CN112230347B

CN112230347B - Optical module

Info

Publication number: CN112230347B
Application number: CN202011146174.0A
Authority: CN
Inventors: 刘旭霞; 邵乾; 杨思更; 何鹏; 罗成双; 崔伟; 王凤来
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2022-04-19
Anticipated expiration: 2040-10-23
Also published as: CN112230347A

Abstract

The application provides an optical module, which comprises a circuit board; the light emitting chip is arranged on the circuit board and is electrically connected with the circuit board; the light receiving chip is arranged on the circuit board and is electrically connected with the circuit board; the lens assembly is arranged at one end of the circuit board close to the optical port of the optical module, covers the light emitting chip and the light receiving chip and is used for changing the propagation direction of the signal light emitted by the light emitting chip and the signal light to be received by the light receiving chip; the jack catch component is arranged at an optical port of the optical module, one end of the jack catch component is connected with the lens component, and the other end of the jack catch component is used for connecting an external optical fiber; the lens assembly comprises a lens assembly body and a lens assembly connecting part; the lens component body covers the light emitting chip and the light receiving chip, and the connecting part of the lens component is connected with the jaw component; the lens component connecting part is provided with a positioning pin which is used for positioning the external optical fiber connector. The application provides an optical module, inside optical signal's transmission does not need the optic fibre area, saves space, the optical module further development of being convenient for to a certain extent.

Description

Optical module

Technical Field

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

Background

With the development of new services and application modes such as cloud computing, mobile internet, video and the like, the development and progress of the optical communication technology become increasingly important. In the optical communication technology, an optical module is a tool for realizing the interconversion of optical signals and is one of key devices in optical communication equipment, and the transmission rate of the optical module is continuously increased along with the development requirement of the optical communication technology.

In some optical modules with cob (chip On board) package structures, an optical fiber ribbon and a claw are arranged in the optical module to realize transmission and reception of optical signals in the optical module. Specifically, one end of the optical fiber ribbon is connected with the lens assembly through the optical fiber connector, the other end of the optical fiber ribbon is connected with the clamping jaw through the optical fiber connector, the clamping jaw is used for realizing connection of the optical fiber ribbon and external optical fibers, and then transmission of optical signals between the optical fiber ribbon and the external optical fibers is realized. However, when the optical fiber ribbon is used for transmitting optical signals in the optical module, a corresponding installation space needs to be reserved for installation of the optical fiber ribbon, and meanwhile, the problems that the reliability risk caused by damage of the optical fiber ribbon needs to be borne and the manufacturing cost of the optical module is correspondingly increased by arranging the optical fiber ribbon also need to be solved.

Disclosure of Invention

According to the optical module with the novel structure, the optical fiber ribbon is not needed in the transmission of the optical signal in the optical module, the space is saved to a certain degree, the reliability risk caused by the damage of the optical fiber ribbon is reduced, and the manufacturing cost is reduced.

The application provides an optical module, includes:

a circuit board;

the light emitting chip is arranged on the circuit board, is electrically connected with the circuit board and is used for emitting signal light;

the light receiving chip is arranged on the circuit board, is electrically connected with the circuit board and is used for receiving signal light from the outside of the optical module;

the lens assembly is arranged at one end of the circuit board close to an optical port of the optical module, covers the light emitting chip and the light receiving chip and is used for changing the propagation direction of the signal light emitted by the light emitting chip and the signal light to be received by the light receiving chip;

the jack catch component is arranged at an optical port of the optical module, one end of the jack catch component is connected with the lens component, and the other end of the jack catch component is used for connecting an external optical fiber;

wherein the lens assembly comprises a lens assembly body and a lens assembly connecting part; the lens component body is covered on the light emitting chip and the light receiving chip;

the lens assembly connecting part is connected with the jaw assembly, and the lens assembly is directly connected with an external optical fiber connector through the jaw assembly to establish optical connection;

the lens component connecting part is provided with a positioning pin, and the positioning pin is used for positioning an external optical fiber connector.

