CN216449796U

CN216449796U - Optical module

Info

Publication number: CN216449796U
Application number: CN202220305451.6U
Authority: CN
Inventors: 孙金星; 张鑫
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-05-06
Anticipated expiration: 2032-02-15

Abstract

The application provides an optical module which comprises an optical emission assembly and a flexible circuit board, wherein the optical emission assembly comprises an emission shell and an electric connector, one end of the electric connector is inserted into the emission shell, and the other end of the electric connector is positioned outside the emission shell; the flexible circuit board comprises a first side surface facing the electric connector, a bulge is arranged on the first side surface, the bulge comprises a second side surface facing the electric connector, the second side surface is abutted with the shell wall of the electric connector, and the distance between the first side surface and the second side surface is a preset value; pads are positioned side-by-side along the first side and electrically connected to the electrical connector, the pads being spaced a predetermined distance from the housing wall. According to the optical eye pattern welding method and device, the bulge is arranged at one end of the flexible circuit board, the second side face of the bulge is abutted to the shell wall of the electric connector, and the preset distance exists between the welding disc arranged along the first side face of the flexible circuit board and the shell wall, so that the optical eye pattern performance is optimal, the welding consistency of the flexible circuit board is ensured, and the reject ratio of the optical eye pattern is reduced.

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.

The optical module generally includes a circuit board, and a light emitting module and a light receiving module electrically connected to the circuit board, so as to implement light emission through the light emitting module and light reception through the light receiving module. When the air tightness design is required, the light emitting assembly adopts a design scheme that an air-tight tube shell is welded with a flexible circuit board, wherein the welding positions of the flexible circuit board are different, and the Margin of an optical eye diagram Margin is directly influenced. When the optical eye diagram Margin is processed in batch, the welding alignment controllability of the flexible circuit board on the side of the light emitting assembly is poor, and the situation that the welding position of the flexible circuit board deviates from the ideal position is easy to occur, so that the performance of the optical eye diagram Margin is deteriorated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical module to solve the problem that the performance of an optical eye diagram deteriorates due to the fact that the deviation between the actual welding position and the ideal welding position of a flexible circuit board on the transmitting side is large.

In a first aspect, the present application provides an optical module, comprising:

a circuit board;

the light emitting assembly is electrically connected with the circuit board and comprises an emitting shell and an electric connector, one end of the electric connector is inserted into the emitting shell, and the other end of the electric connector is positioned outside the emitting shell; the electric connector comprises a shell wall positioned outside the emission shell, a platform extending to the circuit board is arranged on the shell wall, and pins are arranged on the platform;

the flexible circuit board is respectively electrically connected with the electric connector and the circuit board, comprises a first side surface facing the electric connector, and is provided with welding pads in parallel along the first side surface; a protrusion extending towards the electric connector is arranged on the first side surface, the protrusion comprises a second side surface facing the electric connector, and the distance between the first side surface and the second side surface is a preset value; the second side is abutted against the shell wall, a preset distance exists between the pad and the shell wall, and the pad is electrically connected with the pin.

In a second aspect, the present application further provides an optical module, including:

a circuit board;

one end of the flexible circuit board is electrically connected with the circuit board, the other end of the flexible circuit board comprises a first side face, and pads are arranged side by side along the first side face;

the light emitting assembly is electrically connected with the flexible circuit board and comprises an emitting shell and an electric connector, one end of the electric connector is inserted into the emitting shell, and the other end of the electric connector is positioned outside the emitting shell; a limit table extending towards the flexible circuit board is arranged on the shell wall of the electric connector, and the distance between the side face, facing the flexible circuit board, of the limit table and the shell wall of the electric connector is a preset value; the side surface of the limiting table facing the flexible circuit board is abutted with the first side surface; the shell wall is provided with a platform extending towards the flexible circuit board, the platform is provided with pins, the pad is electrically connected with the pins, and a preset distance exists between the pad and the shell wall.

