examples, a cover body can also be arranged between the bottom of the first cushion block 12 and the tube shell 11, the cover body covers the detector 301, and the inside of the cover body has an isolation chamber. The first cushion block 12 has an opening 122, and the opening 122 is connected to the inside of the cover body.

[0255] In some examples, such as Figure 17-Figure 18 , Figure 19-20 , Figure 23-Figure 24 and Figure 29-Figure 30 As shown, the light receiving assembly 3 further includes a receiving reflector 303 , which is located in the main chamber 10 , and is used to reflect the second path of light downward to the isolation chamber 120 through the opening 122 .

[0256] The technical solution provided by the embodiment of the present disclosure is to set a receiving reflector 303 to reflect the second light downward through the opening 122 to the isolation chamber 120, so that the receiving direction of the detector 301 is perpendicular to the downlink light (the first light), which also plays a role in isolating the downlink stray light leaked from the optical transmitting component 2.

[0257] In some examples, such as Fig.17 , Fig.18 and Fig.29 As shown, the light receiving component 3 further includes a transimpedance amplifier 302 , which is used to convert the current signal of the detector 301 into a voltage signal, and the transimpedance amplifier 302 is also located inside the isolation chamber 120 .

[0258] In some examples, such as Fig.17 , Fig.18 and Fig.29 As shown, the optical receiving assembly 3 also includes a filter 304, which is located on the light-incoming side of the receiving reflector 303, or on the optical path between the receiving reflector 303 and the detector 301. The filter 304 can be a 0° filter, which can be used to transmit the light beam that the detector 301 needs to receive and filter out other light beams. The technical solution provided by the embodiment of the present disclosure further improves the optical signal isolation performance of the isolation chamber 120 by sealing the light inlet of the isolation chamber 120 with the filter 304.

[0259] In some examples, such as Fig.17 and Fig.18 As shown, the light receiving assembly 3 further includes a focusing lens 305 , which is used to focus the light reflected by the receiving reflector 303 onto the detection surface of the detector 301 .

[0260] In some other examples, the isolation chamber 120 may also be formed in the following manner: the main chamber 10 of the package 1 has a cover inside, the cover has an isolation chamber and an opening, and the detector 301 is located in the isolation chamber of the cover. In some examples, the cover is located on the first cushion block 12.

[0261] In some examples, such as Figure 10-Figure 16As shown, the optical receiving assembly 3 further includes a demultiplexer 34, and there are three detectors 301, which are respectively a first detector 311, a second detector 321, and a third detector 331. The demultiplexer 34 is located in the main chamber 10, and is used to demultiplex the second path of light into an upstream beam corresponding to GPON, an upstream beam corresponding to XGPON or XGSPON, and an upstream beam corresponding to 50GPON. The first detector 311 is used to receive the upstream beam corresponding to 50GPON, the second detector 321 is used to receive the upstream beam corresponding to XGPON or XGSPON, and the third detector 331 is used to receive the upstream beam corresponding to GPON.

[0262] The embodiment of the present disclosure does not limit the number of isolation chambers 120. In some examples, there is one isolation chamber 120, and all detectors 301 are located in the same isolation chamber 120, so that the isolation chamber 120 can play a role in isolating the strong signal of the optical emission component 2 and the weak signal of the detector 301. In other examples, there can also be multiple isolation chambers 120, and at least two detectors 301 are located in different isolation chambers 120, so that the isolation chamber 120 can also play a role in isolating the weak signals of the two detectors 301.

[0263] Since the first detector 311 receives the uplink beam corresponding to 50GPON, and 50GPON requires a high transmission rate, the frequency of the electrical signal of the first detector 311 is relatively high, which is easy to interfere with other detectors. On the other hand, the sensitivity index margin of the first detector 311 is small, so the first detector 311 is required to be subjected to small crosstalk, otherwise the crosstalk will produce an unacceptable sensitivity cost.

