CN114384650A

CN114384650A - Optical module

Info

Publication number: CN114384650A
Application number: CN202011141725.4A
Authority: CN
Inventors: 方春伦; 蔚永军; 张海祥
Original assignee: Guangdong Hisense Broadband Technology Co ltd
Current assignee: Guangdong Hisense Broadband Technology Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-04-22
Anticipated expiration: 2040-10-22
Also published as: CN114384650B

Abstract

The application discloses optical module connects light emitting device and optic fibre adapter respectively at the relative both ends face of body, and adjacent third terminal surface and first silk terminal surface are provided with first light receiving element and second light receiving element. The optical module provided by the application has the advantages that in the light emitting process, signal light at different positions perpendicular to the first end face passes through the first optical filter, the incident angles are the same, the optical distances are the same, and the incident angles are different and the optical distances are different when the signal light passes through the second optical filter; the signal light parallel to the first end face and in different positions has different incident angles and different optical paths when passing through the first optical filter and has the same incident angle and the same optical path when passing through the second optical filter, so that the first optical filter and the second optical filter have the same influence on the signal light, the generated aberration is the same, astigmatism is avoided, and the coupling efficiency is improved.

Description

Optical module

Technical Field

The application relates to the technical field of communication, in particular to an optical module.

Background

The optical module realizes the function of photoelectric conversion in the technical field of optical fiber communication, and the intensity of an optical signal input into an external optical fiber by the optical module directly influences the quality of optical fiber communication. With the development of the optical communication technology, the optical line terminal optical module is required TO meet a higher power budget, and the power requirement is also improved for a front-end chip, a TO and an OSA component, so that it is important TO improve the coupling efficiency of the OSA component in order TO meet the power requirement of the module terminal.

In an optical component product, a wavelength division function is usually realized by inserting an optical filter into an optical path, but the optical filter is inserted into a non-parallel light path for light division, so that aberration is introduced due to different incident angles and different optical paths of light rays at different aperture positions of a light beam on the surface of the optical filter, and finally coupling efficiency is reduced.

Disclosure of Invention

The application provides an optical module to improve optical coupling efficiency in an optical module.

In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:

the embodiment of the application discloses an optical module, includes: a circuit board;

the optical transceiving component is electrically connected with the circuit board and is used for transmitting and receiving optical signals;

wherein the optical transceiver component comprises:

the device comprises a pipe body, a first jack and a second jack are respectively arranged at two opposite ends of the pipe body, a third jack is arranged at a third end of the pipe body, a fourth jack is arranged at a fourth end of the pipe body, and the third end and the fourth end are arranged at two adjacent ends of the pipe body;

the light emitting device is inserted into the first jack, is electrically connected with the circuit board and is used for emitting a light signal;

the optical fiber adapter is inserted in the second jack and used for receiving the optical signal emitted by the light emitting device;

the first optical filter is arranged between the first jack and the second jack, is perpendicular to the third end face, has an included angle of 45 degrees with the first end face, and is used for transmitting the optical signal emitted by the light emitting device and reflecting the optical signal from the optical fiber adapter;

the second optical filter is arranged between the first optical filter and the second jack, forms an included angle of 45 degrees with the third end face and the second end face respectively, and is used for transmitting the optical signal emitted by the light emitting device and reflecting the optical signal from the optical fiber adapter;

the first light receiving device is inserted into the third jack, is electrically connected with the circuit board and is used for receiving the light signal reflected by the second optical filter;

and the second light receiving device is inserted in the fourth jack, is electrically connected with the circuit board and is used for receiving the light signal reflected by the first optical filter.

Optionally, the first filter and the second filter have the same thickness.

Optionally, the thicknesses of the first optical filter and the second optical filter are both 0.2 mm.

Optionally, the optical fiber adapter includes an optical fiber ferrule, and the optical fiber ferrule is disposed in the second receptacle and is configured to receive an optical signal transmitted by the light emitting device.

Optionally, the end face of the optical fiber ferrule is an inclined end face, and the inclined end face is inclined upward in the direction from the second optical filter to the second insertion hole, so that the incident light path of the end face of the optical fiber ferrule is different from the reflected light path.