In the optical module that this application provided, light emission chip and light receiving chip set up on the circuit board, and the lens subassembly cover is established on light emission chip and light receiving chip and is set up the tip that is close to optical module light mouth at the circuit board, and the lens subassembly is used for changing the propagation direction that light emission chip transmitted signal light and light receiving chip waited to receive signal light. Further, the optical module that this application provided still includes jaw assembly, jaw assembly sets up the optical port at the optical module, one end lug connection lens subassembly, the other end is used for connecting outside fiber connector, establish lens subassembly and outside fiber connector's optical connection through jaw assembly, and then realize the direct transmission between outside optic fibre and the lens subassembly of light signal between lens subassembly and the outside optic fibre, saved the required optical fiber ribbon of light signal transmission between lens subassembly and outside fiber connector in traditional optical module, and then reduce the space that sets up the optical fiber ribbon in the optical module, reduce the reliability risk and the reduction in manufacturing cost that the optical fiber ribbon damages and bring.

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 an embodiment of the present application;

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

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

FIG. 6 is a first perspective view of a lens assembly provided in an embodiment of the present application;

FIG. 7 is a second perspective view of a lens assembly provided in an embodiment of the present application;

FIG. 8 is a cross-sectional view of a lens assembly provided in an embodiment of the present application;

FIG. 9 is a cross-sectional view of a lens assembly disposed on a circuit board according to an embodiment of the present application;

FIG. 10 is a schematic view of an assembly structure of a lens assembly and a latch assembly according to an embodiment of the present disclosure;

FIG. 11 is an exploded view of a lens assembly and a latch assembly according to an embodiment of the present disclosure;

FIG. 12 is a first cross-sectional view of a lens assembly and a jaw assembly according to an embodiment of the present disclosure;

fig. 13 is a second cross-sectional view of a lens assembly and a latch assembly according to an embodiment of the present disclosure;

fig. 14 is a cross-sectional view of an optical module according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a lower housing in an optical module according to an embodiment of the present disclosure;

fig. 16 is a schematic structural diagram of an upper housing of an optical module according to an embodiment of the present application.

Detailed Description

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 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 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 signals, 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. Further, an optical connection mode implemented by using an optical interface and an optical fiber connector has become a mainstream connection mode in the optical module industry, on this basis, the optical fiber connector also forms various industry standards, such as an LC interface, an SC interface, an MPO interface, and the like, the optical interface of the optical module also has an adaptive structural design for the optical fiber connector, and the optical fiber adapters arranged at the optical interface are of various types.

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 unit 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 remote server, one end of the network cable 103 is connected with a local information processing device, and the connection between the local information processing device and the remote 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 completed by the optical network unit 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 interconversion 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 through 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.

To this end, the remote server establishes a bidirectional signal transmission channel with the local information processing device through the optical fiber 101, the optical module 200, the optical network unit 100, and the network cable 103.

Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network unit 100 is a host computer of the optical module 200, and provides a data signal to the optical module 200 and receives a data signal from the optical module 200, and a common host computer of the optical module 200 also includes 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 convex structure such as a fin for increasing 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 200 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 200 is inserted into a cage, the optical module 200 is held by the cage, and heat generated by the optical module 200 is conducted to the cage through an optical module case and finally diffused by a 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 the 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 member 203, a circuit board 300, a lens assembly 400, a latch assembly 500, and the like.

The upper housing 201 is covered on the lower housing 202 to form a package cavity with two openings, and the outer contour of the package cavity is generally in a square shape. 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 201 comprises a cover plate, and the cover plate covers two side plates of the upper shell 201 to form a wrapping cavity; the upper casing 201 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 casing 201 on the lower casing 202.

The two openings may be two ends (204, 205) in the same direction, or two openings in different directions; one of the openings is an electrical port 204, a gold finger of the circuit board 300 extends out of the electrical port 204 and is inserted into an upper computer such as an optical network unit, the other opening is an optical port 205 used for external optical fiber access to connect an optical transceiver inside the optical module 200, and photoelectric devices such as the circuit board 300, an optical chip and the lens assembly 400 are located in the wrapping cavity.

The upper shell 201 and the lower shell 202 are combined to facilitate the installation of devices such as the circuit board 300 and the like in the shells, and the upper shell 201 and the lower shell 202 form an outermost packaging protection shell of the optical module. 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; generally, the housing of the optical module 200 is not integrated, so that when devices such as a circuit board are assembled, the positioning component, the heat dissipation structure and the electromagnetic shielding structure cannot be mounted, and the 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 structure matched with the upper computer cage; the end of the unlocking member 203 is pulled to make the unlocking member 203 relatively move 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 structure of the unlocking component 203; by pulling the unlocking member 203, the engaging structure of the unlocking member 203 moves along with the unlocking member, and further the connection relationship between the engaging structure and the upper computer is changed, so that the engaging relationship 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 a light emitting chip, a driving chip of the light emitting chip, a light receiving chip, a transimpedance amplifier chip, an amplitude limiting amplifier chip, a microprocessor chip, and the like, wherein the light emitting chip and the light receiving chip are directly attached to the circuit board of the optical module, and such a configuration is referred to as COB packaging in the industry.