As can be seen from the foregoing embodiments, an optical module is provided in the embodiments of the present application, and includes a light emitting assembly and a flexible circuit board, where the light emitting assembly includes a transmitting housing and an electrical connector, one end of the electrical connector is inserted into the transmitting housing, the other end of the electrical connector is located outside the transmitting housing, the electrical connector includes a housing wall located outside the transmitting housing, a platform extending toward the circuit board is disposed on the housing wall, and a pin is disposed on the platform; one end of the flexible circuit board is electrically connected with the circuit board, the other end of the flexible circuit board is electrically connected with the electric connector, the flexible circuit board comprises a first side surface facing the electric connector, welding pads are arranged side by side along the first side surface, and the welding pads are electrically connected with pins on the electric connector; the first side surface is provided with a bulge extending towards the electric connector, the bulge comprises a second side surface facing the electric connector, the distance between the first side surface and the second side surface is a preset value, the preset value is the relative distance of a welding position when the performance of an optical eye pattern between the tail end of a bonding pad on the flexible circuit board and the emission shell is optimal, and when the bonding pad on the flexible circuit board is electrically connected with the bonding pad on the electric connector by the preset distance, the performance of the optical eye pattern is optimal; the second side surface of the flexible circuit board is abutted against the shell wall of the electric connector, and a preset distance exists between the welding disc and the shell wall of the electric connector, so that the welding alignment problem of the flexible circuit board can be simply and quickly completed, the batch welding alignment of the flexible circuit board is simpler, the consistency of the welding performance of the flexible circuit board is ensured, and the reject ratio of the optical eye pattern is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

FIG. 1 is a connection diagram of an optical communication system according to some embodiments;

FIG. 2 is a block diagram of an optical network terminal according to some embodiments;

FIG. 3 is a block diagram of a light module according to some embodiments;

FIG. 4 is an exploded view of a light module according to some embodiments;

fig. 5 is a schematic structural diagram of a light emitting assembly in an optical module according to an embodiment of the present disclosure;

fig. 6 is a partially exploded schematic view of a light emitting module in an optical module according to an embodiment of the present disclosure;

fig. 7 is a schematic partial structure diagram of a light emitting assembly in an optical module according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an electrical connector in an optical module according to an embodiment of the present disclosure;

fig. 9 is a schematic view of another angular structure of an electrical connector in an optical module according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a flexible circuit board in an optical module according to an embodiment of the present disclosure;

fig. 11 is a top view of a flexible circuit board in an optical module according to an embodiment of the present disclosure;

fig. 12 is a schematic partial assembly diagram of an electrical connector and a flexible circuit board in an optical module according to an embodiment of the present disclosure;

fig. 13 is another schematic structural diagram of an electrical connector in an optical module according to an embodiment of the present disclosure;

fig. 14 is another schematic structural diagram of a flexible circuit board in an optical module according to an embodiment of the present disclosure;

fig. 15 is a schematic partial assembly diagram of an electrical connector and a flexible circuit board in an optical module according to an embodiment of the present disclosure.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and its other forms, such as the third person's singular form "comprising" and the present participle form "comprising" are to be interpreted in an open, inclusive sense, i.e. as "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, expressions of "coupled" and "connected," along with their derivatives, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

"at least one of A, B and C" has the same meaning as "A, B or at least one of C", both including the following combination of A, B and C: a alone, B alone, C alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

The use of "adapted to" or "configured to" herein is meant to be an open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps.

As used herein, "about," "approximately," or "approximately" includes the stated values as well as average values that are within an acceptable range of deviation for the particular value, as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system).

In the optical communication technology, light is used to carry information to be transmitted, and an optical signal carrying the information is transmitted to information processing equipment such as a computer through information transmission equipment such as an optical fiber or an optical waveguide, so as to complete information transmission. Because the optical signal has the passive transmission characteristic when being transmitted through the optical fiber or the optical waveguide, the information transmission with low cost and low loss can be realized. Further, since a signal transmitted by an information transmission device such as an optical fiber or an optical waveguide is an optical signal and a signal that can be recognized and processed by an information processing device such as a computer is an electrical signal, it is necessary to perform interconversion between the electrical signal and the optical signal in order to establish an 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.

The optical module realizes the function of interconversion between the optical signal and the electrical signal in the technical field of optical fiber communication. The optical module comprises an optical port and an electrical port, the optical module realizes optical communication with information transmission equipment such as optical fibers or optical waveguides and the like through the optical port, realizes electrical connection with an optical network terminal (such as an optical modem) through the electrical port, and the electrical connection is mainly used for realizing power supply, I2C signal transmission, data signal transmission, grounding and the like; the optical network terminal transmits the electric signal to the computer and other information processing equipment through a network cable or a wireless fidelity (Wi-Fi).

Fig. 1 is a connection diagram of an optical communication system according to some embodiments. As shown in fig. 1, the optical communication system mainly includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101, and a network cable 103;

one end of the optical fiber 101 is connected to the remote server 1000, and the other end is connected to the optical network terminal 100 through the optical module 200. The optical fiber itself can support long-distance signal transmission, for example, signal transmission of several kilometers (6 kilometers to 8 kilometers), on the basis of which if a repeater is used, ultra-long-distance transmission can be theoretically achieved. Therefore, in a typical optical communication system, the distance between the remote server 1000 and the optical network terminal 100 may be several kilometers, tens of kilometers, or hundreds of kilometers.