Optionally, one end of the light through hole, which is close to the first jack, is provided with a light inlet, and the light through hole is communicated with the first jack through the light inlet; one end of the first light through hole, which is close to the first optical filter, is provided with a light outlet, and the size of the light inlet of the light through hole is larger than that of the light outlet.

Optionally, the central axis of the light through hole coincides with the central axis of the light signal emitted by the light emitting device.

Optionally, the optical transceiver module further includes an adjusting ring, and the adjusting ring is disposed between the square tube body and the optical fiber adapter, and is used for adjusting a distance between the light emitting device and the optical fiber ferrule.

Compared with the prior art, the beneficial effect of this application is:

the application discloses optical module, at the body, its relative both ends face is provided with first jack and second jack respectively, and its third terminal surface is provided with the third jack, and the fourth terminal surface is provided with the fourth jack, the third terminal surface with the fourth terminal surface does the adjacent both ends face of body. And the light emitting device is inserted in the first jack, is electrically connected with the circuit board and is used for emitting a light signal. And the optical fiber adapter is inserted in the second jack and used for receiving the optical signal emitted by the light emitting device. And the first optical filter is arranged between the first jack and the second jack, is perpendicular to the third end surface, has an included angle of 45 degrees with the first end surface, and is used for transmitting the optical signal emitted by the light emitting device and reflecting the optical signal from the optical fiber adapter. And the second optical filter is arranged between the first optical filter and the second jack, forms an included angle of 45 degrees with the third end surface and the second end surface respectively, and is used for transmitting the optical signal emitted by the light emitting device and reflecting the optical signal from the optical fiber adapter. And the first light receiving device is inserted in the third jack, is electrically connected with the circuit board and is used for receiving the light signal reflected by the second optical filter. And the second light receiving device is inserted in the fourth jack, is electrically connected with the circuit board and is used for receiving the light signal reflected by the first optical filter. The signal light emitted by the light emitting device sequentially passes through the first optical filter and the second optical filter to enter the light adapter. In the process, signal light at different positions vertical to the first end face passes through the first optical filter, the incident angles and the optical paths are the same, and the incident angles and the optical paths are different when the signal light passes through the second optical filter; the signal light parallel to the first end face and in different positions has different incident angles and different optical paths when passing through the first optical filter and has the same incident angle and the same optical path when passing through the second optical filter, so that the first optical filter and the second optical filter have the same influence on the signal light, the generated aberration is the same, astigmatism is avoided, and the coupling efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an optical network terminal according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an optical module according to an embodiment of the present disclosure;

fig. 4 is an exploded structural diagram of an optical module according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an optical transceiver module according to an embodiment of the present disclosure;

fig. 6 is an exploded view of an optical transceiver module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a pipe body according to an embodiment of the present application;

fig. 8 is a first schematic cross-sectional structure diagram of an optical transceiver module according to an embodiment of the present disclosure;

fig. 9 is a schematic cross-sectional structure diagram of an optical transceiver module according to an embodiment of the present disclosure;

fig. 10 is a first optical path diagram of an optical transmission process of an optical transceiver module according to an embodiment of the present application;

FIG. 11 is a first optical path diagram illustrating a light receiving process of the light transceiver module in the same direction as FIG. 10;

fig. 12 is a light emitting process optical path diagram ii of the optical transceiver module according to the embodiment of the present application;

fig. 13 is a second optical path diagram of the optical receiving process of the optical transceiver module in the same direction as fig. 12.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

One of the core links of optical fiber communication is the interconversion of optical and electrical signals. The optical fiber communication uses optical signals carrying information to transmit in information transmission equipment such as optical fibers/optical waveguides, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of light in the optical fibers/optical waveguides; meanwhile, the information processing device such as a computer uses an electric signal, and in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer, it is necessary to perform interconversion between the electric signal and the optical signal.