The circuit board 300 connects the electrical appliances 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; while circuit board 300 also functions to carry the various components, such as the lens assembly carried by the circuit board.

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; the rigid circuit board can also be inserted into an electric connector in the upper computer cage, and particularly, a metal pin/golden finger is formed on the surface of the tail end of one side of the rigid circuit board and used for being connected with the electric connector.

Fig. 5 is a schematic view of an internal structure of an optical module according to an embodiment of the present application. In the embodiment of the present application, the lens assembly 400 is disposed at one end of the circuit board 300. Specifically, the lens assembly 400 and the circuit board 300 form a cavity for enclosing optical chips such as a light emitting chip or a light receiving chip, and the optical chips such as the light emitting chip or the light receiving chip are located in the cavity. The lens assembly is used for transmitting the light beam and changing the transmission direction of the light beam in the transmission process. In use: the light emitted by the optical chip in the light emitting chip is transmitted and reflected by the lens assembly and then enters the optical fiber; or, the light from the optical fiber is reflected by the lens assembly and enters the light receiving chip, and the lens assembly not only plays a role of sealing the optical chip, but also establishes optical connection between the optical chip and the optical fiber. The lens component covers the light emitting chip or the light receiving chip at the same time, so that the signal light emitted by the light emitting chip or the signal light from the outside of the optical module can be changed conveniently by using fewer devices. In this embodiment, the light emitting chip is covered by the lens assembly, or the light receiving chip is covered by the lens assembly, or the light emitting chip and the light receiving chip are covered by the lens assembly respectively. Further, in the embodiment of the present application, the number of the lens assemblies may be 1, 2, or the like.

In the embodiment of the present application, the lens assembly 400 is disposed above the light emitting chip and the light receiving chip in a cover-type manner; of course, in the embodiment of the present application, the lens assembly 400 may also be disposed above the light emitting chip or the light receiving chip in a cover-type manner. The number of the light emitting chips and the number of the light receiving chips may be 1 or more. Further, in this embodiment, the lens assembly 400 may be covered over an optical chip, such as a driving chip, a transimpedance amplifier chip, an amplitude limiting amplifier chip, and the like, which is related to photoelectric and photoelectric conversion functions.

In the embodiment of the present application, the lens assembly 400 is disposed at one end of the circuit board 300 close to the optical port, and may also be disposed in the middle of the circuit board 300, which may be specifically selected according to the actual needs of the optical module. As shown in fig. 5, the lens assembly 400 is disposed at one end of the circuit board 300 near the optical port and one end of the lens assembly 400 is connected to one end of the jaw assembly 500, and the other end of the jaw assembly 500 is used for connecting optical fibers. Furthermore, in the optical module provided in the embodiment of the present application, optical connection between the lens assembly 400 and the external optical fiber connector is realized through the latch assembly 500, and direct transmission of an optical signal between the lens assembly 400 and the external optical fiber is realized, that is, signal light generated by an optical chip is directly transmitted to the external optical fiber connector through the lens assembly 400, and signal light to be input to the optical module by the external optical fiber is directly transmitted to the lens assembly 400 through the external optical fiber connector in childhood, so that an optical fiber ribbon required for transmitting an optical signal between the lens assembly 400 and the external optical fiber is saved, a space used by the optical fiber ribbon in the optical module is reduced, and further development of the optical module is facilitated.

In the present embodiment, lens assembly 400 is typically formed integrally from a polymeric material using an injection molding process. Specifically, the lens assembly 400 is made of a material having a good light transmittance, such as PEI (Polyetherimide) plastic (Ultem series). Because all of the beam spreading elements in lens assembly 400 are formed from the same single sheet of polymer material, the number of molding dies and manufacturing costs and complexity can be significantly reduced.