One end of the network cable 103 is connected to the local information processing device 2000, and the other end is connected to the optical network terminal 100. The local information processing apparatus 2000 may be any one or several of the following apparatuses: router, switch, computer, cell-phone, panel computer, TV set etc..

The physical distance between the remote server 1000 and the optical network terminal 100 is greater than the physical distance between the local information processing apparatus 2000 and the optical network terminal 100. The connection between the local information processing device 2000 and the remote server 1000 is completed by 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 module 200 and the optical network terminal 100.

The optical module 200 includes an optical port and an electrical port. The optical port is configured to connect with the optical fiber 101, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101; the electrical port is configured to be accessed into the optical network terminal 100, so that the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. The optical module 200 converts an optical signal and an electrical signal to each other, so that a connection is established between the optical fiber 101 and the optical network terminal 100. For example, an optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input to the optical network terminal 100, and an electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input to the optical fiber 101.

The optical network terminal 100 includes a housing (housing) having a substantially rectangular parallelepiped shape, and an optical module interface 102 and a network cable interface 104 provided on the housing. The optical module interface 102 is configured to access the optical module 200, so that the optical network terminal 100 establishes a bidirectional electrical signal connection with the optical module 200; the network cable interface 104 is configured to access the network cable 103 such that the optical network terminal 100 establishes a bi-directional electrical signal connection with the network cable 103. The optical module 200 is connected to the network cable 103 via the optical network terminal 100. For example, the optical network terminal 100 transmits an electrical signal from the optical module 200 to the network cable 103, and transmits a signal from the network cable 103 to the optical module 200, so that the optical network terminal 100 can monitor the operation of the optical module 200 as an upper computer of the optical module 200. The upper computer of the Optical module 200 may include an Optical Line Terminal (OLT) and the like in addition to the Optical network Terminal 100.

The remote server 1000 establishes a bidirectional signal transmission channel with the local information processing device 2000 through the optical fiber 101, the optical module 200, the optical network terminal 100, and the network cable 103.

Fig. 2 is a structural diagram of an optical network terminal according to some embodiments, and fig. 2 only shows a structure of the optical module 100 related to the optical module 200 in order to clearly show a connection relationship between the optical module 200 and the optical network terminal 100. As shown in fig. 2, the optical network terminal 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on a surface of the PCB circuit board 105, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access an electrical port of the optical module 200; the heat sink 107 has a projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into a cage 106 of the optical network terminal 100, the cage 106 holds the optical module 200, and heat generated by the optical module 200 is conducted to the cage 106 and then diffused by a heat sink 107. After the optical module 200 is inserted into the cage 106, an electrical port of the optical module 200 is connected to an electrical connector inside the cage 106, and thus the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. Further, the optical port of the optical module 200 is connected to the optical fiber 101, and the optical module 200 establishes bidirectional electrical signal connection with the optical fiber 101.

Fig. 3 is a block diagram of a light module according to some embodiments, and fig. 4 is an exploded view of a light module according to some embodiments. As shown in fig. 3 and 4, the optical module 200 includes a housing, a circuit board 300 disposed in the housing, and an optical transceiver;

the shell comprises an upper shell 201 and a lower shell 202, wherein the upper shell 201 is covered on the lower shell 202 to form the shell with two

openings

204 and 205; the outer contour of the housing generally appears square.

In some embodiments of the present disclosure, the lower housing 202 includes a bottom plate and two lower side plates located at two sides of the bottom plate and disposed perpendicular to the bottom plate; the upper housing 201 includes a cover plate, and two upper side plates disposed on two sides of the cover plate and perpendicular to the cover plate, and is combined with the two side plates by two side walls to cover the upper housing 201 on the lower housing 202.

The direction of the connecting line of the two

openings

204 and 205 may be the same as the length direction of the optical module 200, or may not be the same as the length direction of the optical module 200. For example, the opening 204 is located at an end (right end in fig. 3) of the optical module 200, and the opening 205 is also located at an end (left end in fig. 3) of the optical module 200. Alternatively, the opening 204 is located at an end of the optical module 200, and the opening 205 is located at a side of the optical module 200. Wherein, the opening 204 is an electrical port, and the gold finger of the circuit board 300 extends out of the electrical port 204 and is inserted into an upper computer (such as the optical network terminal 100); the opening 205 is an optical port configured to receive the external optical fiber 101, so that the optical fiber 101 is connected to an optical transceiver inside the optical module 200.

