Optical communication device, optical device, and method for assembling optical device

Abstract

The present application discloses an optical communication device, an optical device, and an assembly method for the optical device, which relate to the optical communications field. The optical device includes an optical connector, multiple filters, an optical emitting device, and an optical receiving device. The optical emitting device includes a first laser emitter, a second laser emitter, and a third laser emitter, which respectively emit optical signals of three different communication protocols. The optical receiving device includes a first optical receiver, a second optical receiver, and a third optical receiver, which respectively receive the optical signals of the three different communication protocols. The multiple filters separate the optical signals of the three different communication protocols introduced through the optical connector and introduce them to the first optical receiver, the second optical receiver, and the third optical receiver, respectively. The optical signals of the three different communication protocols emitted by the first laser emitter, the second laser emitter, and the third laser emitter are further combined, and the combined optical signal is introduced to the optical connector. Therefore, the optical device can simultaneously receive and emit GPON optical signals, 10G PON optical signals, and 50G PON optical signals.

Description

[Technical Field]

[0001] This application claims priority to Chinese Patent Application No. 202211525974.2, entitled "OPTICAL COMMUNICATION DEVICE, OPTICAL DEVICE, AND ASSEMBLING METHOD FOR OPTICAL DEVICE," filed with the State Intellectual Property Office of China on December 1, 2022, which is incorporated herein by reference in its entirety.

[0002] The present application relates to the field of optical communication technology, and in particular to optical communication devices, optical devices, and methods for assembling optical devices. [Background technology]

[0003] In the nearly 20-year evolution of PON (passive optical network) optical networks, two generations of products, GPON (gigabit-capable PON) and 10G PON (10Gbit / s PON), have been successively commercialized, achieving a leap from 100 Mbit / s networks to 1000 Mbit / s networks.

[0004] As optical network requirements continue to increase, 50G PON (50Gbit / s PON, 50G-capable passive optical network) products are emerging in the industry. However, existing optical transceivers cannot meet the requirements for simultaneously receiving and emitting GPON optical signals, 10G PON optical signals, and 50G PON optical signals. Summary of the Invention

[0005] Embodiments of the present application provide an optical communication device, an optical device, and an assembly method for an optical device to meet the requirements for simultaneously receiving / emitting GPON optical signals, 10G PON optical signals, and 50G PON optical signals. [Means for solving the problem]

[0006] To achieve the aforementioned objectives, the following technical solutions are used in this application:

[0007] According to a first aspect, an embodiment of the present application provides an optical device. The optical device includes an optical connector, an optical emitting device, an optical receiving device, and a plurality of filters. The optical emitting device includes a first laser emitter, a second laser emitter, and a third laser emitter. The first laser emitter, the second laser emitter, and the third laser emitter are configured to emit optical signals of three different communication protocols, respectively. The three different communication protocols may be a first communication protocol used for a 10G PON protocol, a second communication protocol used for a 50G PON protocol, and a third communication protocol used for a GPON protocol. Thus, the first communication protocol includes a modulated optical signal having a receiving rate of 10 Gbps and a wavelength range of 1260 nm to 1280 nm, and a received modulated electrical signal having a rate of 10 Gbps and being converted into a modulated optical signal having a wavelength range of 1575 nm to 1580 nm for emission. The second communication protocol includes a modulated optical signal having a receiving rate of 50 Gbps and a wavelength range of 1284 nm to 1288 nm, and a receiving modulated electrical signal having a rate of 50 Gbps and converted to a modulated optical signal having a wavelength range of 1340 nm to 1344 nm for emission. The third communication protocol includes a modulated optical signal having a receiving rate of 1.25 Gbps and a wavelength range of 1290 nm to 1330 nm, and a receiving modulated electrical signal having a rate of 2.5 Gbps and converted to a modulated optical signal having a wavelength range of 1480 nm to 1490 nm for emission. In addition to the three communication protocols, the optical signals of the three different communication protocols emitted by the first laser emitter, the second laser emitter, and the third laser emitter in this embodiment of the present application may be of another communication protocol. Details will not be repeated here.

[0008] In addition, the optical receiving device includes a first optical receiver, a second optical receiver, and a third optical receiver. The first optical receiver, the second optical receiver, and the third optical receiver are configured to receive optical signals of three different communication protocols. The received optical signals of three different communication protocols herein may also be optical signals of the first communication protocol, optical signals of the second communication protocol, and optical signals of the third communication protocol, or optical signals of another communication protocol. The optical signals of each communication protocol may be received by one optical receiver and emitted by one laser emitter in the optical device.

[0009] The optical device further includes a plurality of filters, the plurality of filters being spaced apart. The plurality of filters includes a first filter group, a second filter group, a third filter group, and a fourth filter group. The first filter group is located in a receiving optical path of the first optical receiver and is configured to introduce optical signals of a first communication protocol among the optical signals introduced from the optical connector into the first optical receiver and to derive optical signals of a second communication protocol and optical signals of a third communication protocol among the optical signals of the three different communication protocols. The second filter group is located on the optical path from the first filter group to the second optical receiver and is configured to introduce optical signals of one communication protocol transmitted by the first filter group into the second optical receiver and enable optical signals of the other communication protocol to be derive. The third filter group is located on the optical path from the second filter group to the third optical receiver and is configured to introduce optical signals derive from the second filter group into the third optical receiver. Therefore, the optical device in this embodiment of the present application can meet the requirements for simultaneously receiving GPON optical signals, 10G PON optical signals, and 50G PON optical signals. The fourth filter group is located on the output optical paths of the first laser emitter, the second laser emitter, and the third laser emitter. The fourth filter group is configured to combine the optical signal of the first communication protocol emitted by the first laser emitter, the optical signal of the first communication protocol emitted by the second laser emitter, and the optical signal of the third communication protocol emitted by the third laser emitter, and introduce the combined optical signal into the optical connector. Therefore, the optical device in this embodiment of the present application can meet the requirements for simultaneously emitting GPON optical signals, 10G PON optical signals, and 50G PON optical signals.

[0010] In addition, the optical device further includes a housing, and the multiple filters are all located within the housing. The optical connector, the optical emitting device, and the optical receiving device may be disposed within the housing. For example, the optical port of the optical connector, the optical output port of the optical emitting device, and the optical input port of the optical receiving device are all located within the housing. When multiple filters are attached to the housing, assembly errors are likely to occur, changing the filter branching curves and resulting in inaccurate branching. In particular, filters with small spatial intervals have a significant impact on the accuracy of branching the optical path. Therefore, in some embodiments, a mounting surface is formed on the inner wall of the housing. At least one side of the multiple filters is bonded to the mounting surface. When the filter is bonded to the mounting surface, a side line or corner of the filter may be used as an adjustment reference to ensure the filter's mounting position and angle are accurate. Therefore, the mounting error of the multiple filters can be reduced to less than ±0.3°, ensuring the branching accuracy of the filters in the optical device.

[0011] In some embodiments of the present application, the optical device further includes a Z-block filter assembly, which includes at least one of the plurality of filters and an adjustment support kit. All of the filters in the Z-block filter assembly may be disposed on the adjustment support kit. Specifically, the adjustment support kit may be an adjustment prism or an adjustment support. The adjustment support kit may be connected to the housing by a bonding method. Similarly, when the adjustment support kit is bonded to the inner wall of the housing, the side line or corner of the adjustment support kit may be used as an adjustment reference, thereby ensuring accurate mounting positions and mounting angles of all of the filters in the Z-block filter assembly. Therefore, the mounting error of the plurality of filters may be reduced to a value of less than ±0.3°, ensuring the demultiplexing accuracy of the filters in the optical device.

[0012] In addition, in some other embodiments, the optical device further includes one or more adjustment frames, which may be connected to the inner wall of the housing. For example, the adjustment frames may be connected to the inner wall of the housing in a jointed manner. In addition, the number of adjustment frames may be equal to the number of filters, or may be less than the number of filters. When there is only one adjustment frame, one of the multiple filters is attached to the adjustment frame. When there are multiple adjustment frames and the number of adjustment frames is equal to the number of filters, the multiple filters may be assembled in one-to-one correspondence with the multiple adjustment frames. When there are multiple adjustment frames and the number of adjustment frames is less than the number of filters, some of the multiple filters may be assembled in one-to-one correspondence with the multiple adjustment frames. Therefore, different spatial sizes within the housing can be accommodated while ensuring the demultiplexing accuracy of the filters in the optical device.

[0013] Additionally, in some embodiments, the mounting angle may be manually adjusted using the adjustment frame. In some other embodiments, the optical device further includes a drive piece, such as a drive motor, which is connected to the adjustment frame in a driving manner. In this case, the mounting angle of the filter is automatically adjusted.

[0014] The distribution of the multiple filters varies depending on the implementation and distribution method of the optical emitting device and the optical receiving device in the optical device. In some embodiments, the first filter group includes a first filter and a second filter sequentially arranged in a light incident direction of the first optical receiver. The first filter is arranged facing the optical connector and is configured to reflect an optical signal of a first communication protocol within an optical signal including three different communication protocols among the optical signals introduced through the optical connector to the second filter, thereby enabling transmission of an optical signal of a second communication protocol and an optical signal of a third communication protocol within the optical signal including the three different communication protocols. The second filter is configured to reflect the optical signal reflected by the first filter to the first optical receiver. The second filter group includes a third filter and a fourth filter sequentially arranged in the light incidence direction of the second optical receiver. The third filter is located on the transmission optical path of the first filter and configured to reflect the optical signal of the second communication protocol transmitted by the first filter to the fourth filter, thereby enabling transmission of the optical signal of the third communication protocol. The fourth filter is configured to reflect the optical signal reflected by the third filter to the second optical receiver. The third filter group includes a fifth filter and a sixth filter sequentially arranged in the light incidence direction of the third optical receiver. The fifth filter is located on the transmission optical path of the third filter and configured to reflect the optical signal of the third communication protocol transmitted by the third filter to the sixth filter. The sixth filter is configured to reflect the optical signal reflected by the fifth filter to the optical receiver.

[0015] Additionally, the fifth filter, the third filter, and the first filter are all located on an optical path between the light emitting device and the optical connector, and are sequentially arranged in a light emission direction of the light emitting device, and are further configured to enable the optical signal of the first communication protocol emitted by the first laser emitter, the optical signal of the second communication protocol emitted by the second laser emitter, and the optical signal of the third communication protocol emitted by the third laser emitter to be combined and introduced into the optical connector.

[0016] Based on the above description, in some embodiments, the first filter group further includes a seventh filter located on the reflected optical path of the second filter, the seventh filter being arranged opposite the first optical receiver and configured to remove impurity optical signals in the optical signal reflected by the second filter and allow the filtered optical signal to be transmitted to the first optical receiver, and to prevent the impurity optical signals from entering the first optical receiver, the second optical receiver, and the third optical receiver. The second filter group further includes an eighth filter located on the reflected optical path of the fourth filter, the eighth filter being arranged opposite the second optical receiver and configured to remove impurity optical signals in the optical signal reflected by the fourth filter and allow the filtered optical signal to be transmitted to the second optical receiver. The third filter group further includes a ninth filter located on the reflected optical path of the sixth filter, the ninth filter being disposed opposite the third optical receiver and configured to remove impurity optical signals in the optical signal reflected by the sixth filter and enable the filtered optical signal to be transmitted to the third optical receiver.

[0017] In an optical device where the space within the housing is small due to the distribution of the filters, the optical device further includes three adjustment frames connected to the inner wall of the housing. The three adjustment frames are a first adjustment frame, a second adjustment frame, and a third adjustment frame. The second filter is attached to the first adjustment frame. The fourth filter is attached to the second adjustment frame. The sixth filter is attached to the third adjustment frame. Therefore, with this optical device, the installation error of the multiple filters can be reduced to a value of less than ±0.3°, ensuring the branching accuracy of the filters in the optical device.

[0018] In some other embodiments of the present application, the first filter group includes a first filter, a second filter, and a third filter arranged sequentially in a direction of light incidence on the first optical receiver. The first filter is arranged facing the optical connector and is configured to reflect an optical signal including three different communication protocols and introduced through the optical connector to the second filter. The second filter is configured to reflect the optical signal including the three different communication protocols to the third filter. The third filter includes three different communication protocols and is configured to reflect the optical signal of the second communication protocol and the optical signal of the third communication protocol within the optical signal reflected by the second filter, thereby allowing the optical signal of the first communication protocol within the optical signal including the three different communication protocols to be transmitted to the first optical receiver. The second filter group includes a fourth filter located on the optical path from the third filter to the second optical receiver. The fourth filter is configured to reflect the optical signal of the third communication protocol within the optical signal reflected by the third filter, allowing the optical signal of the second communication protocol to be transmitted to the second optical receiver. The third filter group includes a fifth filter located on the optical path from the fourth filter to the third optical receiver. The fifth filter is configured to reflect the optical signal of the third communication protocol reflected by the fourth filter to the third optical receiver.

