CN110727064A

CN110727064A - Optical module

Info

Publication number: CN110727064A
Application number: CN201911053059.6A
Authority: CN
Inventors: 蔚永军; 张晓廓; 张海祥
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-01-24
Anticipated expiration: 2039-10-31
Also published as: WO2021082553A1; CN110727064B

Abstract

The application provides an optical module, optical transceiver module in this optical module includes round square body, isolator, regulation adapting unit and light emitter, wherein, adjusts the internal one end of adapting unit embedding round square pipe and is connected with the isolator, arranges in the external one end of round square pipe rotates and cup joints the light emitter. Therefore, the connecting part is adjusted through rotating outside the round square tube body, the isolator in the round square tube body can also rotate along with the adjusting connecting part, and further the adjustment of the coupling power of the light emitter and the isolator can be realized through adjusting the included angle between the polarization direction of the laser emitted by the light emitter and the polarization direction of the isolator, and finally the control of the output light power of the optical module can be realized. In addition, the relative position between the optical transmitter and the optical fiber adapter does not need to be changed, and the optical fiber adapter is directly fixed during packaging, so that the packaging process can be simplified, and the stability of the output optical power of the optical module can be ensured.

Description

Optical module

Technical Field

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

Background

An optical transceiver module, called optical module for short, is a standard module in the field of optical communication. A standard optical module generally includes an tosa, an rosa, a microprocessor, etc., and in some optical modules, the tosa and the rosa are packaged together in a metal housing to form a bi-directional optical sub-module, which is also called an rosa.

The tosa (or the tosa) mainly includes a light emitter, and in addition, in order to isolate reflected light in a light path, an isolator is usually disposed on a light emitting side of the light emitter. In the process of assembling the optical module, the isolator has a machining tolerance, so that after the isolator is assembled in a passive mode, a relatively large angle deviation exists between the actual offset direction of the isolator and the light-emitting polarization direction of the light emitter, generally between 10 and 15 degrees, the coupling efficiency is further influenced, and the lower limit requirement of the output light power of the optical module cannot be met easily; in addition, for some products with optical power upper limit requirements, if the power after the optical transmitter and the isolator are coupled exceeds the output optical power upper limit of the optical module, the optical power output by the optical module is reduced by changing the relative position between the optical transmitter and the light-emitting optical fiber, but this method may cause the problem that the output optical power of the optical module is easy to drop, and the like, and affects the data communication quality.

Disclosure of Invention

The embodiment of the application provides an optical module to provide a technical scheme for regulating and controlling output optical power.

The embodiment of the application provides an optical module, it mainly includes:

a circuit board having circuitry for providing electrical connections;

the optical transceiving secondary module is connected with the circuit of the circuit board and used for transmitting data optical signals and receiving the data optical signals;

the optical transceiver sub-assembly includes:

the surface of the round and square pipe body is provided with a first pipe orifice and a third pipe orifice which are used for bearing and adjusting the connecting component and the optical receiver;

the optical receiver extends into the third pipe orifice and is used for receiving the data optical signal;

one end of the adjusting connecting component extends into the first pipe orifice, one end of the adjusting connecting component extending into the first pipe orifice is provided with an isolator, the other end of the adjusting connecting component is arranged outside the round and square pipe body, and one end of the adjusting connecting component arranged outside the round and square pipe body is provided with a light emitter;

the light emitter is used for emitting emergent light with a polarization direction, and the emergent light passes through the isolator;

the rotation of the adjusting connecting part can drive the isolator to rotate along with the isolator, so that the included angle between the polarization direction of the isolator and the polarization direction of the emergent light is changed.

According to the optical module provided by the embodiment of the invention, as the end of the adjusting connecting part, which extends into the round-square tube, is connected with the isolator, and the end, which is arranged outside the round-square tube, is connected with the optical transmitter, when the optical module is packaged, the adjusting connecting part is fixedly connected with the isolator and rotatably connected with the optical transmitter, and the adjusting connecting part is rotated outside the round-square tube, the isolator in the round-square tube can rotate along with the adjusting connecting part and the optical transmitter is fixed, so that the included angle between the polarization direction of laser emitted by the optical transmitter and the polarization direction of the isolator can be adjusted, and the coupling power of the optical transmitter and the isolator can be adjusted, and the output optical power of the optical module can be adjusted.

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 any creative effort.

Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal;

FIG. 2 is a schematic diagram of an optical network unit;

fig. 3 is a schematic structural diagram of an optical module provided in this embodiment;

fig. 4 is an exploded schematic structural diagram of an optical module provided in this embodiment;

fig. 5 is a schematic structural diagram of an optical transceiver sub-assembly provided in this embodiment;

fig. 6 is a first schematic exploded view of an optical transceiver sub-assembly provided in this embodiment;

fig. 7 is a schematic diagram illustrating an exploded structure of an optical transceiver sub-assembly according to the present embodiment;

FIG. 8 is a schematic diagram illustrating the effect of the rotary isolator on the coupled power control provided in the present embodiment;

fig. 9 is a schematic diagram of a light receiving and emitting path of an optical transceiver sub-assembly provided in this embodiment;

fig. 10 is a third schematic exploded view of an optical sub-assembly in this embodiment;

fig. 11 is a fourth schematic view illustrating an exploded structure of an optical sub-assembly in this embodiment;

FIG. 12 is a first schematic cross-sectional view of the adjustment sleeve sub-assembly provided in this embodiment;

fig. 13 is a schematic diagram illustrating an exploded structure of an optical transceiver sub-assembly in the present embodiment;

FIG. 14 is a schematic view of the three exploded views of the adjustment sleeve sub-assembly, the protector sub-assembly and the isolator provided in this embodiment;

fig. 15 is a schematic cross-sectional view illustrating an adjusting sleeve sub-assembly and a protection sub-assembly of the optical sub-assembly of the present embodiment;

FIG. 16 is a second cross-sectional view of the adjustment sleeve sub-assembly of the present embodiment;

fig. 17 is an exploded view of the adjusting sleeve sub-assembly, the protection sub-assembly and the circular tube in this embodiment.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of 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 invention.

One of the core elements of fiber optic communications is the conversion of optical to electrical signals. The optical fiber communication uses the optical signal carrying information to transmit in the optical fiber/optical waveguide, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of the light in the optical fiber. The information processing devices such as computers use electrical signals, which require the interconversion between electrical signals and optical signals during the signal transmission process.

The optical module realizes the photoelectric conversion function in the technical field of optical fiber communication, and the interconversion of optical signals and electric 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 a circuit board, main electrical connections comprise power supply, I2C signals, data signal transmission, grounding and the like, the electrical connection mode realized by the golden finger becomes a standard mode of the optical module industry, and on the basis, the circuit board is a necessary technical characteristic in most optical modules.

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 an optical network unit 100, an optical module 200, an optical fiber 101, and a network cable 103;

one end of the optical fiber is connected with the far-end server, one end of the network cable is connected with the 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 and the network cable; and the connection between the optical fiber and the network cable is completed by an optical network unit with an optical module.

An optical port of the optical module 200 is connected with the optical fiber 101 and establishes bidirectional optical signal connection with the optical fiber; the electrical port of the optical module 200 is accessed into the optical network unit 100, and establishes bidirectional electrical signal connection with the optical network unit; the optical module realizes the mutual conversion of optical signals and electric signals, thereby realizing the connection between the optical fiber and the optical network unit; 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 unit 100, and the electrical signal from the optical network unit 100 is converted into an optical signal by the optical module and input to the optical fiber. The optical module 200 is a tool for realizing the mutual conversion of the photoelectric signals, and has no function of processing data, and information is not changed in the photoelectric conversion process.

The optical network unit is provided with an optical module interface 102, which is used for accessing an optical module and establishing bidirectional electric signal connection with the optical module; the optical network unit is provided with a network cable interface 104 for accessing a network cable and establishing bidirectional electric signal connection with the network cable; the optical module is connected with the network cable through the optical network unit, specifically, the optical network unit 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 unit is used as an upper computer of the optical module to monitor the work 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 unit and the network cable.

Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network unit 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 unit structure. As shown in fig. 2, the optical network unit 100 includes a circuit board 105, and a cage 106 is disposed on a surface of the 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 fin-like engagement structure that increases a heat radiation area.

The optical module 200 is inserted into an optical network unit, specifically, an electrical port of the optical module is inserted into an electrical connector in the cage 106, and an optical port of the optical module is connected with the optical fiber 101.

The cage 106 is positioned on the circuit board, enclosing the electrical connectors on the circuit board in the cage; the optical module is inserted into the cage, the cage fixes the optical module, and heat generated by the optical module is conducted to the cage through the optical module housing and finally diffused through the heat sink 107 on the cage.

Fig. 3 is a schematic structural diagram of an optical module 200 according to an embodiment of the present disclosure, and fig. 4 is an exploded structural diagram of the optical module 200 according to an embodiment of the present disclosure. As shown in fig. 3 and 4, an optical module 200 provided in an embodiment of the present application includes an upper housing 201, a lower housing 202, an unlocking handle 203, a circuit board 204, and an optical transceiver sub-module 205.