[0264] Therefore, in some examples, such as Fig.19 and Fig. 20 as well as Fig.23 and Fig.24 As shown, there are two or three isolation chambers 120, and the first detector 311 is located in one isolation chamber 120, and the second detector 321 and the third detector 331 are located in another or other two isolation chambers 120, that is, at least the first detector 311 is isolated from the other two detectors to avoid interference with the first detector 311 and to avoid the first detector 311 interfering with other detectors.

[0265] In some examples, such as Fig.19 and Fig. 20 As shown, there are three isolation chambers 120, and the first detector 311, the second detector 321 and the third detector 331 are respectively located in the three isolation chambers 120. Fig.21As shown, the bottom of the first cushion block 12 has three grooves 121, and has three openings 122 that penetrate the first cushion block 12 in the thickness direction and are respectively connected to the three grooves 121. The first cushion block 12 is buckled on the bottom wall 112 of the tube shell 11, and the three isolation chambers 120 are formed between the three grooves 121 and the bottom wall 112.

[0266] In other examples, such as Fig.23 and Fig.24 As shown, there are two isolation chambers 120, the first detector 311 is located in one isolation chamber 120, and the second detector 321 and the third detector 331 are located in the other isolation chamber 120. For example, Fig.25 As shown, the bottom of the first cushion block 12 has two grooves 121 and three openings 122 that penetrate the first cushion block 12 in the thickness direction. The first cushion block 12 is buckled on the bottom wall 112 of the tube shell 11, and the two isolation chambers 120 are formed between the two grooves 121 and the bottom wall 112. Among them, one of the three openings 122 is connected to the groove 121 where the first detector 311 is located, and the other two openings 122 are connected to the other groove 121.

[0267] In some examples, such as Fig. 27 As shown, the bidirectional optical component further includes a first pin 6 and a second pin 7, the first pin 6 passes through the side wall 111 of the package body 1, and is electrically connected to the optical emitting component 2. The second pin 7 passes through the bottom wall 112 of the package body 1, and is electrically connected to the detector 301. For details, please refer to the above description of the first pin 6 and the second pin 7, which will not be repeated here.

[0268] In some examples, such as Figure 4-Figure 16 As shown, the optical transmitting component 2 and the optical receiving component 3 are arranged in a direction perpendicular to the main optical path A of the bidirectional optical component. The bidirectional optical component further includes a reflector group 5, which is located in the main chamber 10. The reflector group 5 is used to make the first light emitted by the optical transmitting component 2 bend back and then be incident on the wavelength combining and demultiplexing filter 4, or make the second light emitted from the wavelength combining and demultiplexing filter 4 bend back and then be incident on the optical receiving component 3.

[0269] In some examples, such as Figure 4-Figure 5 and Figure 10-12 As shown, the wavelength combining and demultiplexing filter 4 is used to transmit the first light emitted by the optical emitting component 2 to the optical window 110, and reflect the second light received from the optical window 110 to the optical receiving component 3. The reflector group 5 is located on the optical path between the optical emitting component 2 and the wavelength combining and demultiplexing filter 4, and the reflector group 5 is used to make the first light emitted by the optical emitting component 2 be reflected and then incident on the wavelength combining and demultiplexing filter 4. For the specific content, please refer to the relevant content of the above-mentioned scheme (1), which will not be repeated here.

[0270] In some examples, such as Figure 4 As shown, the first light incident on the reflector assembly 5 is parallel to the main light path A, and the traveling direction is opposite to the light output direction of the bidirectional optical component. The first light emitted from the reflector assembly 5 is coaxial with the main light path A, and the traveling direction is the same as the light output direction of the bidirectional optical component.

[0271] In some examples, such as Figure 6-Figure 7 and Figure 13-Figure 16 As shown, the wavelength combining and demultiplexing filter 4 is used to transmit the first path of light emitted by the optical transmitting component 2 to the optical window 110, and reflect the second path of light received from the optical window 110. The reflector group 5 is located on the optical path between the wavelength combining and demultiplexing filter 4 and the optical receiving component 3, and the reflector group 5 is used to make the second path of light reflected by the wavelength combining and demultiplexing filter 4 be reflected and incident on the optical receiving component 3. For the specific content, please refer to the relevant content of the above-mentioned scheme (2), which will not be repeated here.