[0019] In addition, based on this, a first filter is positioned on the optical path between the optical emitting device and the optical connector, and the first filter is further configured to allow the optical signal of the first communication protocol emitted by the first laser emitter, the optical signal of the second communication protocol emitted by the second laser emitter, and the optical signal of the third communication protocol emitted by the third laser emitter to be combined and introduced into the optical connector.

[0020] Similarly, the first filter group further includes a sixth filter located on the transmission optical path of the third filter, the sixth filter facing the first optical receiver and configured to remove impurity optical signals from the optical signal transmitted by the third filter and transmit the optical signal to the first optical receiver, preventing the impurity optical signals from entering the first, second, and third optical receivers. The second filter group further includes a seventh filter located on the transmission optical path of the fourth filter, the seventh filter facing the second optical receiver and configured to remove impurity optical signals from the optical signal transmitted by the fourth filter and transmit the optical signal to the second optical receiver. The third filter group further includes an eighth filter located on the reflection optical path of the fifth filter, the eighth filter facing the third optical receiver and configured to remove impurity optical signals from the optical signal reflected by the fifth filter and transmit the optical signal to the third optical receiver.

[0021] In optical devices where the space within the housing is small due to the distribution of filters, the optical device further includes three adjustment frames connected to the inner wall of the housing. The three adjustment frames are a first adjustment frame, a second adjustment frame, and a third adjustment frame. The second filter is attached to the first adjustment frame. The third filter is attached to the second adjustment frame. The fourth or fifth filter is attached to the third adjustment frame. Therefore, with this optical device, the installation error of the multiple filters can be reduced to a value of less than ±0.3°, ensuring the filter separation accuracy of the optical device.

[0022] Based on the above description, in some embodiments of the present application, the optical path from the second laser emitter to the optical connector intersects with the optical path from the third laser emitter to the optical connector. The plurality of filters further includes a tenth filter and an eleventh filter. The tenth filter is disposed at an intersection of the optical path from the second laser emitter to the optical connector and the optical path from the third laser emitter to the optical connector. The tenth filter is configured to combine and derive an optical signal of a second communication protocol emitted by the second laser emitter and an optical signal of a third communication protocol emitted by the third laser emitter. The optical path from the first laser emitter to the optical connector intersects with the output optical path of the tenth filter. The eleventh filter is disposed at an intersection of the optical path from the first laser emitter to the optical connector and the output optical path of the tenth filter. In addition, the eleventh filter is configured to combine the optical signal derived from the tenth filter with the optical signal of the first communication protocol emitted by the first laser emitter and introduce the combined optical signal into the optical connector.

[0023] Additionally, in some embodiments of the present application, the optical device further includes a first collimating lens and a second collimating lens, where the first collimating lens is disposed at an optical port of the optical connector near the inside of the housing. The second collimating lens is disposed in the output optical paths of the first laser emitter, the second laser emitter, and the third laser emitter. The second collimating lens is configured to convert the optical signals emitted by the first laser emitter, the second laser emitter, and the third laser emitter from converging light into parallel light. The first collimating lens is configured to convert the converging light introduced through the optical connector into parallel light, and is further configured to convert the parallel light output through the second collimating lens into converging light.

[0024] Additionally, in some embodiments of the present application, the optical device further includes an isolator, the isolator being disposed on each of the output optical paths of the first laser emitter, the second laser emitter, and the third laser emitter. In some examples, there is one isolator, and the isolator is disposed at an intersection of the output optical paths of the first laser emitter, the second laser emitter, and the third laser emitter. For example, the isolator is located between the output optical path of the eleventh filter and the second collimating lens. The isolator may simultaneously avoid optical signal crosstalk between the first laser emitter, the second laser emitter, and the third laser emitter. In some other examples, there may be three isolators, the three isolators being disposed on the output optical paths of the first laser emitter, the second laser emitter, and the third laser emitter, respectively. Therefore, each of the three isolators can independently avoid optical signal crosstalk of the corresponding laser emitter.

[0025] In some embodiments of the present application, the first laser emitter, the second laser emitter, and the third laser emitter in the light emitting device are independently mounted and arranged and distributed at intervals on the housing.

[0026] In some embodiments of the present application, any two of the first laser emitter, the second laser emitter, and the third laser emitter in the light-emitting device are integrated into a single structure, and the remaining one is independently mounted and arranged. The volume of the light-emitting device is small. This allows for the miniaturization of optical devices.

[0027] In some embodiments of the present application, the first laser emitter, the second laser emitter, and the third laser emitter in the light-emitting device are integrated into a single structure. The volume of the light-emitting device is small. This allows for the miniaturization of optical devices.

[0028] Similarly, in some embodiments of the present application, the first optical receiver, the second optical receiver, and the third optical receiver are each independently mounted and arranged and distributed at intervals on the housing.

[0029] In some embodiments of the present application, any two of the first optical receiver, the second optical receiver, and the third optical receiver in the optical receiving device are integrally mounted in an integrated structure, and the remaining one is independently mounted and arranged. The volume of the optical receiving device is small. This allows for the miniaturization of the optical device.

[0030] In some embodiments of the present application, the first optical receiver, the second optical receiver, and the third optical receiver are integrated into a single structure, which reduces the volume of the optical receiver, thereby enabling the miniaturization of the optical device.

[0031] Based on the above description, whether the first laser emitter, the second laser emitter, the third laser emitter, the first optical receiver, the second optical receiver, and the third optical receiver are independently or integrally mounted, the mounting form may be a coaxial mounting or a box mounting.

[0032] According to a second aspect, an embodiment of the present application further includes an optical communication device. The optical communication device may be a PON device, such as an optical line termination device, an optical network unit device, or an optical network device, or may be an optical module. The optical communication device includes a circuit board and an optical device described in the above embodiment, and the optical device is electrically connected to the circuit board. The optical device in the optical communication device in this embodiment of the present application and the optical device in the above embodiment have the same structure, and both can solve the same technical problem and achieve the same technical effect. Details will not be repeated here.

[0033] According to a third aspect, an embodiment of the present application includes a method for assembling the optical device in the above-described embodiment. The assembly method specifically includes the following steps: attaching a plurality of filters to preset reference positions in a housing, where at least one filter is fixedly attached to an adjustment frame and the adjustment frame is movably connected to the housing; inputting detection light into the optical connector and sequentially adjusting the attachment angles of the filters in the optical path arrangement using the adjustment frame until the beams of detection light derived or introduced from the plurality of filters reach a preset angle; and fastening the adjustment frame to the housing.

[0034] According to a fourth aspect, an embodiment of the present application further includes another assembly method for the optical device in the above-described embodiment. The assembly method specifically includes the following steps: applying adhesive to a mounting surface in a housing based on a preset mounting position of a filter in the housing; attaching a side surface of the filter to the adhesive layer on the mounting surface and adjusting the mounting angle of the filter using a side line or a corner of the filter as a mounting reference until the mounting angle reaches the preset mounting angle; and curing the adhesive layer between the side surface of the filter and the mounting surface.

[0035] According to a fifth aspect, an embodiment of the present application further includes another assembly method for the optical device in the above-described embodiment. The assembly method specifically includes the following steps: movably mounting a filter and a Z-block filter assembly at a preset reference position in a housing; inputting detection light into an optical connector and adjusting the mounting angle of the Z-block filter assembly in the housing until a beam of detection light derived from the filter and the Z-block filter assembly reaches a preset angle; and fastening the Z-block filter assembly to the housing.

[0036] In order to explain the technical solutions in the embodiments of the present application, the following briefly describes the accompanying drawings necessary for the embodiments of the present application. [Brief explanation of the drawings]

[0037] [Figure 1] 1 is a schematic diagram of the structure present when the optical communication device is an optical modem, according to an embodiment of the present application; [Figure 2] 1 is a schematic diagram of a structure of a circuit board assembly in an optical communication device according to an embodiment of the present application; [Figure 3] 1 is a schematic diagram of an optical device having one laser emitter and one optical receiver. [Figure 4] 1 is a schematic diagram of an optical device including two laser emitters and two optical receivers. [Figure 5] 1 is a schematic diagram of a cross section of an optical device according to an embodiment of the present application; [Figure 6] 1 is a schematic diagram of a three-dimensional structure of a housing in an optical device according to an embodiment of the present application; [Figure 7] 10 is a schematic diagram showing a partial structure of an optical device in which a filter is attached to a fastening frame. FIG. [Figure 8] 1 is a schematic diagram of a cross section of an optical device in which a housing has a mounting surface, according to an embodiment of the present application. [Figure 9] 1 is a schematic diagram of a three-dimensional structure of a filter in an optical device according to an embodiment of the present application; [Figure 10] 1 is a schematic diagram of a structure in which a filter in an optical device is bonded to a mounting surface of a housing according to an embodiment of the present application; [Figure 11] 1 is a schematic diagram of a cross section of an optical device including a Z-block filter assembly according to an embodiment of the present application. [Figure 12] 1 is a schematic diagram of a three-dimensional structure of a Z-block filter assembly in an optical device according to an embodiment of the present application. [Figure 13] 1 is a schematic diagram of a structure of an assembly of a filter and an adjustment frame in an optical device from a first perspective according to an embodiment of the present application; [Figure 14]10 is a schematic diagram of a second view of the structure of an assembly of a filter and an adjustment frame in an optical device according to an embodiment of the present application; FIG. [Figure 15] 10A-10C illustrate adjusting the angle of a filter in an optical device according to an embodiment of the present application. [Figure 16] FIG. 1 is a schematic diagram of an assembly of a filter and a driving piece in an optical device according to an embodiment of the present application. [Figure 17] 2 is a schematic diagram of an optical path between an optical receiving device and an optical connector in the optical device of the first embodiment. FIG. [Figure 18] 3 is a schematic diagram of an optical path between a light emitting device and an optical connector in the optical device of Example 1. FIG. [Figure 19] 1 is a schematic diagram of an optical path between an optical receiving device and an optical connector in an optical device having a parasitic light filtering function according to a first embodiment. [Figure 20] 1 is a schematic diagram of an optical path between a light emitting device and an optical connector in an optical device with a parasitic light filtering function of Example 1. FIG. [Figure 21] 1 is a schematic diagram illustrating the configuration of an optical device including three adjustment frames according to a first embodiment. [Figure 22] 1 is a schematic diagram illustrating the configuration of an optical device in which a housing has a mounting surface in Example 1. FIG. [Figure 23] FIG. 10 is a schematic diagram illustrating the configuration of an optical device according to a second embodiment. [Figure 24] FIG. 10 is a schematic diagram illustrating the configuration of an optical device according to a third embodiment. [Figure 25] FIG. 10 is a schematic diagram of an optical path between an optical receiving device and an optical connector in an optical device according to a fourth embodiment. [Figure 26] 10 is a schematic diagram of an optical path between a light emitting device and an optical connector in an optical device of Example 4. FIG. [Figure 27] FIG. 10 is a schematic diagram of an optical path between an optical receiving device and an optical connector in an optical device having a parasitic light filtering function according to a fourth embodiment. [Figure 28]10 is a schematic diagram of an optical path between a light emitting device and an optical connector in an optical device with a parasitic light filtering function of Example 4. FIG. [Figure 29] FIG. 10 is a schematic diagram illustrating the configuration of an optical device including three adjustment frames according to a fourth embodiment. [Figure 30] FIG. 10 is a schematic diagram illustrating the configuration of an optical device according to a fifth embodiment. [Figure 31] FIG. 10 is a schematic diagram illustrating the configuration of an optical device according to a sixth embodiment. [Figure 32] FIG. 13 is a schematic diagram illustrating the configuration of an optical device according to a seventh embodiment. [Figure 33] FIG. 13 is a schematic diagram illustrating the configuration of an optical device according to an eighth embodiment. [Figure 34] FIG. 13 is a schematic diagram illustrating the configuration of an optical device according to a ninth embodiment. [Figure 35] FIG. 20 is a schematic diagram illustrating the configuration of an optical device according to a tenth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0038] To make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings.

[0039] Terms such as "first" and "second" referred to below are for descriptive purposes only and should not be understood as an indication or implication of relative importance or an implicit indication of the quantity of the technical features indicated. Thus, features qualified by "first," "second," etc. may explicitly or implicitly include one or more features. In the description of this application, unless otherwise specified, "plurality" means two or more than two.