The optical module realizes the function of interconversion of optical signals and electrical signals in the technical field of optical fiber communication, and the interconversion of the optical signals and the electrical signals is the core function of the optical module. The optical module is electrically connected with an external upper computer through a golden finger on an internal circuit board of the optical module, and the main electrical connection comprises power supply, I2C signals, data information, grounding and the like; the electrical connection mode realized by the gold finger has become the mainstream connection mode of the optical module industry, and on the basis of the mainstream connection mode, the definition of the pin on the gold finger forms various industry protocols/specifications.

Fig. 1 is a schematic diagram of connection relationship of an optical communication terminal. As shown in fig. 1, the connection of the optical communication terminal mainly includes interconnection among the optical network terminal 100, the optical module 200, the optical fiber 101, and the network cable 103.

One end of the optical fiber 101 is connected with a far-end server, one end of the network cable 103 is connected with local information processing equipment, and the connection between the local information processing equipment and the far-end server is completed by the connection between the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is made by the optical network terminal 100 having the optical module 200.

An optical port of the optical module 200 is externally accessed to the optical fiber 101, and establishes bidirectional optical signal connection with the optical fiber 101; an electrical port of the optical module 200 is externally connected to the optical network terminal 100, and establishes bidirectional electrical signal connection with the optical network terminal 100; the optical module realizes the mutual conversion of optical signals and electric signals, thereby realizing the establishment of information connection between the optical fiber and the optical network terminal. Specifically, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input to the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input to the optical fiber.

The optical network terminal is provided with an optical module interface 102, which is used for accessing an optical module 200 and establishing bidirectional electric signal connection with the optical module 200; the optical network terminal is provided with a network cable interface 104, which is used for accessing the network cable 103 and establishing bidirectional electric signal connection with the network cable 103; the optical module 200 is connected to the network cable 103 via the optical network terminal 100. Specifically, the optical network terminal transmits a signal from the optical module to the network cable and transmits the signal from the network cable to the optical module, and the optical network terminal serves as an upper computer of the optical module to monitor the operation of the optical module.

At this point, a bidirectional signal transmission channel is established between the remote server and the local information processing device through the optical fiber, the optical module, the optical network terminal and the network cable.

Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network terminal is an upper computer of the optical module, provides data signals for the optical module, and receives the data signals from the optical module, and the common upper computer of the optical module also comprises an optical line terminal and the like.

Fig. 2 is a schematic diagram of an optical network terminal structure. As shown in fig. 2, the optical network terminal 100 has a first circuit board 105, and a cage 106 is disposed on a surface of the first circuit board 105; an electric connector is arranged in the cage 106 and used for connecting an electric port of an optical module such as a golden finger; the cage 106 is provided with a heat sink 107, and the heat sink 107 has a projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into the optical network terminal 100, specifically, an electrical port of the optical module is inserted into an electrical connector inside the cage 106, and an optical port of the optical module is connected to the optical fiber 101.

The cage 106 is positioned on the first circuit board, and the electrical connector on the first circuit board is wrapped in the cage, so that the electrical connector is arranged inside the cage; the optical module is inserted into the cage, held by the cage, and the heat generated by the optical module is conducted to the cage 106 and then diffused by the heat sink 107 on the cage.

Fig. 3 is a schematic diagram of an optical module structure provided in the embodiment of the present application, and fig. 4 is an exploded schematic diagram of an optical module provided in the embodiment of the present application. As shown in fig. 3 and 4, an optical module 200 provided in the embodiment of the present application includes an upper housing 201, a lower housing 202, an unlocking member 203, a circuit board 300, and an optical transceiver module 400.

The upper shell 201 is covered on the lower shell 202 to form a wrapping cavity with two openings; the outer contour of the packaging cavity generally presents a square body. Specifically, the lower housing 202 includes a main board and two side boards located at two sides of the main board and arranged perpendicular to the main board; the upper shell comprises a cover plate, and the cover plate covers two side plates of the upper shell to form a wrapping cavity; the upper shell may further include two side walls disposed at two sides of the cover plate and perpendicular to the cover plate, and the two side walls are combined with the two side plates to cover the upper shell 201 on the lower shell 202.