The upper shell 201 and the lower shell 202 form a wrapping cavity with two openings, specifically, two ends of the wrapping cavity are opened (206, 207) in the same direction, or two openings in different directions are opened; one of the openings is an electrical port 206 for inserting into an upper computer such as an optical network unit, the other opening is an optical port 207 for accessing an external optical fiber to connect an internal optical fiber, and the photoelectric devices such as the circuit board 204 are positioned in the packaging cavity.

The upper shell 201 and the lower shell 202 are generally made of metal materials, which is beneficial to realizing electromagnetic shielding and heat dissipation; the assembly mode that upper housing 201 and lower housing 202 combine is adopted, be convenient for install devices such as circuit board 204 in the casing, generally can not make the casing of optical module into an organic whole structure, like this when devices such as assembly circuit board, locating component, heat dissipation and electromagnetic shield structure can't install, also do not do benefit to production automation yet.

The unlocking handle 203 is positioned on the outer wall of the packaging cavity/lower shell 202, and the tail end of the unlocking handle is pulled to enable the unlocking handle to move relatively on the surface of the outer wall; when the optical module is inserted into the host computer, the optical module is fixed in the cage of the host computer by the unlocking handle 203, and the optical module can be pulled out from the cage of the host computer by pulling the unlocking handle 203 to release the engagement relation between the optical module and the host computer.

The optical transceiver sub-assembly 205 is used for transmitting and receiving laser light, so as to realize the optical module 200 to transmit and receive optical signals. Fig. 5 is a schematic structural diagram of an optical transceiver sub-assembly provided in this embodiment, fig. 6 is a schematic structural diagram of an optical transceiver sub-assembly provided in this embodiment, and fig. 7 is a schematic structural diagram of an optical transceiver sub-assembly provided in this embodiment. As shown in fig. 5 to 7, the rosa 205 mainly includes an optical transmitter 301, a round tube 302, an optical fiber adapter 303, an optical receiver 304, an adjusting connection component 305, and an isolator 306.

The round and square tube 302 is used for carrying a fixed light emitter 301, a fiber adapter 303 and a light receiver 304. In this embodiment, the round tube 302 is generally made of a metal material, so as to facilitate electromagnetic shielding and heat dissipation. The round and square tube body 302 is provided with a first nozzle 3021 for fixing the optical transmitter 301, a second nozzle 3022 for fixing the optical fiber adapter 303, and a third nozzle 3023 for fixing the optical receiver 304. In order to reduce the interference of the light receiving and emitting paths and reduce the volume of the device, in this embodiment, the first nozzle 3021 and the second nozzle 3022 are respectively disposed on two opposite side walls of the round and square tube body 302, and the second nozzle 3022 and the third nozzle 3023 are disposed on adjacent side walls of the round and square tube body 302.

As shown in fig. 6 and 7, the round and square tube 302 is a hollow cavity, and a filter reflector 307 and a filter 308 are disposed in the hollow cavity. The filter reflection sheet 307 is arranged among the transmitter 301, the optical fiber adapter 303 and the optical receiver 304, and is used for enabling light received by the optical fiber adapter 303 to enter the optical receiver 304 and reducing optical path interference between the optical transmitter 301 and the optical receiver 304; the filtering reflection sheet 307 may be a 45 ° filtering reflection sheet, and when installed and used, the 45 ° filtering reflection sheet is installed at an angle of 45 ° or close to 45 ° with the laser beam emitted by the light emitter 301. The filter 308 is disposed on the light incident side of the light receiver 304 to isolate stray light entering the light receiver 304.

By using the filter reflector 307 and the filter 308, when the optical module receives the data optical signal, the data optical signal to be received is transmitted to the optical fiber adapter 303 through the optical fiber, then is reflected to the filter 308 through the filter reflector 307, is filtered through the filter 308, filters stray light in the optical beam entering the optical receiver 304, and then is emitted to the optical receiver 304; when the optical module sends out a data optical signal, the optical transmitter 301 may send out a laser beam through an LD chip inside the optical transmitter, and the laser beam enters the optical fiber adapter 303 after being transmitted by the filter reflection sheet 307, and then enters an optical fiber connected to the optical fiber adapter 303.

The optical transmitter 301 is for transmitting a data optical signal. As shown in fig. 6 and 7, the present embodiment is designed as a Tx TOCAN (coaxial package emitter) composed of three parts, i.e., a pin, a socket for carrying various devices such as a laser chip, a backlight detector, etc., and a cap, i.e., the cap is fastened to the socket to protect the devices, and the pin is connected to the devices mounted on the socket through the socket. After the light emitter 301 is assembled with the adjusting connection part 305, the cap portion thereof is embedded in the adjusting connection part 305, and the stem and the pin are disposed outside the adjusting connection part 305.