[0272] In some examples, such as Figure 6 As shown, the second path of light reflected by the reflector group 5 to the light receiving component 3 is parallel to the main light path A, and the traveling direction is opposite to the light emitting direction of the bidirectional optical component.

[0273] In some examples, such as Figure 6-Figure 7 and Figure 13-Figure 16 As shown, the reflector group 5 includes a first reflector 51 and a second reflector 52, the first reflector 51 and the second reflector 52 are located on different sides of the main optical path A, and the second reflector 52 and the light receiving component 3 are located on the same side of the main optical path A. The wavelength combining and decomposing filter 4 is used to reflect the second path of light received from the optical window 110 to the first reflector 51, the first reflector 51 is used to reflect the second path of light to the second reflector 52, and the second reflector 52 is used to reflect the second path of light to the light receiving component 3.

[0274] In some examples, such as Figure 8 As shown, the wavelength combining and demultiplexing filter 4 is used to reflect the first light emitted by the optical transmitting component 2 to the optical window 110, and transmit the second light received from the optical window 110. The reflector group 5 is located on the optical path between the wavelength combining and demultiplexing filter 4 and the optical receiving component 3, and the reflector group 5 is used to make the second light transmitted by the wavelength combining and demultiplexing filter 4 be reflected and incident on the optical receiving component 3. For the specific content, please refer to the relevant content of the above-mentioned solution (3), which will not be repeated here.

[0275] In some examples, such as Fig. 9As shown, the wavelength combining and demultiplexing filter 4 is used to reflect the first light emitted by the optical emitting component 2 to the optical window 110, and transmit the second light received from the optical window 110 to the optical receiving component 3. The reflector group 5 is located on the optical path between the optical emitting component 2 and the wavelength combining and demultiplexing filter 4, and the reflector group 5 is used to make the first light emitted by the optical emitting component 2 be reflected and then incident on the wavelength combining and demultiplexing filter 4. For the specific content, please refer to the relevant content of the above-mentioned scheme (4), which will not be repeated here.

[0276] In some examples, such as Figure 10-Figure 16 As shown, the optical transmission component 2 includes a first laser 21, a second laser 22, a third laser 23 and a multiplexer 24. The first laser 21 is used to transmit a downstream light beam corresponding to 50GPON, the second laser 22 is used to transmit a downstream light beam corresponding to XGPON or XGSPON, the third laser 23 is used to transmit a downstream light beam corresponding to GPON, and the multiplexer 24 is used to multiplex the downstream light beam corresponding to 50GPON, the downstream light beam corresponding to XGPON or XGSPON, and the downstream light beam corresponding to GPON into a first light path.

[0277] The optical receiving component 3 includes a demultiplexer 34 and three detectors 301, the three detectors 301 are respectively a first detector 311, a second detector 321 and a third detector 331, the demultiplexer 34 is located in the main chamber 10, the demultiplexer 34 is used to demultiplex the second path of light into an upstream beam corresponding to GPON, an upstream beam corresponding to XGPON or XGSPON and an upstream beam corresponding to 50GPON, the first detector 311 is used to receive an upstream beam corresponding to 50GPON, the second detector 321 is used to receive an upstream beam corresponding to XGPON or XGSPON, and the third detector 331 is used to receive an upstream beam corresponding to GPON. For details, please refer to the above description of the internal structure of the optical transmitting component 2 and the optical receiving component 3, which will not be repeated here.

[0278] It should be noted that the second bidirectional optical component provided in the embodiment of the present disclosure can be the same as the first bidirectional optical component. Therefore, the relevant features of the second bidirectional optical component provided in the embodiment of the present disclosure can refer to the relevant features of the first bidirectional optical component, and the repeated content will not be repeated.

[0279] The embodiment of the present disclosure also provides an optical module. The optical module includes a circuit board and the above-mentioned bidirectional optical component. The length direction of the optical module is the insertion direction of the optical module, and the length direction of the optical module is parallel to the main optical path of the bidirectional optical component. The optical module is used to be inserted into an optical network device such as an OLT device, and the circuit board can be a printed circuit board (PCB).