The upper shell 201 and the lower shell 202 are combined in an assembly mode, so that devices such as the circuit board 300 and the optical transceiver can be conveniently installed in the shells, and the upper shell 201 and the lower shell 202 can form packaging protection for the devices. In addition, when the devices such as the circuit board 300 are assembled, the positioning components, the heat dissipation components and the electromagnetic shielding components of the devices are convenient to arrange, and the automatic implementation production is facilitated.

In some embodiments, the upper housing 201 and the lower housing 202 are generally made of metal materials, which is beneficial to achieve electromagnetic shielding and heat dissipation.

In some embodiments, the optical module 200 further includes an unlocking component 203 located on an outer wall of a housing thereof, and the unlocking component 203 is configured to realize a fixed connection between the optical module 200 and an upper computer or release the fixed connection between the optical module 200 and the upper computer.

Illustratively, the unlocking member 203 is located on the outer walls of the two lower side plates of the lower housing 202, and includes a snap-fit member that mates with a cage of an upper computer (e.g., the cage 106 of the optical network terminal 100). When the optical module 200 is inserted into the cage of the upper computer, the optical module 200 is fixed in the cage of the upper computer by the engaging member of the unlocking member 203; when the unlocking member 203 is pulled, the engaging member of the unlocking member 203 moves along with the unlocking member, and the connection relationship between the engaging member and the upper computer is changed, so that the engagement relationship between the optical module 200 and the upper computer is released, and the optical module 200 can be drawn out from the cage of the upper computer.

The circuit board 300 includes circuit traces, electronic components, and chips, and the electronic components and the chips are connected together by the circuit traces according to a circuit design to implement functions of power supply, electrical signal transmission, grounding, and the like. The electronic components may include, for example, capacitors, resistors, transistors, Metal-Oxide-Semiconductor Field-Effect transistors (MOSFETs). The chip may include, for example, a Micro Controller Unit (MCU), a Transimpedance Amplifier (TIA), a Clock and Data Recovery (CDR), a power management chip, and a Digital Signal Processing (DSP) chip.

The circuit board 300 is generally a rigid circuit board, which can also perform a bearing function due to its relatively rigid material, for example, the rigid circuit board can stably bear a chip; the rigid circuit board can also be inserted into an electric connector in the cage of the upper computer.

The circuit board 300 further includes a gold finger formed on an end surface thereof, the gold finger being composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106 and electrically connected to the electrical connector in the cage 106 by gold fingers. The gold fingers may be disposed on only one side surface (e.g., the upper surface shown in fig. 4) of the circuit board 300, or may be disposed on both upper and lower surfaces of the circuit board 300, so as to adapt to the situation with a large demand for the number of pins. The golden finger is configured to establish an electrical connection with the upper computer to achieve power supply, grounding, I2C signal transmission, data signal transmission and the like. Of course, a flexible circuit board is also used in some optical modules. Flexible circuit boards are commonly used in conjunction with rigid circuit boards to supplement the rigid circuit boards.

The optical transceiver includes an optical transmitter module 400 and an optical receiver module 500, which are respectively used for transmitting and receiving optical signals. The light emitting assembly 400 generally includes a laser, a lens and a light detector, wherein the lens and the light detector are respectively located at different sides of the laser, the front side and the back side of the laser respectively emit light beams, and the lens is used for converging the light beams emitted from the front side of the laser, so that the light beams emitted from the laser are converged light to be conveniently coupled to an external optical fiber; the optical detector is used for receiving the light beam emitted from the reverse side of the laser so as to detect the optical power of the laser. Specifically, light emitted by the laser enters the optical fiber after being converged by the lens, and meanwhile, the light detector detects the light emitting power of the laser so as to ensure the constancy of the light emitting power of the laser.

When the optical module has a requirement for airtight design, the light emitting module 400 adopts a design scheme of an airtight shell and a flexible circuit board, wherein the difference of the welding positions of the flexible circuit board directly affects the Margin of the optical eye diagram Margin. During batch processing, the controllability of welding alignment of the flexible circuit board at the transmitting side is poor, and the situation that the welding position of the flexible circuit board deviates greatly from the ideal position is easy to occur, so that the performance of the optical eye diagram Margin is deteriorated.

In order to solve the problems, the application provides an optical module, when a flexible circuit board in the optical module is welded in batches, the flexible circuit board is simply and clearly aligned, welding consistency of the flexible circuit board is ensured, and the reject ratio of an optical eye pattern Margin is reduced.