The two openings may be two ends (204, 205) in the same direction, or two openings in different directions; one opening is an electric port 204, and a gold finger of the circuit board extends out of the electric port 204 and is inserted into an upper computer such as an optical network terminal; the other opening is an optical port 205 for external optical fiber access to connect with the optical transceiver module 400 inside the optical module; the photoelectric devices such as the circuit board 300 and the optical transceiver module 400 are positioned in the packaging cavity.

The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board 300, the optical transceiver module 400 and other devices can be conveniently installed in the shells, and the upper shell and the lower shell form the outermost packaging protection shell of the module; the upper shell and the lower shell are made of metal materials generally, electromagnetic shielding and heat dissipation are achieved, the shell of the optical module cannot be made into an integral component generally, and therefore when devices such as a circuit board are assembled, the positioning component, the heat dissipation component and the electromagnetic shielding component cannot be installed, and production automation is not facilitated.

The unlocking component 203 is located on the outer wall of the wrapping cavity/lower shell 202, and is used for realizing the fixed connection between the optical module and the upper computer or releasing the fixed connection between the optical module and the upper computer.

The unlocking component 203 is provided with a clamping component matched with the upper computer cage; the end of the unlocking component can be pulled to enable the unlocking component to move relatively on the surface of the outer wall; the optical module is inserted into a cage of the upper computer, and the optical module is fixed in the cage of the upper computer by a clamping component of the unlocking component; by pulling the unlocking component, the clamping component of the unlocking component moves along with the unlocking component, so that the connection relation between the clamping component and the upper computer is changed, the clamping relation between the optical module and the upper computer is released, and the optical module can be drawn out from the cage of the upper computer.

The circuit board 300 is provided with circuit traces, electronic components (such as capacitors, resistors, triodes, and MOS transistors), and chips (such as an MCU, a laser driver chip, a limiting amplifier chip, a clock data recovery CDR, a power management chip, and a data processing chip DSP).

The circuit board 300 connects the electrical devices in the optical module together according to the circuit design through circuit wiring to realize the electrical functions of power supply, electrical signal transmission, grounding and the like.

The circuit board is generally a hard circuit board, and the hard circuit board can also realize a bearing effect due to the relatively hard material of the hard circuit board, for example, the hard circuit board can stably bear a chip; when the optical transceiver component is positioned on the circuit board, the rigid circuit board can also provide stable bearing; the hard circuit board can also be inserted into an electric connector in the upper computer cage, and specifically, a metal pin/golden finger is formed on the surface of the tail end of one side of the hard circuit board and is used for being connected with the electric connector; these are not easily implemented with flexible circuit boards.

A flexible circuit board is also used in a part of the optical module to supplement a rigid circuit board; the flexible circuit board is generally used in combination with a rigid circuit board, for example, the rigid circuit board may be connected to the optical transceiver module by using the flexible circuit board.

The optical transceiver component comprises an optical transmitter and an optical receiver, which are respectively used for transmitting optical signals and receiving optical signals. The optical transceiver module 400 in the optical module 200 includes an optical module for implementing optical signal and electrical signal conversion, and the optical module includes: the optical fiber adapter comprises a light emitting device, a tube body, a light receiving device and an optical fiber adapter, wherein one end of the light emitting device is connected with the circuit board 300, and the other end of the light emitting device is fixed in the tube body; the optical fiber adapter is fixed at the other end of the tube body, and an optical signal sent by the light emitting device enters an optical fiber inserting core in the optical fiber adapter through the tube body; the optical receiving device is fixed at the third end of the tube body, the central axis of the optical receiving device is generally vertical to the central axis of the light emitting device, and optical signals emitted by the optical fiber inserting core in the optical fiber adapter enter the optical receiving device after being reflected by the optical filter in the tube body.

The optical transceiver module 400 further includes an adjusting ring 406, the adjusting ring 406 is disposed between the square tube body and the fiber adapter 405, the adjusting ring 406 is screwed on the square tube body, and the distance between the light emitting device 401 and the fiber stub 4051 in the fiber adapter 405 can be adjusted by the adjusting ring 406.