[0040] Additionally, in this application, directional terms such as "up," "down," "left," "right," "horizontal," and "vertical" are defined relative to the orientation in which components are generally disposed in the accompanying drawings. It should be understood that these directional terms are relative concepts used for relative description and clarity, and may change appropriately based on changes in the orientation in which components are disposed in the accompanying drawings.

[0041] In this application, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, the term "connection" may refer to a connection of mechanical structures or a connection of physical structures. For example, the connection may be a fixed connection, a detachable connection, an integrated connection, a direct connection, or an indirect connection by using an intermediate medium. The connection may also be understood as components being in physical and conductive contact, or as different components in a line structure being connected via a physical line capable of transmitting electrical signals, such as a PCB copper foil or a conductor wire.

[0042] An embodiment of the present application includes an optical communication device. The optical communication device may be a PON device, such as an optical line terminal (OLT) device, an optical network unit (ONU) device, an optical network terminal (ONT), or an optical module (optical transceiver). The optical network device may specifically be an optical modem. The optical module may be used in the optical line terminal device or in a communication network device, such as a router. In addition, the optical module may be an on-board optical module or a pluggable optical module.

[0043] FIG. 1 illustrates a solution in which the optical communication device is an optical modem. The optical modem 1000 includes a circuit board 100 and an optical device 200 as shown in FIG. 2. The optical device 200 is electrically connected to the circuit board 100. The optical device 200 may specifically be an optical transceiver device. The circuit board 100 may further include other circuits, chips, chip packaging structures, etc., which will not be described one by one in detail here. The optical device 200 may perform signal transmission with other circuits, chips, or chip packaging structures on the circuit board 100.

[0044] To meet the requirements of optical communication networks for receiving and transmitting optical signals containing different communication protocols, optical transceiver devices may have different structures. For example, when optical signals of only one communication protocol need to be received and transmitted, an optical device 200 may include one laser emitter 20 and one optical receiver 30, as shown in FIG. 3. For example, the laser emitter 20 is configured to emit optical signals of the GPON protocol. The optical receiver 30 is configured to receive optical signals of the GPON protocol.

[0045] When optical signals of two different communication protocols need to be received and transmitted, as shown in FIG. 4 , the optical device 200 may include two laser emitters 20a and 20b and two optical receivers 30a and 30b. The two optical receivers 30a and 30b are configured to receive optical signals of the two different communication protocols, respectively. The two laser emitters 20a and 20b are configured to transmit optical signals of the two different communication protocols, respectively. For example, the laser emitter 20a is configured to emit optical signals of the GPON protocol. The laser emitter 20b is configured to transmit optical signals of the 10G PON protocol. The optical receiver 30a is configured to receive optical signals of the GPON protocol. The optical receiver 30b is configured to receive optical signals of the 10G PON protocol. Therefore, the optical device 200 is a combo PON device and can meet the requirements for simultaneously receiving / emitting GPON optical signals and 10G PON optical signals.

[0046] However, as optical network requirements continue to increase, 50G PON communication devices are emerging in the industry. One embodiment of the present application provides an optical device 200 to meet the requirements for simultaneously receiving / emitting GPON optical signals, 10G PON optical signals, and 50G PON optical signals. As shown in FIG. 5, the optical device 200 includes a housing 10, an optical connector 1, an optical emitting device 2, and an optical receiving device 3.

[0047] The housing 10 may function as a support structure. The optical connector 1, the light emitting device 2, and the light receiving device 3 may all be mounted in the housing 10. The optical port of the optical connector 1, the light exit port of the light emitting device 2, and the light entrance port of the light receiving device 3 are all located within the housing 10.

[0048] For example, the housing 10 shown in Fig. 6 has a rectangular parallelepiped shape. The housing 10 may be manufactured into another shape that facilitates the attachment of the optical connector 1, the light emitting device 2, and the light receiving device 3. This is not a limitation in the present application.

[0049] An external optical signal can be introduced into the optical connector 1. The optical signal can be a detection optical signal, which is used for assembling and debugging the optical device 200. The optical signal can also be a modulated optical signal carrying transmission data. For example, the optical connector 1 can have a coaxial fiber. The optical signal can be introduced into the optical device 200 via the coaxial fiber. The optical connector 1 can also output an optical signal emitted by the light emitting device 2.

[0050] 5, the light emitting device 2 includes a first laser emitter 21, a second laser emitter 22, and a third laser emitter 23. The first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 are configured to emit light signals of three different communication protocols, respectively.

[0051] The optical receiving device 3 includes a first optical receiver 31, a second optical receiver 32, and a third optical receiver 33. The first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are configured to receive optical signals of three different communication protocols.

[0052] The housing 10 further includes an optical film assembly 4 shown in Fig. 5, which is attached within the housing 10. The optical film assembly 4 includes a plurality of filters 41, which may be distributed at intervals within the housing 10. The plurality of filters 41 includes a first filter group 41a, a second filter group 41b, a third filter group 41c, and a fourth filter group 41d.

[0053] The first filter group 41a is located on the receiving optical path of the first optical receiver 31. The first filter group 41a is configured to introduce, into the first optical receiver 31, an optical signal of a first communication protocol among the optical signals of three different communication protocols introduced from the optical connector 1, and to cause an optical signal of a second communication protocol and an optical signal of a third communication protocol among the optical signals of the three different communication protocols to be output.

[0054] The second filter group 41b is located on the optical path from the first filter group 41a to the second optical receiver 32. The second filter group 41b is configured to allow optical signals of one communication protocol derived from the first filter group 41a to be introduced into the second optical receiver 32, and optical signals of the other communication protocol derived from the first filter group 41a to be output.

[0055] The third filter group 41c is located on the optical path from the second filter group 41b to the third optical receiver 33. The third filter group 41c is configured to introduce the optical signal transmitted from the second filter group 41b into the third optical receiver 33.

[0056] The fourth filter group 41d is located on the output optical paths of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23. The fourth filter group 41d is configured to combine the optical signal of the first communication protocol emitted by the first laser emitter 21, the optical signal of the second communication protocol emitted by the second laser emitter 22, and the optical signal of the third communication protocol emitted by the third laser emitter 23, and introduce the combined optical signal into the optical connector 1.

[0057] Therefore, the optical device 200 in this embodiment of the present application can separate optical signals of three different communication protocols introduced from the optical connector 1 by using the first filter group 41a, the second filter group 41b, and the third filter group 41c, and introduce the optical signals to the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33, respectively. Furthermore, the optical signals of the three different communication protocols emitted by the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 can be combined using the fourth filter group 41d and transmitted to the optical connector 1.

[0058] When the optical signal of the first communication protocol is a 10G PON protocol optical signal, the optical signal of the second communication protocol is a 50G PON protocol optical signal, and the optical signal of the third communication protocol is a GPON protocol optical signal, the first communication protocol includes a modulated optical signal having a receiving rate of 10 Gbps and a wavelength range of 1260 nm to 1280 nm, and a received modulated electrical signal having a rate of 10 Gbps and converted to a modulated optical signal having a wavelength range of 1575 nm to 1580 nm for emission. The second communication protocol includes a modulated optical signal having a receiving rate of 50 Gbps and a wavelength range of 1284 nm to 1288 nm, and a received modulated electrical signal having a rate of 50 Gbps and converted to a modulated optical signal having a wavelength range of 1340 nm to 1344 nm for emission. The third communication protocol includes a modulated optical signal having a receiving rate of 1.25 Gbps and a wavelength range of 1290 nm to 1330 nm, and a receiving modulated electrical signal having a rate of 2.5 Gbps that is converted to a modulated optical signal having a wavelength range of 1480 nm to 1490 nm for emission.

[0059] Therefore, in some embodiments, the first filter group 41a may separate a composite optical signal introduced from the optical connector 1, which includes a modulated optical signal having a rate of 1.25 Gbps and a wavelength range of 1290 nm to 1330 nm, a modulated optical signal having a rate of 10 Gbps and a wavelength range of 1260 nm to 1280 nm, and a modulated optical signal having a rate of 50 Gbps and a wavelength range of 1284 nm to 1288 nm, and introduce the modulated optical signal having a rate of 10 Gbps and a wavelength range of 1260 nm to 1280 nm to the first optical receiver 31, which may extract a modulated optical signal having a rate of 1.25 Gbps and a wavelength range of 1290 nm to 1330 nm, and a modulated optical signal having a rate of 50 Gbps and a wavelength range of 1284 nm to 1288 nm. The second filter group 41b may guide the modulated optical signal having a rate of 50 Gbps and a wavelength range of 1284 nm to 1288 nm output from the first filter group 41a to the second optical receiver 32 and derive a modulated optical signal having a rate of 1.25 Gbps and a wavelength range of 1290 nm to 1330 nm. The third filter group 41c may guide the modulated optical signal having a rate of 1.25 Gbps and a wavelength range of 1290 nm to 1330 nm output from the second filter group 41b to the third optical receiver 33.

[0060] The first laser emitter 21 is configured to convert a received modulated electrical signal having a rate of 10 Gbps into a modulated optical signal having an emission wavelength range of 1575 nm to 1580 nm. The second laser emitter 22 is configured to convert a received modulated electrical signal having a rate of 50 Gbps into a modulated optical signal having an emission wavelength range of 1340 nm to 1344 nm. The third laser emitter 23 is configured to convert a received modulated electrical signal having a rate of 2.5 Gbps into a modulated optical signal having an emission wavelength range of 1480 nm to 1490 nm. The fourth filter group 41d may combine the modulated optical signal having a wavelength range of 1575 nm to 1580 nm emitted by the first laser emitter 21, the modulated optical signal having a wavelength of 1340 nm to 1344 nm emitted by the second laser emitter 22, and the modulated optical signal having a wavelength of 1480 nm to 1490 nm emitted by the third laser emitter 23, and guide the combined modulated optical signal to the optical connector 1. Thus, the first laser emitter 21 and the first optical receiver 31 form a transceiver assembly for 10G PON, the second laser emitter 22 and the second optical receiver 32 form a transceiver assembly for 50G PON, and the third laser emitter 22 and the second optical receiver 32 form a transceiver assembly for GPON. The optical device 200 in this embodiment of the present application includes three transceiver assemblies and can meet the requirements for simultaneously receiving / emitting GPON optical signals, 10G PON optical signals, and 50G PON optical signals.

[0061] It will be understood that the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 correspondingly emitting optical signals of three different communication protocols, and the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 correspondingly receiving optical signals of three different communication protocols, are merely examples. In some other embodiments, the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 may further emit optical signals of another communication protocol, and the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 may further receive optical signals of another communication protocol. This is not limited in the present application. It is only necessary to ensure that the optical device 200 in this embodiment of the present application includes three transceiver assemblies, and the three transceiver assemblies may respectively receive / emit optical signals of three different communication protocols.

[0062] In addition, the optical device 200 has multiple structures and distribution solutions for the light emitting device 2 and the light receiving device 3. For example, as shown in FIG. 5 , the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 in the light emitting device 2 may be independently mounted and distributed at intervals on the housing 10. As another example, any two of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 may be integrally mounted in a single structure, and the remaining one of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 may be independently mounted, thereby improving the integration degree of the light emitting device 2, reducing the volume of the light emitting device 2, and facilitating the miniaturization of the optical device 200. In addition, the independently mounted laser emitter and the other two integrally mounted laser emitters are distributed at intervals on the housing 10 to facilitate the attachment of multiple filters 41 and achieve separation of the optical paths. In another example, the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 are integrated into an integral structure, which further improves the integration degree of the light emitting device 2, reduces the volume of the light emitting device 2, and facilitates the miniaturization of the optical device 200.

[0063] Similarly, the structures of the first optical receiver 31, the second optical receiver 32 and the third optical receiver 33 in the optical receiving device 3 may be similar to the structures of the first laser emitter 21, the second laser emitter 22 and the third laser emitter 23 in the optical emitting device 2 in the above embodiment.

[0064] 5 , the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 in the optical receiving device 3 may be independently mounted and distributed at intervals on the housing 10. As another example, any two of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 may be integrally mounted in a single structure, and the remaining one of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 may be independently mounted, thereby improving the degree of integration of the optical receiving device 3, reducing the volume of the optical receiving device 3, and facilitating the miniaturization of the optical device 200. In addition, the independently mounted optical receivers and the other two integrally mounted optical receivers are spaced apart on the housing 10 to facilitate the attachment of multiple filters 41 and to achieve separation of the optical paths. As another example, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are integrally implemented in a single structure, which further improves the integration degree of the light-emitting device 2, reduces the volume of the light-emitting device 2, and facilitates miniaturization of the optical device 200.