FIG. 6 is a first perspective view of a lens assembly provided in an embodiment of the present application; fig. 7 is a second perspective view of a lens assembly provided in an embodiment of the present application, and fig. 6 and 7 show a detailed structure of the lens assembly provided in the embodiment of the present application. As shown in fig. 6 and 7, a lens assembly 400 provided by the embodiments of the present application includes a lens assembly body 410 and a lens assembly connecting part 420. Wherein: the lens assembly body 410 is used for covering the light emitting chip and the light receiving chip, and further used for changing the propagation direction of the signal light emitted by the light emitting chip and the signal light to be received by the light receiving chip; the lens assembly coupling part 420 is used to couple the jaw assembly 500 so as to facilitate optical connection of the lens assembly 400 with an external optical fiber connector.

In the embodiment of the present application, in order to change the propagation direction of the signal light emitted by the light emitting chip and the signal light to be received by the light receiving chip, a first accommodating cavity 411 is disposed at the top of the lens assembly body 410, and a second accommodating cavity 412 is disposed at the bottom of the lens assembly body 410. Further, a first reflecting surface is arranged at the bottom of the first accommodating cavity 411, and the first reflecting surface is mainly used for changing the propagation direction of the signal light emitted by the light emitting chip and the signal light to be received by the light receiving chip; the second accommodating chamber 412 is used for covering and accommodating the light emitting chip, the light receiving chip and the main chip related to the electro-optical and photoelectric conversion. Meanwhile, the second accommodating cavity 412 formed in the lens assembly body 410 facilitates uniform adjustment and control of the wall thickness ratio of the lens assembly 400, and further facilitates ensuring that the lens assembly 400 meets the precise requirements of various parameters when the lens assembly 400 is manufactured by an injection molding process. Further, in order to uniformly adjust and control the wall thickness ratio of the lens assembly 400, the side edge of the lens assembly body 410 is provided with a step, so that the uniform cooling in the injection molding process of the lens assembly 400 is further ensured, and the lens assembly 400 is further ensured to meet the accurate requirement of parameters.

In the embodiment of the present application, the second accommodating chamber 412 is provided with a first lens array 4121, and the first lens array 4121 may be formed by arranging a plurality of lens protrusions. When the lens assembly 400 is assembled on the circuit board 300, the second accommodating cavity 412 is covered on the light emitting chip and/or the light receiving chip, the projection of the first lens array 4121 in the direction of the circuit board 300 covers the light emitting chip and/or the light receiving chip, and the first lens array 4121 is used for collimating the signal light emitted by the light emitting chip and focusing the signal light to be received by the light receiving chip.

In the embodiment of the present application, in order to facilitate the coupling and positioning of the lens assembly 400 and the external optical fiber, a positioning pin 430 is disposed on the lens assembly 400; one end of the positioning pin 430 extends out of the lens assembly 400 and the other end is embedded in the lens assembly 400. Alternatively, as shown in fig. 7, the other end of the positioning pin 430 extends into the lens assembly 400 from the end surface of the lens assembly connecting part 420 and penetrates through the second accommodating cavity 412 to reach the sidewall of the lens assembly body 410, so as to ensure the fixing strength of the positioning pin 430 and the mounting accuracy of the positioning pin. Optionally, the lens assembly 400 is provided with a positioning hole, and then the positioning pin 430 is fixedly mounted in the positioning hole, so that the positioning and mounting accuracy of the positioning pin is ensured through the positioning hole.

In the embodiment of the present application, to further ensure the strength and the service life of the positioning pin 430, the positioning pin 430 may be made of a metal material having sufficient corrosion resistance and strength. Alternatively, the locator PINs 430 may be PIN PINs. In the embodiment of the present application, the lens assembly connecting portion 420 is provided with a first positioning hole 424, the lens assembly body 410 is provided with a second positioning hole 4122, and the first positioning hole 424 and the second positioning hole 4122 are in one-to-one correspondence, that is, the lens assembly 400 is provided with a through hole penetrating through the front end and the tail end of the lens assembly 400, so that the positioning pin 430 sequentially passes through the first positioning hole 424 and the second positioning hole 4122, and then the positioning pin 430 is fixed in the first positioning hole 424 and the second positioning hole 4122 by dispensing. Of course, in the embodiment of the present application, the positioning holes may also be in the form of half holes, that is, the positioning holes for installing the positioning pins 430 only extend into the interior of the lens assembly 400 and do not extend through the front end and the end of the lens assembly 400, for example, the positioning holes extend to communicate with the second accommodating chamber 412. In the embodiment of the present application, the number of the positioning pins 430 is usually not unique, and a pair of positioning pins is usually used, that is, the number of the positioning pins 430 may be two. Optionally, two alignment pins 430 are symmetrically disposed on lens assembly 400.