Fig. 5 is a schematic structural diagram of an optical transceiver module according to an embodiment of the present disclosure, and fig. 6 is an exploded schematic structural diagram of an optical transceiver module according to an embodiment of the present disclosure; fig. 7 is a schematic structural diagram of a tube according to an embodiment of the present application.

As shown in fig. 5, 6 and 7, the optical transceiver module includes: a body 402, a light emitting device 401, a light adapter 405. The tube 402 is provided with a first insertion hole 40211 and a second insertion hole 40221 opposite to the first end surface 4021 and the second end surface 4022, and the light emitting device 401 is inserted into the first insertion hole 40211, electrically connected to the circuit board 300, and configured to emit a light signal. The light emitting device 401 includes a converging lens 4011, light emitted by the laser is diverging light, and converges after passing through the lens 4011, and a light spot of a converging light beam is gradually changed from a large light spot to a small light spot. And a fiber adapter 405 inserted into the second insertion hole 40221 for receiving an optical signal emitted from the light emitting device 401. The tube body 402 is used for realizing the fixed connection between the light emitting device 401 and the optical fiber adapter 405, an optical signal is transmitted into the optical fiber adapter 405 through the tube body 402, an optical fiber insertion core 4051 is installed in the optical fiber adapter 405, the optical fiber insertion core 4051 is an optical fiber wrapped by ceramic, and the optical signal is emitted through the optical fiber insertion core 4051.

The end face of the fiber stub 4051 is an inclined end face, and the inclined end face is inclined upward in the direction from the first end face 4021 to the second end face 4022, so that the incident optical path and the reflected optical path of the end face of the fiber stub are different.

The optical module provided in this embodiment realizes the transmission and dual reception of light through the same optical fiber, and therefore, the optical transceiver module 400 further includes: a first light receiving device 403 and a second light receiving device 404. Third insertion hole 40231 is provided in third end surface 4023 of pipe 402, fourth insertion hole 40241 is provided in fourth end surface 4024, and third end surface 4023 and fourth end surface 4024 are adjacent end surfaces of pipe 402. The first light receiving device 403 is inserted into the third insertion hole 40231 and electrically connected to the circuit board 300. The second light receiving device 404 is inserted into the fourth inserting hole 40241 and electrically connected to the circuit board 300.

The transmission of the optical signal converted from the electrical signal can be realized in the pipe body 402 and the optical signal is emitted by the optical fiber insertion core 4051, and the optical signal transmitted by the optical fiber insertion core 4051 can be further transmitted to the first light receiving device 403 and the second light receiving device 404, and the optical signal is converted into the electrical signal by the first light receiving device 403 and the second light receiving device 404. For this reason, the light emitting device 401, the first light receiving device 403, the second light receiving device 404, and the optical fiber adapter 405 are fixed to the tube.

The pipe body 402 includes a hollow square pipe body and a hollow round pipe body, and the square pipe body and the round pipe body are both provided with cavities. The round pipe body and the square pipe body can be assembled together through welding, and in the concrete assembling process, a circle of black glue needs to be smeared at the joint of the round pipe body and the square pipe body to be cured for ensuring the structural strength of the optical module.

The round pipe body is fixed on the outer side wall of the square pipe body, the axis of the round pipe body is perpendicular to the outer side wall of the square pipe body, and the round pipe body is communicated with the square pipe body. The round tube body is connected with the light emitting device 401 in a nested mode, the light emitting device 401 is installed in the round tube body, and the size of the round tube body can be used for adjusting the distance between the light emitting device 401 and the optical fiber inserting core 4051 to meet the requirement of the focal length of the convergent light.

Fig. 8 is a first schematic cross-sectional structure diagram of an optical transceiver module according to an embodiment of the present disclosure; fig. 9 is a schematic cross-sectional structure diagram of an optical transceiver module according to an embodiment of the present application. A light through hole 4025 is arranged between the first insertion hole 40211 and the first optical filter 407 of the tube, the light through hole is communicated with the first insertion hole 40211, an optical signal emitted by the light emitting device 401 can pass through the light through hole to be transmitted to the first optical filter 407, and the optical signal is coupled to the optical fiber insertion core 4051 through the first optical filter 407 and the first optical filter 408.