[0065] In addition, regardless of whether the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 in the light emitting device 2 are separately and independently mounted or two or three of them are integrally mounted in a single structure, the separate or integral mounting forms of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 may be a coaxial (transistor outline, TO) mounting form or a box (BOX) mounting form. This is not a limitation in the present application. Similarly, regardless of whether the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 in the light receiving device 3 are separately and independently mounted or two or three of them are integrally mounted together, the separate or integral mounting forms of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 may be a coaxial mounting form or a box mounting form. This is not a limitation in the present application.

[0066] Note that when two or three laser emitters in the light emitting device 2 are integrated into a single structure, some of the filters 410, for example, all or some of the filters 410 in the fourth filter group 41d, may be integrated with the two or three laser emitters in the same housing. Similarly, when two or three optical receivers in the light receiving device 3 are integrated into a single structure, some of the filters 410, for example, all or some of the filters 410 in the first filter group 41a, the second filter group 41b, or the third filter group 41c, may be integrated with the two or three optical receivers in the same housing.

[0067] In addition to the plurality of filters 41, the optical film assembly 4 of the optical device 200 in the present application may further include devices such as an isolator 42 and a collimating lens 43 shown in FIG. 5 , which are not limited in the present application. The isolator 42 is configured to reduce crosstalk of optical signals to the light emitting device 2. The collimating lens 43 is configured to convert convergent light into parallel light or convert parallel light into convergent light.

[0068] The filters 41 need to be positioned at different locations within the housing 10 to implement different mounting structures and distribution methods for the optical emitting device 2 and the optical receiving device 3 within the optical device 200. When assembling the filters 41 and the housing 10, the fastening frames 101 shown in FIG. 7 can be fastened to the inner wall of the housing 10 to integrally position the fastening frames 101 and the housing 10. The fastening frames 101 have grooves whose dimensions and shapes match those of the filters 410. The entire periphery of the filters 410 is connected to the grooves of the fastening frames 101. The positions of the filters 410 within the housing 10 are fixed and cannot be adjusted. Errors are likely to occur during the manufacturing and assembly processes of the fastening frames 101 and the housing 10, which can cause deviations from the preset mounting positions and mounting angles of the filters 410 within the housing 10. As a result, the demultiplexing curves of one or more filters change, resulting in inaccurate optical signal demultiplexing. In particular, for filters 410 with small spatial intervals, filters 410 with installation errors will have poor optical path splitting accuracy, which will seriously affect the accuracy of simultaneous reception / emission of GPON optical signals, 10G PON optical signals, and 50G PON optical signals by optical device 200.

[0069] Therefore, to solve this problem, in some embodiments of the present application, a mounting surface 102 is formed on the housing 10. The mounting surface 102 shown in FIG. 8 is parallel to the XZ plane. The side of the filter 410 may be connected to the mounting surface 102 by an adhesive method. The filter 410 shown in FIG. 9 is a rectangular parallelepiped, and has four side surfaces 4101. One side surface 4101a of the filter 410 is connected to the mounting surface 102 by an adhesive method, as shown in FIG. 10. The shape of the filter 410 may be other shapes. This is not a limitation of the present application.

[0070] When the filter 410 is attached, adhesive application (specifically, it may be a drop of epoxy adhesive) may be first performed at a predetermined attachment position corresponding to the filter 410 on the attachment surface 102 of the housing 10. Then, in the attachment process, the attachment position and attachment angle of the filter 410 are fine-tuned using a side line or a corner of the filter 410 as an attachment reference until the filter 410 reaches the predetermined attachment position and attachment angle (the filter 410 is rotated as shown in FIG. 10 ). Alternatively, whether the filter 410 has reached the predetermined attachment position and attachment angle may be determined by an active attachment method (i.e., detection light is input from the optical connector 1, and a detection device detects whether the detection light that has passed through the filter 410 matches the target light emission angle). Then, the adhesive layer is hardened, and the filter 410 is fastened to the housing 10. Therefore, multiple filters 41 can be accurately attached to the housing 10. This reduces assembly errors and ensures the demultiplexing accuracy of the multiple filters 41.

[0071] It should be noted that based on the mounting position of the filter 410, there may be one, two or more mounting surfaces 102 within the housing 10, so that the spaced apart filters 41 are fastened to the housing 10 in a side mounting manner to ensure high mounting accuracy of the filters 41.

[0072] In addition, in some embodiments, as shown in FIG. 11 , optical device 200 further includes a Z-block filter assembly 40. As shown in FIG. 12 , Z-block filter assembly 40 includes one or more filters of multiple filters 41 and an adjustment support kit 401. For example, Z-block filter assembly 40 includes two filters 410 of multiple filters 41, and both filters 410 are disposed on adjustment support kit 401. The two filters 410 may be fastened to adjustment support kit 401 in a joint manner. Adjustment support kit 401 may also be fastened to housing 10 in a joint manner. For example, adjustment support kit 401 may be an adjustment support or an adjustment prism. This is not a limitation of the present application.

[0073] In addition, due to the limited volume of the adjustment support kit 401 and the close spatial interval between the two filters 410, it is also applicable to scenarios where two or more laser emitters in the laser emitting device 2 are integrated together, or two or more optical receivers in the optical receiving device 3 are integrated together. The first optical receiver 31 and the second optical receiver 32 in the optical receiving device 3 shown in Fig. 11 are integrated into a single structure.

[0074] Additionally, in an example in which the adjustment support kit 401 is an adjustment prism, the bonding and assembly process between the adjustment prism and the housing 10 is the same as the bonding and assembly process in the above embodiment in which the side of the filter 410 is attached to the mounting surface 102 of the housing 10. That is, the adjustment prism is attached to the housing 10 in advance using an adhesive material (e.g., epoxy adhesive). Then, the adjustment prism is slightly adjusted using a side line or corner of the adjustment prism as an attachment reference to change the attachment position and attachment angle of the filter 410 until the filter 410 reaches the preset attachment position and attachment angle. Alternatively, whether the filter 410 has reached the preset attachment position and attachment angle may be determined using an active attachment method (i.e., detection light is input from the optical connector 1, and a detection device detects whether the detection light that has passed through the filter 410 matches the target light emission angle). Then, the adhesive layer is cured, and the filter 410 is fastened to the housing 10. Therefore, the filter 410 in the Z-block filter assembly 40 can also be mounted accurately, reducing assembly errors and ensuring the branching accuracy of the filter 410 .

[0075] It should be noted that in addition to one or more filters and the adjusting support kit 401, the Z-block filter assembly 40 may further include another optical film, such as a reflective film or plate, based on the requirements of the optical path. The reflective film may be directly attached to the adjusting prism, and the reflector may be directly attached to the adjusting support. The adjusting support kit 401 shown in FIG. 12 is an adjusting prism, and a reflective film 402 is attached to the adjusting prism 401. Additionally, in this embodiment of the present application, the number of Z-block filter assemblies 40 in the optical device 200 is not limited, and there may be one, two, or more Z-block filter assemblies 40.

[0076] In addition to the above two methods, it may be ensured that the filter 410 can be accurately attached to the housing 10. In some embodiments of the present application, the optical device 200 further includes an adjustment frame 5 as shown in FIG. 13 . The filter 410 may be attached to the adjustment frame 5. For example, the filter 410 may be fastened to the adjustment frame 5 in a jointed manner. The adjustment frame 5 is connected to the inner wall of the housing 10. When the filter 410, the adjustment frame 5, and the housing 10 are assembled, the filter 410 may be fastened to the adjustment frame 5 first. Then, the adjustment frame 5 is movably (for example, rotatably) connected to the housing 10. For example, as shown in FIG. 13 , the adjustment frame 5 includes a mounting bracket 51 and an adjustment base 52, and the filter 410 is attached to the mounting bracket 51. The adjustment base 52 may be cylindrical, and a fitting hole may be provided in the housing 10, and the adjustment base 52 may be rotatably attached to the mounting hole. A mounting bracket 51 is fastened to one end surface of the adjustment base 52, and an adjustment slot 521 (see FIG. 14 ) is formed on the other end surface of the adjustment base 52. The adjustment tool may be a wrench that fits into the adjustment slot 521. By inserting the wrench into the adjustment slot 521 and applying a rotational force, the adjustment base 52 rotates within the fitting hole, adjusting the installation angle of the filter 410. As shown in FIG. 15 , a detection device may be used to detect whether detection light is input to the optical connector 1 and passes through the filter 410, reaching a preset light output angle θ. In this way, it is determined whether the filter 410 reaches the preset installation angle, ensuring the installation accuracy of the filter 410 and the demultiplexing accuracy. Finally, the filter 410 is fastened to the adjustment frame 5 by a bonding method.

[0077] However, the adjustment frame 5 needs to be manually adjusted during the assembly process, which is cumbersome. Therefore, in some embodiments of the present application, the optical device 200 further includes a driving piece 6 shown in FIG. 16 , which is connected to the adjustment frame 5 in a driving manner. During assembly of the optical device 200, the driving piece 6 may drive and rotate the adjustment frame 5, thereby realizing the function of automatically adjusting the mounting angle of the filter 410. Specifically, the driving piece 6 may be a driving motor.

[0078] It can be understood that the optical device 200 may include a plurality of adjustment frames 5, and the plurality of filters 41 are respectively attached to the plurality of adjustment frames 5. For example, the number of adjustment frames 5 and the number of filters 410 in the optical device 200 are the same. The plurality of filters 41 are attached to the plurality of adjustment frames 5 in a one-to-one correspondence.

[0079] In some optical devices 200 where the space within the housing 10 is small, it is not possible to mount the same number of adjustment frames 5 as the number of filters 41 within the housing 10. Therefore, in some embodiments, the number of adjustment frames 5 within the optical device 200 is smaller than the number of filters 410. In other words, only some of the filters 410 among the multiple filters 41 may be correspondingly mounted on the adjustment frames 5. For example, some of the filters 410 among the multiple filters 41 may have the function of reflecting optical signals to other filters 410, and a filter 410 that receives the reflected optical signals may be selected and mounted on the adjustment frame 5. Therefore, even if a filter 410 that reflects an optical signal has an installation error, a filter 410 that receives an optical signal having an optical output angle error does not further increase the error, thereby reducing the impact of the installation error on the demultiplexing accuracy.

[0080] The structures and distribution manners of the light-emitting device 2, the light-receiving device 3, and the optical film assembly 4 in the optical device 200 will be described below with reference to several specific examples.

[0081] Example 1 17 and 18, this exemplary optical device 200 includes a housing 10, which is provided with an optical connector 1, an optical emitting device 2, and an optical receiving device 3. The optical emitting device 2 includes a first laser emitter 21, a second laser emitter 22, and a third laser emitter 23 that are independently mounted. The optical receiving device 3 includes a first optical receiver 31, a second optical receiver 32, and a third optical receiver 33 that are independently mounted. The first laser emitter 21, the second laser emitter 22, the third laser emitter 23, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 shown in FIG. 17 are all coaxially mounted. The first laser emitter 21, the second laser emitter 22, the third laser emitter 23, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are arranged at intervals on the housing 10. Additionally, compared to the optical emitting device 2, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 of the optical receiving device 3 are located closer to the optical connector 1 of the housing 10. The first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 are configured to emit optical signals of a first communication protocol, an optical signal of a second communication protocol, and an optical signal of a third communication protocol, respectively. The first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are configured to receive optical signals of the first communication protocol, an optical signal of the second communication protocol, and an optical signal of the third communication protocol, respectively.

[0082] For example, one of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 is disposed facing the optical connector 1. For example, the second laser emitter 22 shown in FIG. 17 is disposed facing the optical connector 1. The first laser emitter 21, the third laser emitter 23, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are located between the first laser emitter 21 and the optical connector 1. In addition, the third laser emitter 23, the first laser emitter 21, the third optical receiver 33, the second optical receiver 32, and the first optical receiver 31 are disposed in descending order in the distance direction from the optical connector 1.

[0083] An optical film assembly 4 is mounted within the housing 10, and the optical film assembly 4 includes a plurality of filters 41, which include a first filter group 41a, a second filter group 41b, a third filter group 41c, and a fourth filter group 41d.

[0084] The first filter group 41a includes a first filter 411 and a second filter 412. The first filter 411 and the second filter 412 are both located on an optical path along which the first optical receiver 31 receives optical signals of a first communication protocol, and are arranged sequentially in the direction of light incidence of the first optical receiver 31. The first filter 411 is arranged opposite the optical connector 1. The first filter 411 may separate optical signals of the first communication protocol from optical signals of the second communication protocol and optical signals of the third communication protocol in a first combined optical signal (including optical signals of the first communication protocol, optical signals of the second communication protocol, and optical signals of the third communication protocol) sent through the optical connector 1. The first filter 411 can reflect the optical signals of the first communication protocol in the first combined optical signal sent through the optical connector 1 to the second filter 412, allowing the optical signals of the second communication protocol and the optical signals of the third communication protocol in the first combined optical signal to be transmitted. The second filter 412 may reflect the optical signal of the second communication protocol reflected by the first filter 411 to the first optical receiver 31 .