Fig. 5 is a schematic structural diagram of a light emitting module in an optical module according to an embodiment of the present application, and fig. 6 is a schematic partial exploded view of the light emitting module in the optical module according to the embodiment of the present application. As shown in fig. 5 and 6, the optical module provided in the embodiment of the present application includes a light emitting assembly 400 and a flexible circuit board 600, one end of the flexible circuit board 600 is electrically connected to the circuit board 300, and the other end of the flexible circuit board 600 is electrically connected to the light emitting assembly 400, so that an electrical signal on the circuit board 300 is transmitted to the light emitting assembly 400 through the flexible circuit board 600 to drive the light emitting assembly 400 to emit a light signal.

The light emitting assembly 400 includes an emission housing 401 and an electrical connector 402, one end of the emission housing 401 facing the flexible circuit board 600 is provided with a socket 403, the socket 403 is communicated with an inner cavity of the emission housing 401, one end of the electrical connector 402 is inserted into the emission housing 401 through the socket 403, the other end of the electrical connector 402 is located outside the emission housing 401, and the electrical connector 402 located outside the emission housing 401 is electrically connected with the flexible circuit board 600.

The laser is arranged in the inner cavity of the emission shell 401 and can be electrically connected with the electric connector 402 in the emission shell 401 through routing, so that the flexible circuit board 600 is electrically connected with the laser in the emission shell 401 through the electric connector 402. In order to satisfy the air tightness requirement of the light emitting assembly 400, the electrical connector 402 is hermetically sealed with the emission housing 401, and the laser inside the emission housing 401 is electrically connected with the external flexible circuit board 600 through the electrical connector 402 for electrical signal switching through the electrical connector 402.

An optical fiber adapter 700 is arranged at one end of the emission shell 401, which faces away from the flexible circuit board 600, the optical fiber adapter 700 is fixedly connected with the emission shell 401, so that an optical signal emitted by a laser in the emission shell 401 penetrates through the emission shell 401 to be incident into the optical fiber adapter 700, and then is transmitted to an external optical fiber through the optical fiber adapter 700, thereby realizing light emission.

Fig. 7 is a schematic partial structure diagram of a light emitting assembly in a light module according to an embodiment of the present application. As shown in fig. 7, the light emitting module 400 further includes a cover plate 404, an end of the emission housing 401 facing the upper housing 201 is open, and the cover plate 404 covers the opening of the emission housing 401, so that the emission housing 401, the cover plate 404 and the electrical connector 402 form a sealed light emitting module 400.

A laser 410, a collimating lens 420, a light path translation prism 450 and an optical window 460 are arranged in an inner cavity of the emitting housing 401, a laser beam emitted by the laser 410 is converted into a collimated beam through the collimating lens 420, the collimated beam is reflected in the light path translation prism 450, the transmission direction of the light path is changed, and the light beam with the changed transmission direction is emitted into the optical fiber adapter 700 through the optical window 460.

In some embodiments, the light emitting assembly 400 includes a plurality of lasers 410, a plurality of collimating lenses 420, and a light combiner 440, the lasers 410 and the collimating lenses 420 are disposed in a one-to-one correspondence, the plurality of lasers 410 respectively emit laser beams, and each laser beam is converted into a collimated beam through one collimating lens 420; the multiple paths of collimated light beams are respectively transmitted into the optical multiplexer 440, the multiple paths of collimated light beams are reflected and combined in the optical multiplexer 440 to output one path of composite light beam, the composite light beam is subjected to light path translation through the light path translation prism 450, and the translated composite light beam penetrates through the light window 460 and enters the optical fiber adapter 700.

In some embodiments, the light emitting module 400 further includes a support 430, the support 430 is fixed on the bottom surface of the emitting housing 401, and the optical combiner 440 and the optical path translation prism 450 are fixed on the support 430, so as to ensure that the light receiving direction of the optical combiner 440 and the light emitting direction of the laser 410 are aligned, so that the collimated light beam output by the collimating lens 420 is smoothly emitted into the optical combiner 440.

Fig. 8 is a schematic structural diagram of an electrical connector in an optical module according to an embodiment of the present disclosure, and fig. 9 is another schematic angular structural diagram of the electrical connector in the optical module according to the embodiment of the present disclosure. As shown in fig. 8 and 9, one end of the electrical connector 402 inside the emission housing 401 is provided with a first groove 4021 and a second groove 4022, the first groove 4021 is recessed in the second groove 4022, and the first groove 4021 and the second groove 4022 are respectively provided with a pad, the laser 410 can be electrically connected to the first groove 4021 and the pad on the second groove 4022 by routing, so as to electrically connect the laser 410 and the electrical connector 402, and the electrical connector 402 switches the driving electrical signal to the laser 410, so as to drive the laser 410 to emit a laser beam.