The adjusting connecting member 305 may be made of a metal material to facilitate welding with the light emitter 301 and the circular tube 302 and facilitate heat dissipation of the device. The adjusting link 305 extends into the first port 3021 of the round and square tubular body 302 and has a portion disposed outside the round and square tubular body 302. The part of the adjusting connecting part 305 disposed outside the round and square tube 302 is rotatably sleeved on the cap of the light emitter 301, and in addition, an isolator 306 is fixedly disposed at one end of the adjusting connecting part 305 disposed inside the round and square tube 302. In this embodiment, an isolator 306 accommodating area is disposed at one end of the adjusting connecting part 305 disposed in the round and square tube 302, and the isolator 306 is disposed in the adjusting connecting part 305, as shown in fig. 6, which is a schematic diagram of the isolator 306 and the adjusting connecting part 305 after being assembled, and fig. 7 is a schematic diagram of the isolator 306 and the adjusting connecting part 305 after being disassembled; of course, the spacer 306 may be directly fixed to the end of the adjusting connection member 305 disposed in the round and square tubular body 302 by other means.

The spacer 306 is disposed in the cavity of the circular-square tube body 302 and is fixed to the adjustment connection member 305. The isolator 306 in this embodiment is based on the polarization principle of passing light, allowing light to pass only in a single direction. Generally, the isolator mainly includes two polarizers and a magnetic ring, and the polarizers are disposed on the front and rear sides of the magnetic ring. The polarization direction of the incident light is consistent with that of the first polarizer (also called polarizer), namely, the incident direction of the isolator, then the polarization plane of the incident light is rotated by 45 degrees after passing through the magnetic ring, and the polarization plane is just consistent with the direction of the transmission axis of the second polarizer (also called analyzer), so that all optical signals pass through the second polarizer. The reflected light caused by the light path enters the second polarizer to become linearly polarized light with an included angle of 45 degrees with the direction of the transmission axis of the first polarizer, the polarization direction continues to rotate by 45 degrees after passing through the magnetic ring, the included angle between the polarization plane and the transmission axis of the first polarizer is 90 degrees, and the polarization direction of the light is perpendicular to the direction of the first polarizer, so that the light cannot pass through the polarizers, and the reverse isolation effect is achieved. Based on the above-described operation principle of the isolator 306, the polarization direction of the first polarizer in the isolator 306 is referred to as the polarization direction of the isolator 306 in this embodiment.

By the above-mentioned structural design of the light emitter 301, the adjusting connection member 305, the isolator 306 and the round and square tube 302, when the optical module is packaged, the adjusting connection member 305 is rotated outside the round and square tube 302, the isolator 306 inside the round and square tube 302 also rotates along with the adjusting connection member 305, and at the same time, since the light emitter 301 and the adjusting connection member 305 are rotatably sleeved, the light emitter 301 does not rotate along with the adjusting connection member 305. Further, by rotating the adjusting connection member 305, an angle between the polarization direction of the laser emitted by the light emitter 301 and the polarization direction of the isolator 306 can be adjusted, wherein the angle between the polarization direction of the laser emitted by the light emitter 301 and the polarization direction of the isolator 306 can be any value between 0 ° and 180 °. Based on the working principle of the isolator 306, the adjustment of the coupling power of the optical transmitter 301 and the isolator 306 is realized by adjusting the included angle between the polarization direction of the laser emitted by the optical transmitter 301 and the polarization direction of the isolator 306, so that the control of the output optical power of the optical module can be realized.

Fig. 8 is a schematic diagram illustrating the effect of the rotary isolator on the coupled power control provided in this embodiment. As shown in fig. 9, when the included angle between the polarization direction of the isolator 306 and the polarization direction of the laser emitted by the light emitter 301 is 0 °, the percentage of light passing through the laser emitted by the light emitter 301 is 100%, and the percentage of light passing through the laser gradually decreases as the included angle between the two increases, wherein when the included angle between the two is 90 °, the percentage of light passing through the laser is 0; then, the adjusting connection member 305 is rotated continuously to increase the angle between the polarization direction of the isolator 306 and the polarization direction of the laser emitted by the light emitter 301, so that the light transmission percentage is gradually increased until the angle between the polarization direction of the isolator 306 and the polarization direction of the laser is 180 °, and the light transmission percentage is recovered to 100%.