[0085] The second filter group 41b includes a third filter 413 and a fourth filter 414. The third filter 413 and the fourth filter 414 are both located on an optical path along which the second optical receiver 32 receives optical signals of the second communication protocol, and are sequentially arranged along the light incident direction of the second optical receiver 32. The third filter 413 is located on the transmission optical path of the first filter 411. The third filter 413 is configured to separate optical signals of the second communication protocol from optical signals of the third communication protocol in a second combined optical signal (including optical signals of the second communication protocol and optical signals of the third communication protocol) transmitted by the first filter 411. The third filter 413 transmits the optical signals of the third communication protocol in the second combined signal, and reflects the optical signals of the second communication protocol to the fourth filter 414. The fourth filter 414 may reflect the optical signal of the second communication protocol reflected by the third filter 413 to the second optical receiver 32 .

[0086] The third filter group 41b includes a fifth filter 415 and a sixth filter 416. The fifth filter 415 and the sixth filter 416 are both located on an optical path along which the third optical receiver 33 receives an optical signal of the third communication protocol, and are sequentially arranged along the light incident direction of the third optical receiver 33. The fifth filter 415 is located on the transmission optical path of the third filter 413. The fifth filter 415 is configured to reflect the optical signal of the third communication protocol transmitted by the third filter 413 to the sixth filter 416. The sixth filter 416 may reflect the optical signal of the third communication protocol reflected by the fifth filter 415 to the third optical receiver 33.

[0087] The multiple filters 41 are arranged such that only the first filter 411 is located where the light incident paths of the three optical receivers overlap, and the third filter 413 is located where the light incident paths of two optical receivers overlap. Therefore, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 have little effect on each other. For example, the second filter 412 does not affect the installation of the third filter 413 and the fourth filter 414. This distribution of the multiple filters 41 is applicable to optical devices 200 in which the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are independently implemented and have a large spatial interval.

[0088] It will be understood that if the distribution positions of the first laser emitter 21, the second laser emitter 22, the third laser emitter 23, the first optical receiver 31, the third optical receiver 33, and the second optical receiver 32 on the housing 10 are interchanged, the correspondence between the multiple filters 41 and the optical paths of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 will also change accordingly. Details will not be repeated here.

[0089] 19 and 20 , based on the arrangement of the filter 410, in some embodiments, the first filter group 41 a further includes a seventh filter 417, which is located on the reflected optical path of the second filter 412 and opposite the first optical receiver 31 to prevent impurity optical signals from entering the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33. The seventh filter 417 may remove impurity optical signals in the optical signal of the first communication protocol reflected by the second filter 412, allowing the filtered optical signal of the first communication protocol to be transmitted to the first optical receiver 31.

[0090] Similarly, the second filter group 41b further includes an eighth filter 418, which is disposed on the reflected optical path of the fourth filter 414 and is positioned opposite the second optical receiver 32. The eighth filter 418 can remove impurity optical signals in the optical signal of the second communication protocol reflected by the fourth filter 414, and enable the filtered optical signal of the second communication protocol to be transmitted to the second optical receiver 32.

[0091] Similarly, the third filter group 41c further includes a ninth filter 419, which is located on the reflected optical path of the sixth filter 416 and is arranged opposite the third optical receiver 33. The ninth filter 419 can remove impurity optical signals from the optical signals of the third communication protocol reflected by the sixth filter 416, allowing the filtered optical signals of the third communication protocol to be transmitted to the third optical receiver 33. Therefore, the impurity optical signals can be prevented from entering the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33.

[0092] The optical path from the second laser emitter 22 to the optical connector 10 intersects with the optical path from the third laser emitter 23 to the optical connector 10. The fourth filter group 41b includes a tenth filter 420 and an eleventh filter 421, and the tenth filter 420 is located on the optical path from the second laser emitter 22 to the optical connector 10 and on the optical path from the third laser emitter 23 to the optical connector 10. The optical path from the first laser emitter 21 to the optical connector 10 intersects with the output optical path of the tenth filter 420. The eleventh filter 421 is located at the intersection of the optical path from the first laser emitter 21 to the optical connector 10 and the output optical path of the tenth filter 420. The tenth filter 420 combines the optical signal of the second communication protocol emitted from the second laser emitter 22 and the optical signal of the third communication protocol emitted from the third laser emitter 23 into a third combined optical signal, allowing the third combined optical signal to be transmitted to the eleventh filter 421. The eleventh filter 421 combines the third combined optical signal with the optical signal of the first communication protocol emitted by the first laser emitter 2 into a fourth combined optical signal, and transmits the fourth combined optical signal to the optical connector 1.

[0093] 20 are all located on the optical emission paths of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23. In addition, the fifth filter 415, the third filter 413, and the first filter 411 are sequentially located on the optical emission path of the optical emitting device 2. The fifth filter 415, the third filter 413, and the first filter 411 are further configured to enable the optical signal of the first communication protocol emitted by the first laser emitter 21, the optical signal of the second communication protocol emitted by the second laser emitter 22, and the optical signal of the third communication protocol emitted by the third laser emitter 23 to be combined and transmitted to the optical connector 1. Therefore, the fourth combined optical signal derived from the eleventh filter 421 may be transmitted to the optical connector 1 via the fifth filter 415, the third filter 413, and the first filter 411 in sequence.

[0094] In the case of an optical device 200 having a large space inside the housing 10, the optical device 200 may include eleven adjustment frames 5, and the eleven filters 410 may be arranged on the eleven adjustment frames 5 in one-to-one correspondence. The eleven adjustment frames 5 are connected to the inner wall of the housing 10. When assembling the adjustment frames 5 and the housing 10, the attachment positions and attachment angles of the filters 410 are adjusted by adjusting the attachment positions and attachment angles of the adjustment frames 5. Therefore, the eleven filters 41 can be attached accurately, assembly errors are reduced, and demultiplexing accuracy is ensured.

[0095] Additionally, in some embodiments, the optical device 200 of this example further includes a plurality of drive pieces 6, and the plurality of adjustment frames 5 may be further connected to one or more drive pieces 6 in a driving manner. Specifically, the drive pieces 6 are drive motors. This allows the mounting angle of the filter 410 to be automatically adjusted.

[0096] However, the space within the housing 10 of the optical device 200 shown in FIG. 20 is small. Therefore, only a small number of adjusting frames 5 may be disposed within the housing 10. As shown in FIG. 21 , the optical device 200 may include three adjusting frames 5, which are a first adjusting frame 501, a second adjusting frame 502, and a third adjusting frame 503. The second filter 412 is attached to the first adjusting frame 501, the fourth filter 414 is attached to the second adjusting frame 502, and the sixth filter 416 is attached to the third adjusting frame 503. Therefore, even if the first filter 411, the third filter 413, and the fifth filter 415 have an installation error, the second filter 412, the fourth filter 414, and the sixth filter 416 are installed with high precision, so the second filter 412 does not increase the installation error of the first filter 411 upon reflection, the fourth filter 414 does not increase the installation error of the third filter 413 upon reflection, and the sixth filter 416 does not increase the installation error of the fifth filter 415 upon reflection. Therefore, the installation error of the multiple filters 41 is reduced to a value less than ±0.3°, and the demultiplexing precision of the multiple filters 41 in the optical device 200 can be ensured.

[0097] Additionally, in some embodiments, the first adjusting frame 501, the second adjusting frame 502, and the third adjusting frame 503 may all be drivingly connected to the driving pieces 6. The first adjusting frame 501, the second adjusting frame 502, and the third adjusting frame 503 may be drivingly connected to the same driving piece 6. Alternatively, the first adjusting frame 501, the second adjusting frame 502, and the third adjusting frame 503 may be drivingly connected to three driving pieces 6 in a one-to-one relationship, respectively. This is not a limitation in the present application.

[0098] Based on the above description, the optical device 200 having the above structure may be assembled by the following assembly method.

[0099] S101: A plurality of filters 41 are movably attached to preset reference positions in the housing 10.

[0100] For example, when the number of filters 410 and the number of adjustment frames 5 in the optical device 200 are equal, for example, the optical device 200 includes 11 filters and 11 adjustment frames 5, S101 is specifically: a step of respectively placing a plurality of filters 41 on a plurality of adjustment frames 5; and a step of respectively movably connecting an assembly of the housing 10 and the plurality of filters 41 to the adjustment frames 5; Includes.

[0101] When the number of filters 410 in the optical device 200 is greater than the number of adjustment frames 5, S101 specifically includes the following steps: a step of fixedly mounting at least one filter 410 of the plurality of filters 41 on an adjustment frame 5; and a step of movably mounting the assembly of the filter 410 and the adjustment frame 5 and the remaining filters 410 of the plurality of filters 41 within a housing 10; Includes.

[0102] In addition, the fact that the adjustment frame 5 and the housing 10 are movably connected may specifically mean that the adjustment frame 5 and the housing 10 are mechanically connected so that they can rotate, or may mean that they are directly connected using an adhesive material that requires a special curing process.

[0103] S102: The detection light is input into the optical connector 1, and the mounting angle of the filter 410 is sequentially adjusted using the adjustment frame 5 in the optical path arrangement until the beam of detection light derived or introduced from the filter 410 reaches a preset angle, and the adjustment frame 5 is fastened to the housing 10.

[0104] As an example, use is made of the optical device 200 shown in Fig. 21. The attachment angle of the second filter 412 may be adjusted using the first adjustment frame 501, the attachment angle of the fifth filter 415 may be adjusted using the second adjustment frame 502, and the attachment angle of the eighth filter 418 may be adjusted using the third adjustment frame 503. The first adjustment frame 501, the second adjustment frame 502, and the third adjustment frame 503 may be adjusted manually or automatically.

[0105] When the adjustable frame 5 is mechanically and rotatably connected to the housing 10, the manner in which the adjustable frame 5 is fastened to the housing 10 may be, specifically, by directly fastening the adjustable frame 5 to the housing 10 by welding or adhesive.

[0106] When the adjusting frame 5 is connected to the housing 10 using an adhesive material that requires a dedicated curing process, the manner in which the adjusting frame 5 is fastened to the housing 10 may specifically be by curing the adhesive material between the adjusting frame 5 and the housing 10. For example, a pre-curing process is performed on the adhesive material between the adjusting frame 5 and the housing 10. Specifically, the adhesive material between the adjusting frame 5 and the housing 10 may be cured using UV light. Thereafter, a further curing process is performed on the adhesive material between the adjusting frame 5 and the housing 10. Specifically, a light curing or heat curing process may be used.

[0107] Additionally, in this example, a mounting surface 102 shown in FIG. 22 may be formed on the inner wall of the housing 10. All of the multiple filters 41 may be bonded to the mounting surface 102, or only one or more filters 410 may be bonded to the mounting surface 102. Therefore, the mounting error of the multiple filters 41 can be reduced to a value less than ±0.3°, ensuring the demultiplexing accuracy of the filters 410 in the optical device 200. One mounting surface 102 is formed on the housing 10 shown in FIG. 22, and the mounting surface 102 is parallel to the XZ plane. All of the multiple filters 41 are attached to the mounting surface 102.

[0108] Correspondingly, the plurality of filters 41 in the optical device 200 may be assembled by the following assembly method.

[0109] S201: Based on a preset reference direction of the filter 410 in the housing 10, adhesive is applied to the mounting surface 102 in the housing 10.

[0110] For example, the mounting positions and mounting angles of the multiple filters 41 on the mounting surface 102 of the housing 10 are designed to fulfill the demultiplexing function of the multiple filters 41 based on the distribution positions of the optical emitting devices 2 and the optical receiving devices 3 in the housing 10. The mounting positions are preset mounting positions, and the mounting angles are preset mounting angles. The adhesive application is performed at the preset mounting positions of the multiple filters 41 on the mounting surface 102 of the housing 10.

[0111] S202: The side surface 4101 of the filter 410 is attached to the adhesive layer on the mounting surface 102, and the mounting angle of the filter 410 is adjusted using the side line or corner of the filter 410 as the mounting reference until the mounting angle reaches a preset mounting angle.

[0112] For example, one side surface 4101 of any filter 410 is attached to the adhesive layer of the mounting surface 102. The mounting angle of the filter 410 is adjusted using the side line or corner of the filter 410 as a mounting reference until the mounting angle of the filter 410 reaches a preset mounting angle. Then, the above steps are sequentially repeated based on the optical path arrangement to adjust the mounting angles of multiple filters 41.