The light through hole provided by this example may adopt a tapered structure, that is, one end of the light through hole close to the light emitting device 401 is provided with a light inlet, and the light through hole is communicated with the first jack 40211 through the light inlet; one end of the light through hole close to the first optical filter 407 is provided with a light outlet, and the size of the light inlet is larger than that of the light outlet. From the light inlet to the light outlet, the cross-sectional area of the inner wall of the light through hole is gradually reduced, so that the light through hole has a structure with one large end and one small end. In order to avoid the loss of the convergent light beam emitted by the light emitting device 401 in the light through hole, the central axis on the light emitting surface of the light through hole is overlapped with the central axis of the optical signal emitted by the light emitting device, so that the convergent light beam is ensured to smoothly pass through the light transmitting hole and enter the optical fiber.

The light emitted by the laser is divergent light, and is converged after passing through the lens 4011, the light spot of the convergent light beam is gradually changed into a small light spot from a large light spot, the light inlet of the light through hole is larger than the light outlet, the light inlet can contain the light beam of the large light spot to enter, and the small light spot is emitted from the light outlet. In the process of size transition from the light inlet to the light outlet, the light spot of the convergent light beam also gradually becomes smaller, the shape of the convergent light beam is the same as the shape of the inner contour of the inner cavity of the light through hole, so that most of the light waves converged by the lens 4011 can pass through the light through hole, and no loss is generated to the light.

Fig. 8 and 9 are cross-sectional views of the optical transceiver module at different angles, and as shown in fig. 8 and 9, in order to transmit the optical signal transmitted into the tube body by the optical fiber ferrule 4051 into the first optical receiving device 403 and the second optical receiving device 404, the first optical filter 407 and the second optical filter 408 need to be disposed in the square tube body. The first optical filter 407 and the second optical filter 408 are sequentially disposed between the light emitting device 401 and the optical fiber ferrule 4051. The first filter 407 is disposed perpendicular to the third end surface 4023, and is disposed at an angle of 45 ° with the first end surface 4021. The second optical filter 408 is disposed between the first optical filter 407 and the second inserting hole 40221, and forms an included angle of 45 ° with the third end surface 4023 and the second end surface 4022, respectively, for transmitting the optical signal emitted by the light emitting device 401 and reflecting the optical signal from the optical fiber adapter 405.

Fig. 10 is a first optical path diagram of a light emitting process of the optical transceiver module according to the embodiment of the present application, and fig. 11 is a first optical path diagram of a light receiving process of the optical transceiver module in the same direction as fig. 10. As shown in fig. 10 and 11, in this embodiment, the first optical filter 407 is perpendicular to the third end surface 4023, and the direction from the optical transmitter 401 to the optical fiber ferrule 4051 is inclined, so that the optical signal from the optical fiber adapter 405 enters the second optical receiver after being reflected by the first optical filter 407. In the process that the optical signal emitted by the light emitting device 401 enters the optical fiber ferrule 4051 after being transmitted through the first optical filter 407, the signal light at different positions perpendicular to the first end face has the same incident angle and the same optical path when passing through the first optical filter 407, and the signal light at different positions parallel to the first end face has the different incident angle and the different optical path when passing through the first optical filter 407.

Fig. 12 is a second optical path diagram of a light emitting process of the optical transceiver module according to the embodiment of the present application, and fig. 13 is a second optical path diagram of a light receiving process of the optical transceiver module in the same direction as fig. 12. Referring to fig. 12 and 13, in this embodiment, the second optical filter 408 is perpendicular to the fourth end surface 4024, the direction from the optical transmitter 401 to the optical fiber stub 4051 is inclined, and the optical signal from the optical fiber adapter 405 enters the first optical receiver after being reflected by the second optical filter 408. In the process that the optical signal emitted by the light emitting device 401 enters the optical fiber ferrule 4051 after being transmitted through the second optical filter 408, the signal light at different positions perpendicular to the first end face has different incident angles and different optical paths when passing through the second optical filter 408, and the signal light at different positions parallel to the first end face has the same incident angle and the same optical path when passing through the second optical filter 408.