Therefore, for a product with a lower power limit requirement, when the preliminary coupling power of the optical transmitter and the isolator is lower than the target lower power limit, the adjusting connecting component 305 is rotated to adjust the bias direction of the isolator 306, so as to reduce the included angle between the polarization direction of the isolator 306 and the polarization direction of the laser emitted by the optical transmitter 301, and further increase the coupling power of the optical transmitter 301 and the isolator 306; for a product with a power upper limit requirement, when the preliminary coupling power of the optical transmitter and the isolator is higher than the target upper limit power, the adjusting connection component 305 is rotated to adjust the bias direction of the isolator 306, so as to increase the included angle between the polarization direction of the isolator 306 and the polarization direction of the laser emitted by the optical transmitter 301, and further reduce the coupling power of the optical transmitter 301 and the isolator 306.

Based on the above solution, in the present embodiment, the optical module can adjust the light output power without changing the relative position between the optical transmitter 301 and the optical fiber adapter 303, so that when the module is packaged, the optical fiber adapter 303 may be directly fixed, and preferably, the laser beam emitted by the optical transmitter 301 is designed to be coaxial with the optical fiber adapter 303. Therefore, the optical module provided by the embodiment can simplify the packaging process and can ensure the stability of the output optical power of the optical module.

In addition, in consideration of the stability of the working performance of the optical module after leaving the factory, in this embodiment, after the optical module completes optical power coupling, the adjusting connection part 305 may be welded on the circular-square tube 302, and the optical transmitter 301 may be welded on the adjusting connection part 305, wherein, to ensure the welding firmness and the heat dissipation effect of the optical transmitter 301, the welding between the above devices may be implemented by using a metal solder, so as to realize that the optical transmitter 301 can dissipate heat through the circular-square tube 302. Of course, other fixing methods, such as gluing, may be adopted as long as the light emitter 301 and the adjusting and connecting part 305 and the circular and square tube 302 can be fixed.

Further, the optical receiver 304 is used for receiving the data electrical signal. Similarly, the present embodiment is also designed as an Rx TOCAN (coaxial package receiver) composed of three parts, i.e., a pin, a socket and a cap, wherein the socket is used for carrying various devices, the cap is fastened on the socket to protect the devices, and the pin is connected with the devices arranged on the socket through the socket. After the optical receiver 304 is assembled with the round and square tube body 302, the cap portion of the optical receiver extends into the third nozzle 3023, and the tube seat and the pins are disposed outside the round and square tube body 302.

The optical fiber adapter 303 is provided with an optical fiber ferrule 3031 for passing through an optical fiber, and in order to ensure that an optical device has a certain return loss value, an optical coupling end face of the optical fiber ferrule 3031 placed in the round and square tube body 302 is generally processed into an inclined plane with a certain angle. After the optical fiber adapter 303 is assembled on the round and square tube body 302, part of the tube seat and the optical fiber inserting core 3031 are arranged in the tube cavity of the round and square tube body 302, and the rest part of the tube seat is arranged outside the round and square tube body 302.

Fig. 9 is a schematic diagram of a light receiving and emitting path of an optical transceiver sub-assembly provided in this embodiment. As shown in fig. 9, in the assembly manner of the optical transmitter 301, the optical fiber adapter 303, the optical receiver 304 and the round and square tube 302, the optical transmitter 301 and the optical receiver 304 respectively establish optical connection with the optical fiber adapter 303 by using optical elements, such as an isolator 306, a filter reflector 307 and a filter 308, which are disposed on the round and square tube 302, and both the light emitted and the received light in the optical transceiver sub-module are transmitted through the same optical fiber in the optical fiber adapter 303, that is, the same optical fiber in the optical fiber adapter 303 is a transmission channel for the light entering and exiting from the optical transceiver sub-module, and the optical transceiver sub-module implements a single-fiber bidirectional optical transmission mode.

Fig. 10 is a third schematic diagram illustrating an exploded structure of an optical sub-assembly for transceiving provided in this embodiment, and fig. 11 is a fourth schematic diagram illustrating an exploded structure of an optical sub-assembly for transceiving provided in this embodiment. As shown in fig. 10 and 11, the adjusting link 305 in this embodiment is composed of a welding sub-member 3051, an adjusting sleeve sub-member 3052, and a protective sub-member 3053. Of course, the adjustment sleeve sub-assembly 3052 and the guard sub-assembly 3053 can also be of unitary construction, and can be collectively referred to as an adjustment sub-assembly.