[0113] S203: The adhesive layer between the side surface 4101 of the filter 410 and the mounting surface 102 is cured.

[0114] For example, a pre-curing operation may first be performed on the adhesive layer between the side surface 4101 of the filter 410 and the mounting surface 102. Specifically, UV light may be used to cure the adhesive layer. Then, a further curing operation may be performed on the adhesive layer between the side surface 4101 of the filter 410 and the mounting surface 102. Specifically, a light curing or heat curing process may be used.

[0115] Note that in this example, the optical film assembly 4 further includes an isolator 42 and a collimating lens 43, as shown in FIG. 21. There may be only one isolator 42, which is disposed on the output optical paths of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 in the light emitting device 2. Therefore, the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 can be simultaneously protected from optical signal crosstalk. Alternatively, there may be three isolators 42. As shown in FIG. 22, the three isolators 42 are a first isolator 42a, a second isolator 42b, and a third isolator 42c. The first isolator 42a is disposed opposite the optical output port of the first laser emitter 21, the second isolator 42b is disposed opposite the optical output port of the second laser emitter 22, and the third isolator 42c is disposed opposite the optical output port of the third laser emitter 23. Therefore, the first isolator 42a can protect the first laser emitter 21 from optical signal crosstalk. The second isolator 42b can protect the second laser emitter 22 from optical signal crosstalk. The third isolator 42c can protect the third laser emitter 23 from optical signal crosstalk.

[0116] There may be two collimating lenses 43, which are a first collimating lens 431 and a second collimating lens 432. The first collimating lens 431 is disposed at an optical port of the optical connector 1 close to the internal cavity of the housing 10. The first collimating lens 431 is configured to convert convergent light introduced from the optical connector 1 into parallel light. The second collimating lens 432 is disposed between the eleventh filter 421 and the fifth filter 415. The second collimating lens 432 is configured to convert the fourth combined optical signal combined by the eleventh filter 421 from convergent light to parallel light. The first collimating lens 431 is further configured to convert the parallel light output through the first filter 411 into convergent light and introduce the convergent light into the optical connector 1.

[0117] Example 2 The structure of the optical device 200 in this embodiment is similar to that of the first embodiment, except that any two of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 in the light-emitting device 2 of the optical device 200 in this embodiment are integrally mounted in an integrated structure, and the rest are independently mounted. Therefore, the integration degree of the light-emitting device 2 is high, the volume of the light-emitting device 2 is small, and the optical device 200 can be easily miniaturized.

[0118] The second laser emitter 22 and the third laser emitter 23 shown in Fig. 23 are mounted in an integrated structure. In addition, the second laser emitter 22 and the third laser emitter 23 may be mounted in an integrated structure by box mounting or coaxial mounting. The first laser emitter 21 may be mounted in a box mounting or coaxial mounting. The second laser emitter 22 and the third laser emitter 23 shown in Fig. 23 are integrated into an integrated structure by coaxial mounting, and the first laser emitter 21 is also mounted coaxially.

[0119] 23 , the second laser emitter 22 and the third laser emitter 23 mounted in an integral structure may be disposed facing the optical connector 1. The first laser emitter 21 is disposed at a distance from the second laser emitter 22 and the third laser emitter 23 which are integrally formed, and the first laser emitter 21 is located on the side of the second laser emitter 22 and the third laser emitter 23 which are integrally formed, closer to the optical connector 1.

[0120] In addition, the optical device 200 in this example further includes an adjustment support kit 401 and a reflective film 402, and the adjustment support kit 401 may specifically be an adjustment prism. The reflective film 402 and a tenth filter 420 are attached to the adjustment prism to form the Z-block filter assembly 40. The reflective film 402 is located on the radiation optical path of the third laser emitter chip in the integrated second laser emitter 22 and third laser emitter 23. The reflected optical path of the reflective film 402 intersects with the radiation optical path of the second laser emitter chip in the integrated second laser emitter 22 and third laser emitter 23. The tenth filter 420 is located at the intersection of the reflected optical path of the reflective film 402 in the integrated second laser emitter 22 and third laser emitter 23 and the radiation optical path of the second laser emitter chip. The optical signals of the third communication protocol emitted by the third laser emitter chips in the integrated second laser emitter 22 and third laser emitter 23 are reflected from the reflective film 402 to the tenth filter 420 using the adjusting prism. The optical signals of the second communication protocol emitted by the second laser emitter chips in the integrated second laser emitter 22 and third laser emitter 23 enter the tenth filter 420. The tenth filter 420 combines the optical signals of the second communication protocol and the optical signals of the third communication protocol into a third combined optical signal and transmits the third combined optical signal to the eleventh filter 421.

[0121] Additionally, in some embodiments, as shown in FIG. 23, the Z-block filter assembly 40, the second laser emitter 22, and the third laser emitter 23 are integrated into the same housing.

[0122] It will be understood that the adjustment prism may be replaced by an adjustment support, and the reflective film 402 may be replaced by a reflector, which is not a limitation of the present application.

[0123] Example 3 24, the optical device 200 of this example has the same structure as that of Example 1, except that the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 of the light-emitting device 2 in the optical device 200 of this example are integrally mounted together. Therefore, the integration degree of the light-emitting device 2 is high, the volume of the light-emitting device 2 is small, and the optical device 200 can be easily miniaturized.

[0124] In addition, the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23, which are integrally mounted in a single structure, may be mounted by a box mounting or a coaxial mounting. The first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 shown in FIG. 24 are mounted in a single structure by a box mounting.

[0125] 24 , the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23, which are integrally mounted, may be positioned opposite the optical connector 1. Additionally, the optical device 200 of this example further includes an adjustment support kit 401, a first reflective film 4021, and a second reflective film 4022, and the adjustment support kit 401 is specifically an adjustment prism. The first reflective film 4021, the second reflective film 4022, the tenth filter 420, and the eleventh filter 421 are all attached to the adjustment prism to form the Z-block filter assembly 40. The first reflective film 4021 is located on the radiation light path of the third laser emitter chip in the integrally mounted first laser emitter 21, the second laser emitter 22, and the third laser emitter 23. The reflected light path of the first reflective film 4021 intersects with the radiation light path of the second laser emitter chips in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23. The tenth filter 420 is located at the intersection of the reflected light path of the first reflective film 4021 and the radiation light path of the second laser emitter chips in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23. The second reflective film 4022 is located on the reflected light path of the tenth filter 420. The radiation light path of the first laser emitter chips in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 intersects with the reflected light path of the second reflective film 4022. The eleventh filter 421 is located at the intersection of the radiation light path of the first laser emitter chip in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 and the reflection light path of the second reflection film 4022.

[0126] The optical signals of the third communication protocol emitted by the third laser emitter chips in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 are reflected from the first reflective film 4021 to the tenth filter 420 using the tuning prism. The optical signals of the second communication protocol emitted by the second laser emitter chips in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 enter the tenth filter 420. The tenth filter 420 combines the optical signals of the second communication protocol and the optical signals of the third communication protocol into a third combined optical signal and transmits the third combined optical signal to the second reflective film 4022 using the tuning prism. The second reflective film 4022 reflects the third combined optical signal to the eleventh filter 421. The optical signal of the first communication protocol emitted by the first laser emitter chip in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 enters the eleventh filter 421. The eleventh filter 421 combines the optical signal of the first communication protocol and the third combined optical signal into a fourth combined optical signal, and transmits the fourth combined optical signal to the optical connector 1.

[0127] Additionally, in some embodiments, as shown in FIG. 24, the Z-block filter assembly 40, the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 are integrated into the same housing.

[0128] It will be understood that the adjustment prism may be replaced by an adjustment support, and the first reflective film 4021 and the second reflective film 4022 may be replaced by a reflector, which is not limited in this application.

[0129] Example 4 The optical device 200 of this example has the same partial structure as that of Example 1, except that, as shown in FIGS. 25 and 26 , the first filter group 41a in the optical device 200 of this example includes a first filter 411, a second filter 412, and a third filter 413. The first filter 411, the second filter 412, and the third filter 413 are all located on the receiving optical paths of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33. In addition, the first filter 411, the second filter 412, and the third filter 413 are sequentially distributed in the light incident direction of the first optical receiver 31. The first filter 411 reflects a first combined optical signal, which is sent through the optical connector 1 and includes an optical signal of a first communication protocol, an optical signal of a second communication protocol, and an optical signal of a third communication protocol, to the second filter 412. The second filter 412 reflects the first combined optical signal to the third filter 413. The third filter 413 separates the optical signals of the first communication protocol from the optical signals of the second communication protocol and the optical signals of the third communication protocol. The third filter 413 may reflect the optical signals of the second communication protocol and the optical signals of the third communication protocol and allow the optical signals of the first communication protocol to be transmitted to the first optical receiver 31.

[0130] The second filter group 41b includes a fourth filter 414, and the fourth filter 414 is located on the optical path from the third filter 413 to the second optical receiver 32. The fourth filter 414 can reflect the optical signal of the third communication protocol reflected by the third filter 413, so that the optical signal of the second communication protocol is transmitted to the second optical receiver 32. Thus, the fourth filter 414 can separate the optical signal of the second communication protocol reflected by the third filter 413 from the optical signal of the third communication protocol.

[0131] The third filter group 41c includes a fifth filter 415, and the fifth filter 415 is located on the optical path from the fourth filter 414 to the third optical receiver 33. The fifth filter 415 can reflect the optical signal of the third communication protocol reflected by the fourth filter 414 to the third receiver 33.

[0132] Compared with Example 1, in this example, the optical receiving device 3 requires a small amount of filter 410, which is applicable to application scenarios where the spatial intervals between the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 on the housing 10 are small.

[0133] It can be seen that when the distribution positions of the first optical receiver 31, the third optical receiver 33, and the second optical receiver 32 on the housing 10 are interchanged, the correspondence between the first filter group 41a, the second filter group 41b, and the third filter group 41c and the optical paths of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 also changes accordingly. Details will not be repeated here.

[0134] 27 and 28, based on the arrangement of the multiple filters 41, in some embodiments of this example, the first filter group 41a further includes a sixth filter 416, which is located on the transmission optical path of the third filter 413 and opposite the first optical receiver 31 to prevent impurity optical signals from entering the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33. The sixth filter 416 may remove impurity optical signals from the optical signal of the first communication protocol transmitted by the third filter 413, and transmit the filtered optical signal to the first optical receiver 31.

[0135] The second filter group 41 a further includes a seventh filter 417, which is located on the transmission optical path of the fourth filter 414 and is disposed opposite the second optical receiver 32. The seventh filter 417 may remove impurity optical signals from the optical signals of the second communication protocol transmitted by the fourth filter 414, and transmit the filtered optical signals to the second optical receiver 32.

[0136] The third filter group 41c further includes an eighth filter 418, which is located on the reflected optical path of the fifth filter 415 and is disposed opposite the third optical receiver 33. The eighth filter 418 may remove impurity optical signals from the optical signal of the third communication protocol reflected by the fifth filter 415, and transmit the filtered optical signal to the third optical receiver 33.

[0137] In addition, the first filter 411 is located on the optical emission paths of the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23. The first filter 411 may further enable the optical signal of the first communication protocol emitted by the first laser emitter 21, the optical signal of the second communication protocol emitted by the second laser emitter 22, and the optical signal of the third communication protocol emitted by the third laser emitter 23 to be transmitted to the optical connector 1. Thus, the fourth combined optical signal derived from the eleventh filter 421 may be transmitted to the optical connector 1 sequentially via the first filter 411.

[0138] Based on the above description, the aforementioned eight filters may also be connected to the housing 10 in a side-mounted manner. This mounting solution is similar to that in Example 1, and may be assembled and debugged sequentially in the order of the first filter 411, the second filter 412, the third filter 413, the sixth filter 416, the fourth filter 414, the seventh filter 417, the fifth filter 415, and the eighth filter 418. Details will not be repeated here.

[0139] The internal space of the optical device 200 shown in FIG. 28 is narrow, and it is not possible to arrange eight adjustment frames 5 within the housing 10 to respectively mount eight filters 41. Therefore, three adjustment frames 5 may be arranged within the housing 10. As shown in FIG. 29, the three adjustment frames 5 are a first adjustment frame 501, a second adjustment frame 502, and a third adjustment frame 503. The second filter 412 is mounted on the first adjustment frame 501, the third filter 413 is mounted on the second adjustment frame 502, and the fifth filter 415 is mounted on the third adjustment frame 503. Therefore, even if the first filter 411 has an installation error, the second filter 412, the third filter 413, and the fifth filter 415 are installed with high precision, so that neither the second filter 412 nor the third filter 413 increases the installation error of the first filter 411 during reflection, and the fifth filter 415 does not increase the installation error of the fourth filter 414 during reflection. Therefore, the installation error of the multiple filters 41 can be reduced to a value less than ±0.3°, ensuring the demultiplexing accuracy of the filter 410 in the optical device 200. Alternatively, the fourth filter 414 may be installed on the third adjustment frame 503 to achieve the above-described technical effect.