The electrical connector 402 is provided with a platform 4023 on the housing wall outside the transmitting housing 401, the platform 4023 extends towards the flexible circuit board 600, a pin is arranged on the side surface of the platform 4023, the pin extends from the housing wall of the electrical connector 402 towards the flexible circuit board 600 (from inside to outside), and a pad on the flexible circuit board 600 is welded with the pin on the platform 4023 so as to weld the flexible circuit board 600 and the electrical connector 402 together.

In some embodiments, the platform 4023 includes a first mounting surface 4024 disposed toward a side of the upper housing 201, the first mounting surface 4024 having a first pin 4025 disposed thereon; the side of the platform 4023 facing the lower housing 202 is provided with a second mounting surface 4026, and the second mounting surface 4026 is provided with a second pin 4027.

Fig. 10 is a schematic structural diagram of a flexible circuit board in an optical module provided in the embodiment of the present application, and fig. 11 is a top view of the flexible circuit board in the optical module provided in the embodiment of the present application. As shown in fig. 10 and 11, the flexible circuit board 600 may include a first side 610 facing the electrical connector 402, and pads may be disposed side by side along the first side 610, and end edges of the pads may be flush with the first side 610. That is, the flexible circuit board 600 is provided with a plurality of pads side by side in the up-down direction of fig. 11, and the end edges of the pads are flush with the first side surface 610.

The first side surface 610 is provided with a protrusion extending towards the electrical connector 402, the protrusion comprises a second side surface 620 facing the electrical connector 402, and the distance between the first side surface 610 and the second side surface 620 is a preset value, and the preset value is the size of the optimal width a for soldering the flexible circuit board when the performance of the optical eye pattern Margin is optimal.

Specifically, according to the performance test result of the optical eye pattern Margin, the optimal design scheme of the flexible circuit board is selected, meanwhile, the optimal relative position of the flexible circuit board 600 and the electric connector 402 is found out, the relative distance A of the welding position when the optical eye pattern performance between the tail end of the pad on the flexible circuit board 600 and the shell wall of the electric connector 402 is optimal is obtained, and the distance between the first side surface 610 and the second side surface 620 on the flexible circuit board 600 is set to be the distance A when the optical eye pattern performance is optimal.

In some embodiments, the distance a when the optical eye diagram performance is optimal is set by the actual condition of the optical module, and the distance a may be different for different optical modules, for example, according to the actual condition, the distance a when the optical eye diagram performance is optimal is 0.2mm, so that the distance between the first side surface 610 and the second side surface 620 on the flexible circuit board 600 is set to be 0.2 mm.

In some embodiments, to simply and quickly complete the soldering alignment between the flexible circuit board 600 and the electrical connector 402, at least two bumps are included on the flexible circuit board 600, for example, the bumps include a first bump 601 and a second bump 602, a gap exists between the first bump 601 and the second bump 602, a side of the first bump 601 facing the electrical connector 402 and a side of the second bump 602 facing the electrical connector 402 are located on the same side, and both are the second side 620.

The first bump 601 comprises a first connection surface 630, the first side surface 610 is connected with the second side surface 620 through the first connection surface 630, and the side surface of the first bump 601 opposite to the first connection surface 630 and a side wall of the flexible circuit board 600 are flush; the second protrusion 602 includes a second connection surface 640, the first side surface 610 is connected to the second side surface 620 through the second connection surface 640, and a side surface of the second protrusion 602 opposite to the second connection surface 640 and another side wall of the flexible circuit board 600 are flush with each other. That is, a groove is formed at an end of the flexible circuit board 600 facing the electrical connector 402, the groove is disposed along a direction of the first side surface 610 (vertical direction in fig. 11), a dimension of the groove in the vertical direction is smaller than a dimension of the flexible circuit board 600 in the vertical direction, and the groove is opened toward one side of the electrical connector 402, such that the groove is a U-shaped groove formed by the first side surface 610, the first connection surface 630 and the second connection surface 640, and the dimension of the first side surface 610 in the vertical direction is larger than the dimension of the remaining end surface (the second side surface 620) of the flexible circuit board 600 in the vertical direction.

Fig. 12 is a schematic partial assembly diagram of an electrical connector and a flexible circuit board in an optical module according to an embodiment of the present disclosure. As shown in fig. 12, when the flexible circuit board 600 is assembled with the electrical connector 402, one side of the flexible circuit board 600 is contacted with one side of the mounting face of the platform 4023, so that the second side face 620 of the protrusion abuts against the housing wall of the electrical connector 402, and then the pads on the flexible circuit board 600 are soldered to the pins on the mounting face of the platform 4023, so that a preset distance exists between the pads on the flexible circuit board 600 and the housing wall of the electrical connector 402, thereby achieving an optimal soldering position of the flexible circuit board 600 and the electrical connector 402.