The solder subassembly 3051 can be formed from a metallic material to facilitate soldering between devices and heat dissipation from the devices. In this embodiment, the welding sub-assembly 3051 is designed as a hollow cylindrical structure, and is sleeved on the light emitter 301, and in addition, in order to ensure the connection firmness of the welding sub-assembly 3051 and the light emitter 301, the two may be in an interference fit, that is, the outer diameter of the light emitter 301 is slightly larger than the inner diameter of the welding sub-assembly 3051. With the welding sub-assembly 3051 mated, the adjusting sleeve sub-assembly 3052 has a light emitter receiving cavity, the welding sub-assembly 3051 is rotatably inserted into the light emitter receiving cavity, and at the same time, the cap of the light emitter 301 is inserted into the welding sub-assembly 3051 and the socket is disposed outside the welding sub-assembly 3051. After the power coupling of the optical module is completed, the welding sub-assembly 3051 and the adjusting sleeve sub-assembly 3052 can be fixed together by solder, glue, or the like.

In this embodiment, the welding sub-assembly 3051 is further sleeved on the exterior of the light emitter 301, so that the damage to the cap of the light emitter 301 when the light emitter 301 is welded on the adjustment sleeve sub-assembly 3052 can be prevented, and the requirement of airtightness inside the light emitter 301 is ensured.

Further, considering that the thermal expansion may affect the distance between the devices during the use of the optical module, as shown in fig. 11, the cap of the light emitter 301 is disposed to protrude from the welding sub-component 3051, and similarly, the adjusting sleeve sub-component is also designed accordingly.

FIG. 12 is a first cross-sectional view of the adjustment sleeve sub-assembly of this embodiment. As shown in fig. 12, the light emitter receiving cavity of the adjusting sleeve sub-member 3052 is designed to be composed of a first receiving area 521a and a second receiving area 521b, which are matched with the assembled shapes of the light emitter 301 and the welding sub-member 3051, wherein the inner diameter of the first receiving area 521a is designed to be larger than that of the second receiving area 521b, so as to facilitate the positioning of the mounting position of the light emitter 301 during assembly.

Fig. 13 is a schematic diagram illustrating an exploded structure of an optical transceiver sub-assembly in this embodiment. As shown in fig. 13, after the light emitter 301 and the welding sub-assembly 3051 are assembled with the adjustment sleeve sub-assembly 3052, there is a certain gap between the end of the welding sub-assembly 3051 and the bottom of the first accommodation region 521a, and there is a certain gap between the cap end of the light emitter 301 and the bottom of the second accommodation region 521 b. Through the design, on one hand, a certain gap is reserved for the thermal expansion of the light emitter 301 in the use process of the optical module; on the other hand, the optical transmitter 301 may have a certain moving space in the axial direction, thereby facilitating the coupling between the optical transmitter and the fiber adapter 303.

Fig. 14 is an exploded view of the adjusting sleeve sub-assembly, the protection sub-assembly and the isolator, and fig. 15 is a cross-sectional view of the adjusting sleeve sub-assembly and the protection sub-assembly of the rosa module. As shown in fig. 14 to 15, the protective subassembly 3053 is designed as a hollow structure to place the spacer 306.

The outer circumference cross section of protection sub-part 3053 designs circular structure, compares with square structure, can guarantee its logical light bore's size, when it rotates along with adjusting sleeve sub-part 3052, can occupy less interior space of circle square body 302.

Further, in the protection sub-member 3053, a clamping portion 531 is provided at one end for connecting with the adjusting sleeve sub-member 3052; with the shape assorted of this joint portion 531, adjust the block portion 523 that sets up on the sleeve part 3052, like this, protection subcomponent 3053 alright in order to block in block portion 523 through joint portion 531, can fix both through glue etc. certainly, can also realize the fixed connection of protection subcomponent 3053 and regulation sleeve part 3052 through setting up modes such as special fixed knot structure etc. on joint portion 531 and block portion 523. Utilize above-mentioned structure, because protection subcomponent 3053 and adjusting sleeve subcomponent 3052 fixed connection, simultaneously, isolator 306 sets up inside protection subcomponent 3053, and then, when rotating adjusting sleeve subcomponent 3052, alright follow in order to drive isolator 306 and adjust sleeve subcomponent 3052 synchronous rotation.

Meanwhile, the present example provides the other end of the protective sub-member 3053 as a fully open structure matching the outer diameter of the spacer 306, so that it is possible to facilitate the placement of the spacer 306 in the protective sub-member 3053 and the removal of the spacer 306 from the protective sub-member 3053. Of course, the protective member 3053 may be provided as being composed of a plurality of detachable portions, the spacer 306 may be provided in the protective member 3053, and when it is necessary to take out the spacer 306 from the protective member 3053, the protective member 3053 may be detached directly.