[0140] In addition, the method of assembling and debugging the three adjustment frames 5 and the housing 10 is the same as in Example 1, and assembly and debugging may be performed sequentially in the order of the first adjustment frame 501, the second adjustment frame 502, and the third adjustment frame 503. Details will not be repeated here.

[0141] Example 5 The structure of the optical device 200 of this example is similar to the partial structure of Example 4, except that any two of the first optical receiver 31, second optical receiver 32, and third optical receiver 33 of the optical receiving device 3 in the optical device 200 of this example are integrally mounted in an integrated structure, and the rest are mounted independently. Therefore, the degree of integration of the optical receiving device 3 is high, the volume of the optical receiving device 3 is small, and the optical device 200 can be easily miniaturized.

[0142] 30, the second optical receiver 32 and the third optical receiver 33 in the optical receiving device 3 are integrally mounted in an integrated structure, while the first optical receiver 31 is independently mounted. In addition, the second optical receiver 32 and the third optical receiver 33 are integrally mounted in a box or coaxial manner. The first optical receiver 31 is also mounted in a box or coaxial manner.

[0143] The seventh filter 417 in the second filter group 41b is disposed opposite the second optical chip in the integrated second optical receiver 32 and third optical receiver 33. The second filter group 41b may guide the optical signals of the second communication protocol to the second optical chip in the integrated second optical receiver 32 and third optical receiver 33 and reflect the optical signals of the second communication protocol to the third filter group 41c. Thus, the second filter group 41b may separate the optical signals of the second communication protocol from the optical signals of the third communication protocol.

[0144] The eighth filter 418 in the third filter group 41c is disposed opposite the third optical chip in the integrated second optical receiver 32 and third optical receiver 33. The third filter group 41c may guide optical signals of the third communication protocol to the third optical chip in the integrated second optical receiver 32 and third optical receiver 33.

[0145] Example 6 The optical device 200 of this example has the same partial structure as that of Example 4, except that, as shown in Fig. 31, the first optical receiver 31 and the second optical receiver 32 of the optical receiving device 3 in the optical device 200 of this example are integrally mounted in an integrated structure, and the third optical receiver 33 is mounted independently. In addition, the first optical receiver 31 and the second optical receiver 32 are mounted in an integrated structure by box mounting or coaxial mounting. The third optical receiver 33 is mounted by box mounting or coaxial mounting.

[0146] In this example, the first filter group 41a includes a first filter 411, a second filter 412, a third filter 413, and a sixth filter 416. The second filter group 41b includes a fourth filter 414 and a seventh filter 417. The optical device 200 further includes an adjustment support kit 401 and a reflective film 402. The adjustment support kit 401 is specifically an adjustment prism. The third filter 413, the fourth filter 414, and the reflective film 402 are all disposed on the adjustment support kit 401 to form the Z-block filter assembly 40.

[0147] The first filter 411, second filter 412, third filter 413, and sixth filter 416 in the first filter group 41a are all located on the receiving optical path of the first optical receiver 31 and are arranged sequentially along the light incident direction of the first optical receiver 31. The first filter 411 reflects a first combined optical signal, which is sent through the optical connector 1 and includes optical signals of a first communication protocol, an optical signal of a second communication protocol, and an optical signal of a third communication protocol, to the second filter 412. The second filter 412 reflects the first combined optical signal to the third filter 413 using an adjusting prism. The third filter 413 reflects the optical signals of the second communication protocol and the optical signals of the third communication protocol, allowing the optical signals of the first communication protocol to be transmitted to the sixth filter 416. Thus, the third filter 413 separates the optical signals of the first communication protocol from the optical signals of the second communication protocol and the optical signals of the third communication protocol. The sixth filter 416 is disposed opposite the first optical chip in the integrated first optical receiver 31 and second optical receiver 32. The sixth filter 416 removes impurity optical signals from the optical signal of the first communication protocol emitted by the third filter 413 and transmits the filtered optical signal to the first optical receiver 31.

[0148] The reflective film 402 is attached or formed on a partial surface where the adjusting prism is located on the reflected optical path of the third filter 413. The fourth filter 414 in the second filter group 41b is located on the receiving optical path of the second optical receiver 32. In addition, the fourth filter 414 is attached to a partial surface where the adjusting prism is located on the reflected optical path of the reflective film 402. The seventh filter 417 is positioned facing the second optical chip in the integrated first optical receiver 31 and second optical receiver 32. The fourth filter 414 and the seventh filter 417 are arranged sequentially along the light incident direction of the second optical receiver 32. The reflective film 402 includes an optical signal of the second communication protocol and an optical signal of the third communication protocol, and reflects the second combined optical signal reflected by the third filter 413 to the fourth filter 414. The fourth filter 414 may reflect the optical signal of the third communication protocol to the seventh filter 417, allowing the optical signal of the second communication protocol to be transmitted to the seventh filter 417. Thus, the fourth filter 414 may separate the optical signal of the second communication protocol from the optical signal of the third communication protocol. The seventh filter 417 may remove impurity optical signals from the optical signal of the second communication protocol emitted by the fourth filter 414, and transmit the filtered optical signal to the second optical receiver 32.

[0149] The third filter group 41c includes a fifth filter 415, which is located on the reflected optical path of the fourth filter 414 and is disposed opposite the third optical receiver 33. The fifth filter 415 may remove impurity optical signals from the optical signal of the third communication protocol reflected by the fourth filter 414, and transmit the filtered optical signal to the third optical receiver 33.

[0150] Compared with Example 5, in this example, the number of filters 410 required by the optical receiving device 3 of this example is reduced to 7. In addition, the distribution manner of the optical film assembly 4 in the example is applicable to a scenario in which any two of the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 are integrated into a single structure.

[0151] In addition, similarly, the first filter 411 is located on the optical emission path of the first laser emitter 21, the optical emission path of the second laser emitter 22, and the optical emission path of the third laser emitter 23. The first filter 411 may further enable a combined optical signal of the optical signal of the first communication protocol emitted by the first laser emitter 21, the optical signal of the second communication protocol emitted by the second laser emitter 22, and the optical signal of the third communication protocol emitted by the third laser emitter 23 to be transmitted to the optical connector 1.

[0152] It will be understood that the adjustment prism may be replaced by an adjustment support, and the reflective film 402 may be replaced by a reflector, which is not a limitation of the present application.

[0153] Additionally, the Z-block filter assembly 40 and the housing 10 may be assembled in the following manner.

[0154] S301: The filter 410 and the Z-block filter assembly 40 are movably mounted in a predetermined mounting position in the housing 10.

[0155] For example, the mounting positions and mounting angles of the multiple filters 41 and Z-block filter assembly 40 within the housing 10 are designed based on the distribution positions of the optical emitting device 2 and the optical receiving device 3 within the housing 10 to ensure the demultiplexing function of the multiple filters 41. The mounting positions are preset mounting positions, and the mounting angles are preset mounting angles. Adhesive is applied at multiple preset mounting positions on the inner wall of the housing 10.

[0156] S302: Input the detection light into the optical connector 1, and adjust the mounting angle of the Z-block filter assembly 40 in the housing 10 until the angle at which the beam is emitted when the detection light passes through another filter 410 and the filter 410 in the Z-block filter assembly 40 reaches a preset light emission angle.

[0157] For example, one side of the Z-block filter assembly 40 is attached to an adhesive layer on the mounting surface 102. The mounting angle of the filter 410 is adjusted using the side line or corner of the adjustment prism as a mounting reference until the mounting angle of the filter 410 reaches a preset mounting angle. The process of assembling and debugging the remaining filter 410 and the inner wall of the housing 10 may be the same as the side mounting process of the filter 410 in Example 1. Details will not be repeated here. The remaining filter 410 may be directly fastened to the housing 10 using the fastening frame 101, or may be connected to the inner wall of the housing 10 using a side mounting method.

[0158] S303: Fasten the Z-block filter assembly 40 and the housing 10 together.

[0159] For example, a pre-curing operation may first be performed on the adhesive layer between the Z-block filter assembly 40 and the inner wall of the housing 10, and on the adhesive layer between the inner wall of the housing 10 and the side surfaces of the plurality of filters 41. Specifically, the adhesive layer may be cured using UV light. Then, a further curing operation may be performed on the adhesive layer between the Z-block filter assembly 40 and the inner wall of the housing 10, and on the adhesive layer between the inner wall of the housing 10 and the side surfaces 4101 of the plurality of filters 41. Specifically, a light curing or heat curing process may be used.

[0160] Example 7 The structure of this exemplary optical device 200 is similar to that of Example 6, but differs in that, as shown in Fig. 32, the optical receiving device 3 of this exemplary optical device 200 has a first optical receiver 31, a second optical receiver 32, and a third optical receiver 33 integrated into an integrated structure. The optical receiving device 3 may be mounted in a box or coaxially. Therefore, the degree of integration of the optical receiving device 3 is high, the volume of the optical receiving device 3 is small, and the optical device 200 can be easily miniaturized.

[0161] 32, the Z-block filter assembly 40 of this example further includes a first reflective film 4021, a second reflective film 4022, and a fifth filter 415 in the third filter group 41c. The first reflective film 4021 is located on a partial surface where the adjustment prism is located on the reflected light path of the third filter 413. The fourth filter 414 is located on a partial surface where the adjustment prism is located on the reflected light path of the first reflective film 4021. The second reflective film 4022 is located on a partial surface where the adjustment prism is located on the reflected light path of the fourth filter 414. The fifth filter 415 is located on a partial surface where the adjustment prism is located on the reflected light path of the second reflective film 4022. The specific optical paths are the same as those in the previous example and will not be described again here.

[0162] The third filter group 41c further includes an eighth filter 418, which is disposed opposite the third optical chip in the integrated first optical receiver 31, second optical receiver 32, and third optical receiver 33. The eighth filter 418 removes impurity optical signals from the optical signals of the third communication protocol transmitted by the third filter 413, and transmits the filtered optical signals to the third optical receiver 33.

[0163] Example 8 The structure of the optical device 200 of this example is similar to that of Example 7, except that the Z-block filter assembly 40, the first optical receiver 31, the second optical receiver 32, and the third optical receiver 33 of the optical device 200 of this example are integrated into a single structure, as shown in Fig. 33. The mounting form shown in Fig. 33 is a box mounting. In this case, the sixth filter 416, the seventh filter 417, and the eighth filter 418 may not be disposed.

[0164] Example 9 The structure of the optical device 200 of this example is similar to that of Example 8, except that the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 of the light-emitting device 2 in the optical device 200 of this example are integrally mounted together, as shown in Fig. 34. Therefore, the integration degree of the light-emitting device 2 is high, the volume of the light-emitting device 2 is small, and the miniaturization of the optical device 200 is further facilitated.

[0165] In addition, optical device 200 of this example includes first Z-block filter assembly 40a and second Z-block filter assembly 40b, the composition of first Z-block filter assembly 40a is the same as the composition of Z-block filter assembly 40 of Example 8, and the adjustment support kit in first Z-block filter assembly 40a is first adjustment support kit 401a. First Z-block filter assembly 40a, first optical receiver 31, second optical receiver 32, and third optical receiver 33 are integrated into a single structure.

[0166] The second Z-block filter assembly 40b, the first laser 21, the second laser 22, and the third laser 23 are integrated into a single structure. The second Z-block filter assembly 40b includes a second adjustment support kit 401b, a third reflective film 4023, a fourth reflective film 4024, a tenth filter 420, and an eleventh filter 421. The second adjustment support kit 401b is specifically an adjustment prism. The third reflective film 4023 is located on a partial surface of the radiation optical path of the first laser 21 where the second adjustment support kit 401b is located. The tenth filter 420 is located on a partial surface of the radiation optical path of the third reflective film 4023 where the second adjustment support kit 401b is located.

[0167] An optical signal of a third communication protocol emitted by a third laser emitter chip in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 is reflected from the third reflective film 4023 to the tenth filter 420 using the second adjustment support kit 401b. The tenth filter 420 combines the optical signal of the second communication protocol emitted by the second laser emitter chip and the optical signal of the third communication protocol emitted by the third laser emitter chip in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23, and reflects the third combined optical signal.

[0168] The fourth reflecting film 4024 is located on a partial surface where the second adjusting support kit 401b is located on the reflected light path of the tenth filter 420. The eleventh filter 421 is located on a partial surface where the second adjusting support kit 401b is located on the reflected light path of the fourth reflecting film 4024.