In some embodiments, the opposite side of the flexible circuit board 600 contacts the second mounting surface of the platform 4023, and then the flexible circuit board 600 is gradually moved toward the electrical connector 402 in the direction of the connection of the platform 4023 to the housing wall 4020 until the second side 620 of the flexible circuit board 600 abuts the housing wall 4020. After the second side 620 abuts against the housing wall 4020, pads on the flexible circuit board 600 are soldered to the second pins 4027 of the second mounting surface 4026 on the platform 4023, so that the flexible circuit board 600 is electrically connected to the electrical connector 402.

When the flexible circuit board 600 on the light emitting side is soldered in batch, the second side 620 of the flexible circuit board 600 is directly pressed against the housing wall 4020 of the electrical connector 402, so that the soldering alignment of the flexible circuit board can be simply and quickly completed, and the optical eye diagram performance between the pad tail end on the flexible circuit board 600 and the housing wall of the electrical connector 402 is ensured to be optimal.

The optical module provided by the embodiment of the application comprises an optical emission assembly and a flexible circuit board, wherein the optical emission assembly comprises an emission shell and an electric connector, one end of the electric connector is inserted into the emission shell, the other end of the electric connector is positioned outside the emission shell, a platform extending to the flexible circuit board is arranged on a shell wall of the electric connector positioned outside the emission shell, and pins are arranged on the platform; one end of the flexible circuit board is electrically connected with the circuit board, the other end of the flexible circuit board is electrically connected with the electric connector, the flexible circuit board comprises a first side face facing the electric connector, pads are arranged side by side along the first side face, the tail end edges of the pads are flush with the first side face, and the pads are electrically connected with pins on the electric connector; the first side surface is provided with a bulge extending towards the electric connector, the bulge comprises a second side surface facing the electric connector, the distance between the first side surface and the second side surface is a preset value, the preset value is the relative distance of a welding position when the performance of an optical eye pattern between the tail end of a bonding pad on the flexible circuit board and the emission shell is optimal, and when the bonding pad on the flexible circuit board is electrically connected with the bonding pad on the electric connector by the preset distance, the performance of the optical eye pattern is optimal; the second side surface of the flexible circuit board is abutted against the shell wall of the electric connector, and at the moment, a preset distance exists between the welding disc and the shell wall of the electric connector, so that the welding alignment problem of the flexible circuit board is simply and quickly completed, the batch welding alignment of the flexible circuit board is simpler, the consistency of the welding performance of the flexible circuit board is ensured, and the reject ratio of a light eye pattern is reduced.

In some embodiments, not only can the solder alignment of the flexible circuit board 600 and the electrical connector 402 be simply and quickly accomplished by providing the bumps on the flexible circuit board 600, but also the housing wall of the electrical connector 402 can be provided with the limiting table, and the batch solder alignment of the flexible circuit board can be simpler by abutting the limiting table with the end face of the flexible circuit board 600.

Fig. 13 is another schematic structural diagram of an electrical connector in an optical module according to an embodiment of the present disclosure. As shown in fig. 13, a position-limiting table 4028 is disposed on the housing wall of the electrical connector 402 outside the launching housing 401, the position-limiting table 4028 extends in the direction of the flexible circuit board 600, and the distance between the side of the position-limiting table 4028 facing the flexible circuit board 600 and the housing wall 4020 of the electrical connector 402 is a preset value a.

In some embodiments, the stop 4028 may be disposed along the length of the platform 4023, and the length of the stop 4028 is the same as the length of the platform 4023; the limiting table 4028 may also include a first limiting table and a second limiting table, and a gap exists between the first limiting table and the second limiting table.

Specifically, the electrical connector 402 is provided with a platform 4023 on the housing wall 4020 outside the firing housing 401, the platform 4023 extends toward the flexible circuit board 600, a second mounting surface 4026 is provided on one side of the platform 4023 facing the lower housing 202, a second pin 4027 is provided on the second mounting surface 4026, a limit stop 4028 is located on the second mounting surface 4026 of the platform 4023, and the limit stop 4028 extends from the second mounting surface 4026 toward the lower housing 202.

In the second pins 4027 disposed on the second mounting surface 4026, the edge of the second pin 4027 facing the limit stop 4028 and the side of the limit stop 4028 facing the flexible circuit board 600 are flush with each other, so that a predetermined distance a exists between one side edge of the second pin 4027 and the housing wall 4020 of the electrical connector 402, where the predetermined distance a is the relative distance between the soldering positions when the optical eye diagram performance between the terminal of the pad on the flexible circuit board and the emission housing 401 is optimal.