In the embodiment, the adjusting sleeve sub-component 3052 and the protecting sub-component 3053 are arranged in a detachable structure, so that in the process of packaging the optical module, when the optical module needs to be returned, the protecting sub-component 3053 and the adjusting sleeve sub-component 3052 are detached, only the adjusting sleeve sub-component 3052 is replaced, the isolator 306 and the protecting sub-component 3053 do not need to be replaced, and the material cost can be saved. In addition, the opening shape of the protection sub-member 3053 is designed to facilitate the spacer 306 to be taken out of the protection sub-member 3053, and further, in the optical module packaging process, when the process needs to be repeated, if the protection sub-member 3053 needs to be replaced, the spacer 306 can be taken out of the protection sub-member 3053 without replacing the spacer 306, so that the material cost can be saved.

Fig. 16 is a schematic cross-sectional structure diagram of the sub-assembly of the adjusting sleeve according to the present embodiment. As shown in fig. 16, in the adjusting sleeve sub-member 3052, a transition region 522 is further provided between the light emitter accommodating cavity 521 and the engaging portion 523 for inserting the protection sub-member 3053, and in this embodiment, an inner diameter of the transition region 522 is smaller than an inner diameter of the light emitter accommodating cavity 521, a first isolation plate 524 is provided between the transition region 522 and the engaging portion 523, and a through hole for passing a laser beam emitted by the light emitter 301 is opened on the first isolation plate 524. The transition region 522 is provided in this embodiment, so that an optical element such as a focusing lens and/or a filter can be disposed on the light-emitting side of the light emitter 301, and compared with disposing the optical element outside the isolation sleeve 306, the volume of the whole optical subassembly can be reduced, and by disposing the inner diameter of the transition region 522 and the first isolation plate 524, the position of the optical element can be located, which facilitates the installation of the optical element; in addition, in this embodiment, the first isolation plate 524 is provided, and the first isolation plate 524 is provided with a through hole, so that the stray light entering the isolator 306 can be isolated.

Similarly, the present embodiment also designs the internal structure of the round and square tube 302. Fig. 17 is an exploded view of the adjusting sleeve sub-assembly, the protection sub-assembly and the circular tube in this embodiment. As shown in fig. 17, a transmitter accommodation area 3024 which is matched in shape to the assembled protection sub-assembly 3053 and adjustment sleeve sub-assembly 3052 and an adapter accommodation area 3026 which is matched in shape to the optical fiber adapter are provided in the round and square tube body 302, and a second spacer 3025 is provided between the transmitter accommodation area 3024 and the adapter accommodation area 3026, and a through hole for passing a laser beam emitted from the light transmitter is opened in the second spacer 3025. A portion of the adjustment sleeve sub-assembly 3052 and the isolator 306 are disposed in the transmitter receiving area 3024, and the filter reflector 307 and the fiber ferrule 3031 and a portion of the tube body of the fiber optic adapter 303 are disposed in the adapter receiving area 3026. The light beam emitted by the light emitter 301 passes through the isolator 306, the through hole on the second isolation plate 3025, and the filter reflection sheet 307 to be emitted to the optical coupling end face of the fiber ferrule 3031 of the fiber optic adapter 303, and finally enters the fiber to be emitted.

Further, in order to reduce the volume of the whole optical transceiver sub-module, and reduce the volumes of the isolator 306 and the filter reflection sheet 307, and save material cost, the embodiment sets the convergence point of the laser beam emitted by the optical transmitter 301 to be located on the light incident surface of the optical fiber ferrule 3031 on the optical fiber adapter 303, meanwhile, the filter reflection sheet 307 is arranged close to the light incident surface of the optical fiber ferrule 3031, and the isolator 306 is arranged close to the filter reflection sheet 307.

Similarly, a receiver accommodating area 3028 matching the shape of the optical receiver 304 is further provided in the round and square tube body 302, a third partition board 3027 is provided between the receiver accommodating area 3028 and the emitter accommodating area 3024 as well as between the receiver accommodating area 3026 and the adapter accommodating area 3024, and a through hole through which the laser beam reflected by the filter reflection sheet 307 passes is opened in the third partition board 3027. The cap portion of the optical receiver 304 is disposed in the emitter receiving area 3024. The light beam received by the fiber adapter 303 and reflected by the filter reflector 307 passes through the through hole of the third partition board 3027 and then is emitted to the filter 308, and after being filtered by the filter 308, is emitted to the light receiver 304.

This embodiment is through set up different and each components and parts shape assorted holding area in circle square tube body 302, compare with setting up circle square tube body 302 to a cavity structure, can conveniently hold the installation location of components and parts, in addition, with the help of the through-hole structure on division board and the division board that sets up between the different holding areas, can realize the isolation to stray light.