[0169] The fourth reflective film 4024 reflects the third combined optical signal to the eleventh filter 421. The eleventh filter 421 combines the third combined optical signal with the optical signals of the first communication protocol emitted by the first laser emitter chips in the integrated first laser emitter 21, second laser emitter 22, and third laser emitter 23 into a fourth combined optical signal, and transmits the fourth combined optical signal to the optical connector 1.

[0170] In addition, the second Z-block filter assembly 40b, the first laser emitter 21, the second laser emitter 22, and the third laser emitter 23 are integrally mounted in a unitary structure. The mounting form shown in Figure 34 is a box mounting.

[0171] It will be understood that the adjustment prism may be replaced by an adjustment support, and the third reflective film 4023 and the fourth reflective film 4024 may be replaced by a reflector, which is not limited in this application.

[0172] Example 10 The structure of the optical device 200 of this example is similar to that of Example 9, except that the light output port of the integrated light emitting device 2 and the light input port of the integrated light receiving device 3 in the optical device 200 of this example face the same direction, as shown in Fig. 35. In addition, the first filter group 41a further includes a twelfth filter 422, which is disposed on the optical path between the second filter 412 and the third filter 413 and is configured to reflect the first combined optical signal, which is reflected by the second filter 412 and includes an optical signal of the first communication protocol, an optical signal of the second communication protocol, and an optical signal of the third communication protocol, to the third filter 413.

[0173] The above description is merely a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0174] The above description is merely a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. [Explanation of symbols]

[0175] 1000 Optical Modem 100 Circuit Boards 200 Optical Devices 10. Cabinet 101 Fastening Frame 102 Mounting surface 1 Optical Connector 2 Light emitting device 20 / 20a / 20b laser emitter 21 First laser emitter 22 Second laser emitter 23 Third Laser Emitter 3 Optical receiving device 30 / 30a / 30b Optical Receiver 31 First Optical Receiver 32 Second Optical Receiver 33 Third Optical Receiver 4 Optical film assembly 41 Multiple Filters 410 Filter 4101 / 4101a side 41a First filter group 41b Second filter group 41c Third Filter Group 41d Fourth filter group 411 First Filter 412 Second Filter 413 Third Filter 414 Fourth Filter 415 Fifth Filter 416 Sixth Filter 417 Seventh Filter 418 8th Filter 419 9th Filter 420 10th Filter 421 11th Filter 422 12th Filter 42 Isolator 42a First Isolator 42b Second Isolator 42c Third Isolator 43 Collimating Lens 431 First collimating lens 432 Second Collimating Lens 40 Z-block filter assembly 40a First Z-block filter assembly 40b Second Z-block filter assembly 401 Adjustable Support Kit 401a First Adjustment Support Kit 401b Second Adjustment Support Kit 402 Reflective film / reflector 4021 First Reflective Film 4022 Second Reflective Film 4023 Third Reflective Film 4024 4th Reflective Film 5 Adjustment Frame 501 First Adjustment Frame 502 Second Adjustment Frame 503 Third Adjustment Frame 51 Mounting bracket 52 Adjustment stand 521 Adjustment Slot 6 Drive piece

Claims

1. an optical connector; an optical emitting device comprising a first laser emitter, a second laser emitter, and a third laser emitter, the first laser emitter, the second laser emitter, and the third laser emitter being respectively configured to emit optical signals of three different communication protocols; an optical receiving device comprising a first optical receiver, a second optical receiver, and a third optical receiver, the first optical receiver, the second optical receiver, and the third optical receiver being configured to receive optical signals of the three different communication protocols, respectively; A plurality of filters, the plurality of filters comprising: a first filter group, the first filter group being located on a receiving optical path of the first optical receiver, the first filter group being configured to introduce an optical signal of a first communication protocol within the optical signal having the three different communication protocols and introduced from the optical connector to the first optical receiver, and to extract an optical signal of a second communication protocol and an optical signal of a third communication protocol within the optical signal having the three different communication protocols; a second filter group located on an optical path from the first filter group to the second optical receiver, the second filter group configured to introduce the optical signal of the second communication protocol derived from the first filter group to the second optical receiver and to derive the optical signal of the third communication protocol; and a third filter group, the third filter group being located on an optical path from the second filter group to the third optical receiver and configured to introduce the optical signal of the third communication protocol derived from the second filter group into the third optical receiver; and a fourth filter group, the fourth filter group being located in the output optical paths of the first laser emitter, the second laser emitter, and the third laser emitter, the fourth filter group being configured to combine an optical signal of a first communication protocol emitted by the first laser emitter, an optical signal of a second communication protocol emitted by the second laser emitter, and an optical signal of a third communication protocol emitted by the third laser emitter, and introduce the combined optical signal into the optical connector; a plurality of filters comprising: An optical device comprising:

2. 2. The optical device of claim 1, further comprising a housing, wherein the plurality of filters are all located within the housing, a mounting surface is formed on an inner wall of the housing, and at least one side of the plurality of filters is bonded to the mounting surface.

3. The optical device comprises: the housing, wherein all of the plurality of filters are located within the housing; a Z-block filter assembly comprising at least one of the plurality of filters and an adjustment support kit, all filters in the Z-block filter assembly being disposed on the adjustment support kit, and the adjustment support kit being joined to the housing; The optical device according to claim 1 or 2, further comprising:

4. The optical device comprises: the housing, wherein all of the plurality of filters are located within the housing; at least one adjustment frame, the at least one adjustment frame being connected to the inner wall of the housing, and at least one of the plurality of filters being separately disposed on the at least one adjustment frame; The optical device according to claim 1 , further comprising:

5. the first filter group comprises a first filter and a second filter sequentially arranged in a light incident direction of the first optical receiver, the first filter being arranged opposite the optical connector and comprising the three different communication protocols, and configured to reflect the optical signal of the first communication protocol within the optical signal introduced via the optical connector to the second filter to enable transmission of the optical signal of the second communication protocol and the optical signal of the third communication protocol within the optical signal comprising the three different communication protocols, and the second filter being configured to reflect the optical signal reflected by the first filter to the first optical receiver; the second filter group comprises a third filter and a fourth filter sequentially arranged in a light incident direction of the second optical receiver, the third filter being located on a transmission optical path of the first filter and configured to reflect the optical signal of the second communication protocol transmitted by the first filter to the fourth filter, thereby enabling transmission of the optical signal of the third communication protocol, and the fourth filter being configured to reflect the optical signal reflected by the third filter to the second optical receiver; 5. The optical device according to claim 1, wherein the third filter group comprises a fifth filter and a sixth filter arranged sequentially along a light incident direction of the third optical receiver, the fifth filter being located on a transmission optical path of the third filter and configured to reflect an optical signal of the third communication protocol transmitted by the third filter to the sixth filter, and the sixth filter being configured to reflect the optical signal reflected by the fifth filter to the third optical receiver.

6. the first filter group further comprises a seventh filter located on the reflected optical path of the second filter, the seventh filter being disposed opposite the first optical receiver and configured to remove an impurity optical signal in the optical signal reflected by the second filter and enable the filtered optical signal to be transmitted to the first optical receiver; the second filter group further comprises an eighth filter located on the reflected optical path of the fourth filter, the eighth filter being disposed opposite the second optical receiver and configured to remove an impurity optical signal in the optical signal reflected by the fourth filter and enable the filtered optical signal to be transmitted to the second optical receiver; 6. The optical device of claim 5, wherein the third filter group further comprises a ninth filter located on the reflected optical path of the sixth filter, the ninth filter located opposite the third optical receiver and configured to remove impurity optical signals in the optical signal reflected by the sixth filter and enable the filtered optical signal to be transmitted to the third optical receiver.

7. The optical device comprises: the housing, wherein all of the plurality of filters are located within the housing; Three adjustable frames, all of which are connected to the inner wall of the housing, and the three adjustable frames are: a first adjustable frame, the second filter being attached to the first adjustable frame; and a second adjustable frame, the fourth filter being attached to the second adjustable frame; and a third adjustable frame, the sixth filter being attached to the third adjustable frame; and Three adjustment frames, The optical device according to claim 5 or 6, further comprising:

8. the first filter group comprises a first filter, a second filter, and a third filter sequentially arranged in a light incident direction of the first optical receiver, the first filter being arranged facing the optical connector, the first filter being configured to reflect the optical signals having the three different communication protocols and introduced via the optical connector to the second filter, the second filter being configured to reflect the optical signals having the three different communication protocols to the third filter, the third filter being configured to reflect the optical signals of the second communication protocol and the optical signals of the third communication protocol within the optical signals reflected by the second filter having the three different communication protocols, thereby enabling the optical signals of the first communication protocol to be transmitted to the first optical receiver; the second filter group comprises a fourth filter located on an optical path from the third filter to the second optical receiver, the fourth filter being configured to reflect the optical signal of the second communication protocol within the optical signal reflected by the third filter to allow the optical signal of the second communication protocol to be transmitted to the second optical receiver; 5. The optical device of claim 1, wherein the third filter group comprises a fifth filter located on an optical path from the fourth filter to the third optical receiver, the fifth filter being configured to reflect the optical signal of the third communication protocol reflected by the fourth filter to the third optical receiver.

9. the first filter group further includes a sixth filter located on a transmission optical path of the third filter, the sixth filter being disposed opposite the first optical receiver and configured to remove an impurity optical signal in the optical signal transmitted by the third filter and transmit the optical signal to the first optical receiver; the second filter group further includes a seventh filter located on a transmission optical path of the fourth filter, the seventh filter being disposed opposite the second optical receiver and configured to remove an impurity optical signal in the optical signal transmitted by the fourth filter and transmit the optical signal to the second optical receiver; 9. The optical device of claim 8, wherein the third filter group further comprises an eighth filter located on the reflected optical path of the fifth filter, the eighth filter being positioned opposite the third optical receiver and configured to remove impurity optical signals in the optical signal reflected by the fifth filter and transmit the optical signal to the third optical receiver.

10. The optical device comprises: the housing, wherein all of the plurality of filters are located within the housing; Three adjustable frames, all of which are connected to the inner wall of the housing, and the three adjustable frames are: a first adjustable frame, the second filter being attached to the first adjustable frame; and a second adjustable frame, the third filter being attached to the second adjustable frame; and a third adjustable frame, wherein the fourth filter or the fifth filter is attached to the third adjustable frame; and Three adjustment frames, The optical device according to claim 8 or 9, further comprising:

11. an optical path from the second laser emitter to the optical connector intersects an optical path from the third laser emitter to the optical connector, and the fourth filter group includes: a tenth filter, the tenth filter being disposed at an intersection of an optical path from the second laser emitter to the optical connector and an optical path from the third laser emitter to the optical connector, the tenth filter being configured to synthesize and combine the optical signal of the second communication protocol emitted by the second laser emitter and the optical signal of the third communication protocol emitted by the third laser emitter, and derive the combined optical signal, wherein the optical path from the first laser emitter to the optical connector intersects with the output optical path of the tenth filter; an eleventh filter, the eleventh filter being disposed at an intersection of the optical path from the first laser emitter to the optical connector and the output optical path of the tenth filter, the eleventh filter being configured to combine an optical signal derived from the tenth filter with the optical signal of the first communication protocol emitted by the first laser emitter, and to introduce the combined optical signal into the optical connector; The optical device of claim 1 , further comprising:

12. 12. The optical device of claim 1, wherein any two of the first laser emitter, the second laser emitter, and the third laser emitter are integrally mounted in a monolithic structure, or the first laser emitter, the second laser emitter, and the third laser emitter are integrally mounted in a monolithic structure.

13. any two of the first optical receiver, the second optical receiver, and the third optical receiver are integrally mounted in a unitary structure; or The optical device of claim 1 , wherein any two of the first optical receiver, the second optical receiver, and the third optical receiver are integrally mounted in a monolithic structure.

14. 14. The optical device of claim 1, wherein the first laser emitter, the second laser emitter, the third laser emitter, the first optical receiver, the second optical receiver, and the third optical receiver are each mounted by coaxial mounting or box mounting.

15. A circuit board; 15. The optical device according to claim 1, wherein the optical device is electrically connected to the circuit board; An optical communication device comprising:

16. Mounting a plurality of filters at predetermined reference positions within a housing, at least one filter being fixedly mounted to an adjustment frame, the adjustment frame being movably connected to the housing; inputting detection light into an optical connector, and sequentially adjusting the mounting angles of the filters in the optical path arrangement using the adjustment frame until the beam of detection light derived or introduced from the plurality of filters reaches a preset angle; fastening the adjustment frame to the housing; 11. The method for assembling the optical device according to claim 4, 7, or 10, comprising:

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