In the embodiment of the present application, the lens assembly connecting portion 420 is provided with a positioning groove 422. Optionally, the positioning groove 422 is disposed at a side of the lens assembly connecting portion 420, which facilitates the connection of the lens assembly connecting portion 420 with the chuck assembly 500 and the arrangement. The side of the corresponding jaw assembly 500 is provided with a positioning protrusion, and the positioning protrusion is matched with the positioning groove 422 to realize the connection between the lens assembly connecting part 420 and the jaw assembly 500. Further, the both sides of lens subassembly connecting portion 420 set up constant head tank 422 respectively, and then jaw assembly 500's both sides set up the location respectively protruding, and the location of jaw assembly 500 both sides is protruding to be connected with the constant head tank 422 cooperation of lens subassembly connecting portion 420 both sides and is realized being connected of lens subassembly connecting portion 420 and jaw assembly 500, guarantees lens subassembly 400 and jaw assembly 500's firm in connection. Of course, to connect the lens assembly 400 and the chuck assembly 500, a positioning protrusion may be disposed on the lens assembly connecting portion 420, and a positioning groove may be disposed on the chuck assembly 500.

Further, a second lens array 421 is disposed on an end surface of the lens assembly connecting portion 420, and the second lens array 421 may be formed by arranging a plurality of lens protrusions. The second lens array 421 serves to focus the signal light generated by the light emitting chip reflected by the first reflective surface and collimate the signal light input through the external optical fiber. In this embodiment, the end surface of the lens assembly connecting part 420 is provided with the first groove 4211, and the bottom surface of the first groove 4211 is provided with the second lens array 421, so that the second lens array 421 is prevented from being scratched in the assembling process, and the use safety of the second lens array 421 is ensured.

Further, a positioning boss 423 is provided on an end surface of the lens assembly coupling part 420. The positioning boss 423 may be used to support and position the optical fiber connector of the external optical fiber.

FIG. 8 is a cross-sectional view of a lens assembly provided in an embodiment of the present application. As shown in fig. 8, the lens assembly connecting portion 420 is provided with a first positioning hole 424, the sidewall of the lens assembly body 410 is provided with a second positioning hole 4122, and the positioning pin 430 is inserted into the first positioning hole 424 and the second positioning hole 4122. Further, to facilitate dispensing and fixing the positioning pin 430, dispensing grooves are respectively formed at the end of the first positioning hole 424 and the end of the second positioning hole 4122, and dispensing is performed at the dispensing grooves.

Fig. 9 is a cross-sectional view of a lens assembly disposed on a circuit board according to an embodiment of the present application. As shown in fig. 9, a light emitting chip 301 is disposed on the circuit board 300, and the lens assembly 400 is fixedly disposed on the circuit board 300 and covers the light emitting chip 301 in the second receiving cavity 412. In the working process of the light emitting chip 301, the signal light generated by the light emitting chip 301 is transmitted to the first lens array 4121, collimated by the first lens array 4121 and transmitted to the first reflecting surface 4111 at the bottom of the first accommodating cavity 411, and then reflected by the first reflecting surface 4111 and transmitted to the second lens array 421, where the first reflecting surface 4111 is used to convert the signal light whose optical axis is perpendicular to the circuit board 300 into the signal light whose optical axis is parallel to the circuit board 300, and finally converged by the second lens array 421 and transmitted out of the lens assembly 400 and into the external optical fiber, and an arrow in fig. 9 indicates the propagation direction of the signal light generated by the light emitting chip 301. Accordingly, when the lens assembly 400 is used for transmitting signal light input by an external optical fiber, the signal light input by the external optical fiber is transmitted to the second lens array 421, collimated by the second lens array 421, then transmitted to the first reflecting surface 4111 at the bottom of the first accommodating cavity 411, reflected by the first reflecting surface 4111 and transmitted to the first lens array 4121, the first reflecting surface 4111 is used for converting the signal light with an optical axis parallel to the circuit board 300 into signal light with an optical axis perpendicular to the circuit board 300, and finally focused by the first lens array 4121 and transmitted to the light receiving chip, wherein the propagation direction of the signal light according to the reversibility of light transmission can be referred to as the direction opposite to the direction indicated by the arrow in fig. 9.