Fig. 14 is another schematic structural diagram of a flexible circuit board in an optical module provided in the embodiment of the present application. As shown in fig. 14, one end of the flexible circuit board 600 is electrically connected to the circuit board 300, and the other end includes a first side surface 610, where the first side surface 610 is an end surface of the flexible circuit board 600 facing the electrical connector 402; the pads are arranged side by side along the first side 610, that is, a plurality of pads are arranged side by side along the up-down direction in fig. 14, and the end edges of the pads are flush with the first side 610.

Fig. 15 is a schematic partial assembly diagram of an electrical connector and a flexible circuit board in an optical module according to an embodiment of the present application. As shown in fig. 15, when the flexible circuit board 600 is assembled with the electrical connector 402, one side of the flexible circuit board 600 is in contact with a mounting surface on one side of the platform 4023, so that the limit table 4028 on the housing wall 4020 of the electrical connector 402 abuts against an end surface of the flexible circuit board 600, and then the pads on the flexible circuit board 600 are soldered to the pins on the mounting surface of the platform 4023, so that a preset distance exists between the pads on the flexible circuit board 600 and the housing wall 4020, and an optimal soldering position between the flexible circuit board 600 and the electrical connector 402 is realized.

In some embodiments, the opposite surface of the flexible circuit board 600 contacts the second mounting surface 4026 of the platform 4023, and then the flexible circuit board 600 is gradually moved toward the positioning table 4028 on the electrical connector 402 until the first side 610 of the flexible circuit board 600 abuts against the side surface of the positioning table 4028. After the first side surface 610 abuts against the limiting table 4028, the pad on the flexible circuit board 600 is welded to the second pin 4027 of the second assembling surface 4026 on the platform 4023, so that the flexible circuit board 600 is electrically connected with the electrical connector 402.

The application provides an optical module, set up spacing platform on the electric connector is located the outside shell wall of transmission casing, the thickness dimension of spacing platform is just the size of the flexible circuit board welding optimum position width A when the performance of light eye pattern Margin is best, when the light emission side flexible circuit board welds in batches, directly push up the terminal surface of flexible circuit board to the spacing platform of electric connector upper housing wall, can be simple quick completion flexible circuit board's welding alignment problem, thereby let flexible circuit board weld in batches align simpler, the uniformity of flexible circuit board welding performance has been ensured, the defective rate of light eye pattern has been reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims

1. A light module, comprising:

a circuit board;

2. The light module of claim 1, wherein the protrusion comprises a first protrusion and a second protrusion, and a gap exists between the first protrusion and the second protrusion.

3. The optical module according to claim 2, wherein the first protrusion includes a first connection surface, the first side surface is connected to the second side surface through the first connection surface, and a side surface of the first protrusion opposite to the first connection surface is flush with a side wall of the flexible circuit board;

the second is protruding to include the second and is connected the face, first side pass through the second connect the face with the second side is connected, the second protruding go up with the second connect the face relative side the opposite side wall parallel and level of flexible circuit board.

4. The light module of claim 1, wherein a distance between the first side surface and the second side surface is 0.2 mm.

5. The optical module according to claim 1, wherein the pins on the platform extend from the housing wall in a direction toward the flexible circuit board, and a predetermined distance exists between an end of the pins facing away from the flexible circuit board and the housing wall.

6. The optical module according to claim 1, wherein one end of the electrical connector inside the emission housing is provided with a first groove and a second groove, and the first groove is recessed in the second groove;

and a laser is arranged in the transmitting shell and is electrically connected with the bonding pads on the first groove and the second groove through routing.

7. A light module, comprising:

a circuit board;

the light emitting assembly is electrically connected with the flexible circuit board and comprises an emitting shell and an electric connector, one end of the electric connector is inserted into the emitting shell, and the other end of the electric connector is positioned outside the emitting shell; a limit table extending towards the flexible circuit board is arranged on the shell wall of the electric connector, the distance between the limit table and the shell wall towards the side of the flexible circuit board is a preset value, and the side of the limit table towards the flexible circuit board is abutted against the first side; the shell wall is provided with a platform extending towards the flexible circuit board, the platform is provided with pins, the pad is electrically connected with the pins, and a preset distance exists between the pad and the shell wall.

8. The optical module of claim 7, wherein the limiting platform is disposed on the platform, and the pin extends from the limiting platform toward the flexible circuit board.

9. The optical module of claim 8, wherein the pin is flush with an edge of the land facing the side of the land facing the flexible circuit board.

10. The optical module of claim 7, wherein the stop block comprises a first stop block and a second stop block, and a gap exists between the first stop block and the second stop block.