It should be noted that, in the above embodiment, the tosa and the rosa are packaged together in the metal casing to form the rosa, and both of them can be packaged independently in a specific practical process, that is, for the tosa, the circular tube 302 in the above embodiment is not provided with the third pipe port 3023, and meanwhile, the shape of the circular tube 302 can be designed into other shapes, such as a cylindrical shape.

All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments, and the relevant points may be referred to the part of the description of the method embodiment. It is noted that other embodiments of the present invention will become readily apparent to those skilled in the art from consideration of the specification and practice of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention 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 invention being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A light module, comprising:

a circuit board having circuitry for providing electrical connections;

the optical transceiving secondary module is electrically connected with the circuit of the circuit board and is used for transmitting data optical signals and receiving the data optical signals;

the optical transceiver sub-assembly includes:

2. The optical module of claim 1, wherein the adjusting connection component comprises an adjusting sub-component and a welding sub-component sleeved on the optical transmitter, wherein:

one end of the adjusting sub-component extends into the first pipe orifice, and the other end of the adjusting sub-component is arranged outside the round and square pipe body; the isolator is arranged at one end extending into the first pipe orifice;

the welding sub-component is embedded into the adjusting sub-component and arranged at one end outside the round and square pipe body.

3. The optical module of claim 2, wherein the adjustment sub-assembly comprises an adjustment sleeve sub-assembly and a protection sub-assembly, wherein:

one end of the adjusting sleeve sub-component extends into the first pipe orifice, one end of the adjusting sleeve sub-component extending into the first pipe orifice is connected with the protective sub-component, the other end of the adjusting sleeve sub-component is arranged outside the round and square pipe body, and one end of the adjusting sleeve sub-component arranged outside the round and square pipe body is sleeved on the welding sub-component;

the insulator is arranged inside the protection sub-component.

4. The optical module of claim 3, wherein at an end connected to the protective sub-component, the adjustment sleeve sub-component is provided with a snap-fit portion; the protection sub-component is provided with a clamping portion matched with the clamping portion, and the clamping portion is clamped in the clamping portion.

5. The optical module of claim 3, wherein a cap of the optical transmitter is disposed proud of the solder sub-assembly, wherein:

the adjusting sleeve sub-component is provided with a light emitter accommodating cavity used for accommodating the light emitter and the welding sub-component, and the assembling shapes of the light emitter and the welding sub-component are matched;

the light emitter accommodating cavity consists of a first accommodating area and a second accommodating area;

the inner diameter of the first containing area is larger than that of the second containing area;

a gap is provided between the end of the weld subassembly and the bottom of the first receiving area and a gap is provided between the end of the cap and the bottom of the second receiving area.

6. The light module of claim 5, further comprising a transition zone in said adjustment sleeve sub-assembly, wherein:

the transition area is positioned between the light emitter accommodating cavity and a clamping part for arranging the isolator;

the inner diameter of the transition area is smaller than that of the light emitter accommodating cavity;

the transition area with be equipped with first division board between the block portion, offer on the first division board and be used for supplying the through-hole that the transmission light passes through.

7. The optical module of claim 1, wherein the optical sub-transceiver module further comprises a fiber optic adapter, wherein:

the round and square tube body is also provided with a second tube opening, and the optical fiber adapter extends into the second tube opening;

the optical fiber adapter is internally provided with an optical fiber inserting core, and a convergence point of emitted light emitted by the light emitter is positioned on the light incident surface of the optical fiber inserting core;

the isolator is close to the light incident surface of the optical fiber inserting core.

8. The optical module according to claim 7, wherein a transmitter receiving area matching the shape of the assembled isolator and adjusting connection member, and an adapter receiving area matching the shape of the optical fiber adapter are provided in the round-square tube, wherein:

and a second isolation plate is arranged between the emitter accommodating area and the adapter accommodating area, and a through hole for the emitted light to pass through is formed in the second isolation plate.

9. The optical module of claim 8, wherein a receiver receiving area matching the shape of the optical receiver is provided in the round-square tube, wherein:

and a third isolation plate is arranged between the receiver accommodating area and the emitter accommodating area as well as between the receiver accommodating area and the adapter accommodating area, and a through hole for the light beam received by the light receiver to pass through is formed in the third isolation plate.

10. The light module of claim 7 or 8, further comprising a filter reflector and a filter, wherein:

the light beam received by the optical fiber adapter is reflected to the filter plate by the filter reflection plate;

the light beam reflected by the filtering reflector is filtered by the filter and then emitted to the light receiver;

emergent light emitted by the light emitter sequentially penetrates through the isolator and the filtering reflection sheet and then is emitted to the optical fiber adapter.