The optical module that this application embodiment provided is provided with first jack and second jack respectively at the relative both ends face of body, and its third terminal surface is provided with the third jack, and the fourth terminal surface is provided with the fourth jack, the third terminal surface with the fourth terminal surface does the adjacent both ends face of body. And the light emitting device is inserted in the first jack, is electrically connected with the circuit board and is used for emitting a light signal. And the optical fiber adapter is inserted in the second jack and used for receiving the optical signal emitted by the light emitting device. And the first optical filter is arranged between the first jack and the second jack, is perpendicular to the third end surface, has an included angle of 45 degrees with the first end surface, and is used for transmitting the optical signal emitted by the light emitting device and reflecting the optical signal from the optical fiber adapter. And the second optical filter is arranged between the first optical filter and the second jack, forms an included angle of 45 degrees with the third end surface and the second end surface respectively, and is used for transmitting the optical signal emitted by the light emitting device and reflecting the optical signal from the optical fiber adapter. And the first light receiving device is inserted in the third jack, is electrically connected with the circuit board and is used for receiving the light signal reflected by the second optical filter. And the second light receiving device is inserted in the fourth jack, is electrically connected with the circuit board and is used for receiving the light signal reflected by the first optical filter. The signal light emitted by the light emitting device sequentially passes through the first optical filter and the second optical filter to enter the light adapter. In the process, signal light at different positions vertical to the first end face passes through the first optical filter, the incident angles and the optical paths are the same, and the incident angles and the optical paths are different when the signal light passes through the second optical filter; the signal light parallel to the first end face and in different positions has different incident angles and different optical paths when passing through the first optical filter and has the same incident angle and the same optical path when passing through the second optical filter, so that the first optical filter and the second optical filter have the same influence on the signal light, the generated aberration is the same, astigmatism is avoided, and the coupling efficiency is improved. Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.

It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

The above-described embodiments of the present application do not limit the scope of the present application.

Claims

1. A light module, comprising: a circuit board;

wherein the optical transceiver component comprises:

the device comprises a pipe body, a first jack and a second jack are respectively arranged on two opposite end faces of the pipe body, a third jack is arranged on a third end face of the pipe body, a fourth jack is arranged on a fourth end face of the pipe body, and the third end face and the fourth end face are arranged on two adjacent end faces of the pipe body;

2. The optical module of claim 1, wherein the first filter and the second filter are the same thickness.

3. The optical module of claim 2, wherein the first filter and the second filter are both 0.2mm thick.

4. The optical module according to claim 1, wherein a light through hole is provided between the first jack and the second jack, and the light through hole communicates with the first jack.

5. The optical module of claim 1, wherein the fiber optic adapter includes a fiber stub disposed within the second receptacle for receiving the optical signal emitted by the optical transmitter.

6. The optical module according to claim 5, wherein the end surface of the fiber stub is an inclined end surface, and the inclined end surface is inclined upward in a direction of the second receptacle from the second filter so that an incident optical path of the end surface of the fiber stub is different from a reflected optical path.

7. The optical module according to claim 1, wherein a light passing hole is disposed between the first jack and the first optical filter, and a light inlet is disposed at an end of the light passing hole close to the first jack, and the light passing hole is communicated with the first jack through the light inlet; one end of the light through hole, which is close to the first optical filter, is provided with a light outlet, and the size of the light inlet of the light through hole is larger than that of the light outlet.

8. The light module of claim 7, wherein a central axis of the light passing hole coincides with a central axis of the light signal emitted by the light emitting device.

9. The optical module of claim 5, wherein the optical transceiver module further comprises an adjustment ring disposed between the tube and the fiber optic adapter for adjusting a distance between the optical transmitter and the fiber stub.