Fig. 10 is a schematic view of an assembly structure of a lens assembly and a chuck assembly according to an embodiment of the present disclosure, and fig. 11 is an exploded schematic view of a lens assembly and a chuck assembly according to an embodiment of the present disclosure. As shown in fig. 10 and 11, the latch assembly 500 is a mainly cavity structure, and is used for connecting the lens assembly 400 and an external optical fiber connector, and further connecting the lens assembly 400 and an external optical fiber. Wherein: one end of lens assembly 400 is connected to one end of jaw assembly 500, i.e., lens assembly connection portion 420 is connected to one end of jaw assembly 500; one end of the positioning pin 430 and the positioning boss 423 extend into the cavity of the jaw assembly 500, and the optical fiber interface of the external optical fiber is inserted into the jaw assembly 500 to couple the external optical fiber with the lens assembly 400.

In the embodiment of the present application, the latch assembly 500 includes an MPO latch 510, where the MPO latch 510 is a cavity structure, and the MPO latch 510 is mainly used for inserting and fixing a fiber connector of an external fiber; one end of the MPO latch 510 is provided with a shielding plate 520, on one hand, the shielding plate 520 is used for limiting the optical fiber joints of the external optical fibers, and on the other hand, the shielding plate 520 is used for isolating the optical fiber joints of the external optical fibers from the part of the lens assembly 400. Further, the MPO claw 510 is made of a polymer material through injection molding, the shielding plate 520 is of a metal sheet structure, and the shielding plate 520 is fixed at one end of the MPO claw 510, so that the optical fiber connector of the external optical fiber is isolated from the lens assembly 400, the electromagnetic isolation of the optical module can be realized, and the anti-electromagnetic interference capability of the optical module is ensured.

The shielding plate 520 is provided with a positioning pin through hole 521, and one end of the positioning pin 430 for positioning the external optical fiber is inserted into the positioning pin through hole 521. The shielding plate 520 is provided with a second groove 522, and the second groove 522 is used for transmitting signal light transmitted between the external optical fiber and the lens assembly 400. Optionally, the second groove 522 is disposed corresponding to the first groove 4211. The shielding plate 520 is further provided with a boss through hole 523, and the positioning boss 423 is arranged in the boss through hole 523 in a penetrating manner.

Further, in the embodiment of the present application, a hook 511 is disposed on the MPO claw 510, and the hook 511 is used for fastening and fixing an optical fiber connector of an external optical fiber, so as to facilitate insertion and extraction of the optical fiber connector. Optionally, two hooks are arranged on the MPO claw 510, and the two hooks 511 are respectively symmetrically arranged on the side of the MPO claw 510.

Fig. 12 is a first cross-sectional view of a lens assembly and a latch provided in an embodiment of the present application, and fig. 13 is a second cross-sectional view of a lens assembly and a latch provided in an embodiment of the present application. As shown in fig. 12 and 13, a shielding plate 520 is fixedly provided at one end of the MPO latch 510, one end of a positioning pin 430 protrudes into the interior of the MPO latch 510 by passing through a positioning pin through-hole 521 on the shielding plate 520, and one end of a positioning boss 423 protrudes into the interior of the MPO latch 510 by passing through a boss through-hole 523 on the shielding plate 520.

As shown in fig. 13, a positioning protrusion 512 is disposed on a side edge of one end of the claw 510, a positioning groove 422 is disposed on a side edge of the lens assembly connecting portion 420, and the positioning protrusion 512 is connected with the positioning groove 422 in a matching manner to connect the claw 510 and the lens assembly 400.

Fig. 14 is a cross-sectional view of an optical module provided in an embodiment of the present application, and fig. 14 shows an assembly structure of a lens assembly 400 and a jaw assembly 500 in the optical module provided in the embodiment of the present application. As shown in fig. 14, the latch assembly 500 is disposed in the optical module optical port 205, and the lens assembly 400 is disposed at the end of the circuit board 300 near the optical module optical port 205. When the external optical fibers of the lens assembly 400 are coupled, the lens assembly 400 can be directly coupled with the external optical fibers through the claw assembly 500, so that optical signals between the lens assembly 400 and the external optical fibers can be directly transmitted, optical fiber ribbons required for transmitting the optical signals between the lens assembly 400 and the external optical fibers are saved, the space for arranging the optical fiber ribbons in the optical module is reduced, and the further development of the optical module is facilitated. Optionally, the top and bottom of the jaw assembly 500 are fixedly connected to the upper and

lower housings

201 and 202 of the optical module.