[0280] In some examples, the circuit board is electrically connected to both the first pin 6 and the second pin 7 of the bidirectional optical component. The circuit board is used to supply power to the optical transmitting component 2 (laser) through the first pin 6 and transmit a driving signal, and is also used to supply power to the optical receiving component 3 (detector 301) through the second pin 7 and receive the electrical signal converted by the optical receiving component 3 (detector 301).

[0281] The embodiment of the present disclosure also provides an optical network device, which includes a single board and the above optical module. The optical network device may be an OLT device, and the optical module may be plugged into the single board, which is a service board.

[0282] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. "Multiple" refers to two or more, unless otherwise clearly defined.

[0283] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A bidirectional optical component, characterized in that: The bidirectional optical component comprises a packaging body (1), a light transmitting component (2), a light receiving component (3) and a wavelength combining and decomposing filter (4), wherein: The package (1) comprises a main chamber (10), an isolation chamber (120) and a light window (110); the isolation chamber (120) is connected to the main chamber (10) via an opening (122); The light emitting component (2) and the wavelength combining and decomposing filter (4) are located in the main chamber (10); the light emitting component (2) is used to emit a first path of light; the wavelength combining and decomposing filter (4) is used to output the first path of light to the light window (110) and to emit a second path of light received from the light window (110); The light receiving component (3) has a detector (301), and the detector (301) is located in the isolation chamber (120). The detector (301) is used to receive the second path of light through the opening (122).

2. The bidirectional optical component according to claim 1, characterized in that: The package body (1) comprises a tube shell (11) and a first cushion block (12), wherein the first cushion block (12) is located inside the tube shell (11); The isolation chamber (120) is provided between the bottom of the first cushion block (12) and the tube shell (11), the main chamber (10) is provided between the top of the first cushion block (12) and the tube shell (11), and the first cushion block (12) has the opening (122).

3. The bidirectional optical component according to claim 2, characterized in that: The bottom of the first cushion block (12) has a groove (121), the groove (121) is in communication with the opening (122), and the isolation chamber (120) is formed between the groove (121) and the tube shell (11).

4. The bidirectional optical component according to claim 2 or 3, characterized in that: The light receiving assembly (3) further comprises a receiving reflector (303), wherein the receiving reflector (303) is located in the main chamber (10), and the receiving reflector (303) is used to reflect the second path of light downwardly through the opening (122) to the isolation chamber (120).

5. The bidirectional optical component according to claim 4, characterized in that: The light receiving component (3) further comprises a filter (304), wherein the filter (304) is located on the light-incoming side of the receiving reflector (303), or located on the light path between the receiving reflector (303) and the detector (301).

6. The bidirectional optical component according to any one of claims 1 to 5, characterized in that: The optical receiving component (3) further comprises a demultiplexer (34); the detector (301) comprises a first detector (311), a second detector (321) and a third detector (331); The demultiplexer (34) is located in the main chamber (10), and the demultiplexer (34) is used to demultiplex the second light into an upstream light beam corresponding to GPON, an upstream light beam corresponding to XGPON or XGSPON, and an upstream light beam corresponding to 50GPON; the first detector (311) is used to receive the upstream light beam corresponding to 50GPON; the second detector (321) is used to receive the upstream light beam corresponding to XGPON or XGSPON; and the third detector (331) is used to receive the upstream light beam corresponding to GPON; There are two or three isolation chambers (120); the first detector (311) is located in one of the isolation chambers (120); the second detector (321) and the third detector (331) are located in another isolation chamber (120), or respectively located in another two isolation chambers (120).

7. The bidirectional optical component according to any one of claims 1 to 6, characterized in that: The bidirectional optical component further comprises a first pin (6) and a second pin (7); The first pin (6) passes through the side wall (111) of the package body (1) and is electrically connected to the light emitting component (2); The second pin (7) passes through the bottom wall (112) of the package body (1) and is electrically connected to the detector (301).