Further, in the present embodiment, the lens assembly 400 is disposed on the front surface of the circuit board 300, i.e., the lens assembly 400 is located between the circuit board 300 and the upper housing 201; in order to avoid displacement of the lens assembly 400 during insertion and extraction of the external optical fiber, the inner side of the upper housing 201 is provided with a limiting protrusion 2011, the limiting protrusion 2011 abuts against and supports the tail end of the lens assembly body 410, and then the limiting protrusion 2011 can support the lens assembly 400 at the tail end of the lens assembly body 410 during insertion and extraction of the external optical fiber. In this embodiment, the lens assembly 400 may be further disposed on the opposite side of the circuit board 300, and then the lens assembly 400 is located between the circuit board 300 and the lower housing 202, and then the inner side of the lower housing 202 is disposed with a limiting protrusion, and the limiting protrusion abuts against the end of the lens assembly body 410.

Fig. 15 is a schematic structural diagram of a lower shell in an optical module according to an embodiment of the present disclosure, and fig. 16 is a schematic structural diagram of an upper shell in an optical module according to an embodiment of the present disclosure. As shown in fig. 15 and 16, positioning pillars 513 are disposed on the bottom side of the jaw assembly 500, and corresponding positioning holes 2021 are disposed on the lower housing 202, and the positioning pillars 513 are matched with the positioning holes 2021 to achieve relative fixing between the jaw assembly 500 and the lower housing 202. Optionally, the positioning column 513 is provided on the MPO claw 510. In the embodiment of the present application, positioning holes may be further disposed on the bottom side of the latch assembly 500 to position the posts at corresponding positions of the lower housing 202. Further, in the embodiment of the present application, the claw assembly 500 and the upper housing 201 may also be fixed in a manner of a positioning hole and a positioning column.

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 application 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 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.

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;

the lens assembly is arranged at the end part of the circuit board close to an optical port of the optical module, covers the light emitting chip and the light receiving chip and is used for changing the propagation direction of the signal light emitted by the light emitting chip and the signal light to be received by the light receiving chip;

the lens assembly connecting part is connected with the jaw assembly, and the lens assembly is in optical connection with an external optical fiber connector through the jaw assembly;

2. The optical module of claim 1, wherein the lens assembly body comprises a first receiving cavity disposed at a top portion and a second receiving cavity disposed at a bottom portion;

the bottom of the first accommodating cavity is provided with a first reflecting surface, the second accommodating cavity covers and accommodates the light emitting chip and the light receiving chip, and the projection of the first reflecting surface in the direction of the circuit board covers the light emitting chip and the light receiving chip.

3. The optical module according to claim 2, wherein a first lens array is disposed on the second receiving cavity, and a projection of the first lens array in the direction of the circuit board covers the light emitting chip and the light receiving chip.

4. The optical module according to claim 2, wherein a first positioning hole is disposed on the lens assembly connecting portion, a second positioning hole is disposed on the lens assembly body, and the first positioning hole and the second positioning hole are respectively communicated with the second accommodating cavity, so that a tip of the positioning pin is disposed in the lens assembly body and the positioning pin penetrates through the second accommodating cavity.

5. The optical module according to claim 1, wherein a first groove is provided on an end surface of the lens assembly connecting part, and a second lens array is provided on a bottom surface of the first groove.

6. The optical module of claim 1, wherein a positioning protrusion is disposed at one end of the claw assembly, a positioning groove is disposed at a side edge of the lens assembly connecting portion, and the positioning protrusion is connected to the positioning groove in a fitting manner.

7. The optical module according to claim 1, wherein the latch assembly comprises an MPO latch, one end of the MPO latch is provided with a shielding plate, the shielding plate is provided with a positioning pin through hole, and the other end of the positioning pin penetrates through the positioning pin through hole.

8. The optical module according to claim 7, wherein a positioning boss is disposed on an end surface of the lens assembly connecting portion, a boss through hole is disposed on the shielding plate, and the positioning boss is disposed in the boss through hole.

9. The optical module as claimed in claim 1, wherein a positioning post is disposed on a bottom side of the latch assembly, and a positioning hole is disposed on a lower housing of the optical module, and the positioning post is connected to the positioning hole in a fitting manner.

10. The optical module of claim 1, wherein a limiting protrusion is disposed inside the upper housing of the optical module, and the limiting protrusion supports the end of the lens assembly body in an abutting manner.