8. The bidirectional optical component according to any one of claims 1 to 7, characterized in that: The optical transmitting component (2) and the optical receiving component (3) are arranged in a direction perpendicular to the main optical path (A) of the bidirectional optical component; The bidirectional optical component further comprises a reflector group (5), wherein the reflector group (5) is located in the main chamber (10), and the reflector group (5) is used to make the first light emitted by the optical transmitting component (2) be reflected and then incident on the wavelength combining and demultiplexing filter (4), or to make the second light emitted from the wavelength combining and demultiplexing filter (4) be reflected and then incident on the optical receiving component (3).

9. The bidirectional optical component according to claim 8, characterized in that: The wavelength combining and decomposing filter (4) is used to transmit the first path of light emitted by the light emitting component (2) to the light window (110), and to reflect the second path of light received from the light window (110) to the light receiving component (3); The reflector group (5) is located on the optical path between the light emitting component (2) and the wavelength combining and demultiplexing filter (4), and the reflector group (5) is used to make the first path of light emitted by the light emitting component (2) be reflected and then incident on the wavelength combining and demultiplexing filter (4).

10. The bidirectional optical component according to claim 9, characterized in that: The first path of light incident on the reflector group (5) is parallel to the main light path (A), and the traveling direction is opposite to the light output direction of the bidirectional optical component; The first path of light emitted from the reflector group (5) is coaxial with the main light path (A), and the traveling direction is the same as the light emitting direction of the bidirectional optical component.

11. The bidirectional optical assembly according to claim 8, characterized in that: The wavelength combining and decomposing filter (4) is used to transmit the first path of light emitted by the light emitting component (2) to the light window (110), and to reflect the second path of light received from the light window (110) to the reflector group (5); The reflector group (5) is located on the optical path between the wavelength combining and decomposing filter (4) and the light receiving component (3), and the reflector group (5) is used to make the second path of light reflected by the wavelength combining and decomposing filter (4) be folded back and then incident on the light receiving component (3).

12. The bidirectional optical assembly according to claim 11, characterized in that: The second path of light reflected by the reflector group (5) to the light receiving component (3) is parallel to the main light path (A), and the traveling direction is opposite to the light emitting direction of the bidirectional optical component.

13. The bidirectional optical assembly according to claim 11 or 12, characterized in that: The reflector group (5) comprises a first reflector (51) and a second reflector (52), wherein the first reflector (51) and the second reflector (52) are located on different sides of the main light path (A), and the second reflector (52) and the light receiving component (3) are located on the same side of the main light path (A); The wavelength combining and decomposing filter (4) is used to reflect the second path of light received from the optical window (110) to the first reflector (51), the first reflector (51) is used to reflect the second path of light to the second reflector (52), and the second reflector (52) is used to reflect the second path of light to the optical receiving component (3).

14. The bidirectional optical assembly according to claim 8, characterized in that: The wavelength combining and decomposing filter (4) is used to reflect the first path of light emitted by the light emitting component (2) to the light window (110), and transmit the second path of light received from the light window (110) to the reflector group (5); The reflector group (5) is located on the optical path between the wavelength combining and decomposing filter (4) and the light receiving component (3), and the reflector group (5) is used to make the second path of light transmitted by the wavelength combining and decomposing filter (4) be reflected and then incident on the light receiving component (3).

15. The bidirectional optical assembly according to claim 8, characterized in that: The wavelength combining and decomposing filter (4) is used to reflect the first path of light emitted by the light emitting component (2) to the light window (110), and transmit the second path of light received from the light window (110) to the light receiving component (3); The reflector group (5) is located on the optical path between the light emitting component (2) and the wavelength combining and demultiplexing filter (4), and the reflector group (5) is used to make the first path of light emitted by the light emitting component (2) be reflected and then incident on the wavelength combining and demultiplexing filter (4).

16. An optical module, characterized in that: The optical module comprises a circuit board and the bidirectional optical component according to any one of claims 1 to 15, and the circuit board is electrically connected to the bidirectional optical component.

17. An optical network device, characterized in that: The optical network device comprises a single board and the optical module as claimed in claim 16, and the optical module is plugged into the single board.

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