WO2022083040A1

WO2022083040A1 - Optical module

Info

Publication number: WO2022083040A1
Application number: PCT/CN2021/077502
Authority: WO
Inventors: 刘旭霞; 王旭东; 付深圳; 杨思更; 林晓彤; 李雪健; 何鹏; 刘璐; 董玉婷
Original assignee: 青岛海信宽带多媒体技术有限公司
Priority date: 2020-10-19
Filing date: 2021-02-23
Publication date: 2022-04-28

Abstract

An optical module: a first lens assembly (400) and a circuit board (300) form a first accommodating cavity; the first accommodating cavity is provided in succession from bottom to top with a light-emitting chip array (310) and a first collimating lens array (320), and the surface of the first lens assembly (400) is provided with a first reflective surface (411) and a second converging reflective surface (412); a third reflective surface (413) is provided on the inner upper wall of the first accommodating cavity; the third reflective surface (413) is a coating layer, and is arranged in parallel with the first reflective surface (411); and the coating layer comprises a plurality of filtering film layers distributed in parallel. The first reflective surface (411) and the third reflective surface (413) provided by the first lens assembly (400) complete the combining of multiple beams of signal light of different wavelengths, thereby improving the coupling accuracy when coupling multiple channels in the optical module.

Description

an optical module

This disclosure requires the priority to be submitted to the China Patent Office on October 19, 2020, with the application number 202011120982.X and the patent name "An Optical Module", and is required to be submitted to the China Patent Office on October 19, 2020, with the application number It is the priority of 202011120978.3, the patent name is "an optical module", and the priority is required to be submitted to the Chinese Patent Office on October 19, 2020, the application number is 202011120975.X, and the patent name is "an optical module". The entire contents of this disclosure are incorporated by reference.

technical field

The present disclosure relates to the technical field of optical communication, and in particular, to an optical module.

Background technique

One of the core links of optical fiber communication is the mutual conversion of optical and electrical signals. Optical fiber communication uses information-carrying optical signals to transmit in information transmission equipment such as optical fibers/optical waveguides. The passive transmission characteristics of light in optical fibers/optical waveguides can realize low-cost, low-loss information transmission; while computers and other information processing equipment Electrical signals are used. In order to establish an information connection between information transmission equipment such as optical fibers/optical waveguides and information processing equipment such as computers, it is necessary to realize the mutual conversion of electrical signals and optical signals.

At present, the optical module is an important component of the modern optical communication network. It provides a Gbit high-speed data physical channel for the communication network, and the optical transmitting device and the optical receiving device are the core components of the optical module. With the rapid construction and upgrade of the current data center network, data centers have put forward demands on optical modules such as multi-wavelength channels, high speed, small size, and low cost.

SUMMARY OF THE INVENTION

In a first aspect, an embodiment of the present application discloses an optical module device, comprising: a circuit board; a light emitting chip array, disposed on the circuit board, for emitting signal light of different wavelengths; a first collimating lens array, The first lens assembly is arranged on the light-emitting direction of the light emitting chip, and is used for condensing the signal light; the first lens assembly is covered above the collimating lens array, and forms a first accommodating cavity with the circuit board; wherein: the The top of the lens assembly is provided with a first reflection surface and a second converging reflection surface; the first reflection surface is an inclined surface; a third reflection surface is arranged on the inner upper wall of the first accommodating cavity, and the third reflection surface is a coating film the first reflective surface; the coating layer includes a plurality of filter film layers; the signal light enters the first lens component through different filter film layers, and passes through the first reflective surface and the reflection and beam combination of the third reflecting surface; the second converging reflecting surface is arranged on one side of the first reflecting surface, and is used for converging and reflecting the combined signal light to the first optical fiber array; A lens assembly is provided with a first optical fiber array fixing hole for fixing the first optical fiber array.

In a second aspect, an embodiment of the present application further provides an optical module, including: a circuit board; a second lens assembly, covered above the circuit board, and forming a second accommodating cavity with the circuit board; wherein: the The top of the lens assembly is provided with a fourth reflection surface and a fifth converging reflection surface; the fourth reflection surface is an inclined surface; a sixth reflection surface is arranged on the inner upper wall of the second accommodation cavity, and the sixth reflection surface is connected to the The fourth reflecting surface is arranged in parallel; the sixth reflecting surface includes a plurality of filter film layers; the fifth converging reflecting surface is used for converging and reflecting the signal light and transmitting it to the sixth reflecting surface; The six reflective surfaces cooperate with the fourth reflective surface for beam splitting and reflection; a light-receiving chip array is arranged on the circuit board for receiving signal light of different wavelengths; a second collimating lens array is arranged on the light The light incident direction of the receiving chip is used for condensing the signal light; the second lens assembly is provided with a second optical fiber array fixing hole for fixing the second optical fiber array.

In a third aspect, an embodiment of the present application discloses an optical module device, comprising: a circuit board; a light emitting chip array, disposed on the circuit board, for emitting signal light of different wavelengths; a first collimating lens array, The first lens assembly is arranged on the light-emitting direction of the light emitting chip, and is used for condensing the signal light; the first lens assembly is covered above the collimating lens array, and forms a first accommodating cavity with the circuit board; wherein: the The top of the lens assembly is provided with a first reflection surface and a second converging reflection surface; the first reflection surface is an inclined surface; a third reflection surface is arranged on the inner upper wall of the first accommodating cavity, and the third reflection surface is a coating film the first reflective surface; the coating layer includes a plurality of filter film layers; the signal light enters the first lens component through different filter film layers, and passes through the first reflective surface and the reflection and beam combination of the third reflecting surface; the second converging reflecting surface is arranged on one side of the first reflecting surface, and is used for converging and reflecting the combined signal light to the first optical fiber array; A lens assembly is provided with a first optical fiber fixing hole for fixing the first optical fiber array.

In a fourth aspect, an embodiment of the present application further provides an optical module, including: a circuit board; a second lens assembly, covered above the circuit board, and forming a second accommodating cavity with the circuit board; wherein: the The top of the lens assembly is provided with a fourth reflection surface and a fifth converging reflection surface; the fourth reflection surface is an inclined surface; a sixth reflection surface is arranged on the inner upper wall of the second accommodation cavity, and the sixth reflection surface is connected to the The fourth reflecting surface is arranged in parallel; the sixth reflecting surface includes a plurality of filter film layers; the fifth converging reflecting surface is used for converging and reflecting the signal light and transmitting it to the sixth reflecting surface; The six reflective surfaces cooperate with the fourth reflective surface for beam splitting and reflection; a light-receiving chip array is arranged on the circuit board for receiving signal light of different wavelengths; a second collimating lens array is arranged on the light The light incident direction of the receiving chip is used for condensing the signal light; the second lens assembly is provided with a second optical fiber fixing hole for fixing the second optical fiber array.

In a fifth aspect, an embodiment of the present application discloses an optical module device, comprising: a circuit board; a light emitting chip array, disposed on the circuit board, for emitting signal light of different wavelengths; a first collimating lens array, The first lens assembly is arranged on the light-emitting direction of the light emitting chip, and is used for condensing the signal light; the first lens assembly is covered above the collimating lens array, and forms a first accommodating cavity with the circuit board; wherein: the The top of the lens assembly is provided with a first reflection surface and a second converging reflection surface; the first reflection surface is an inclined surface; a third reflection surface is arranged on the inner upper wall of the first accommodating cavity, and the third reflection surface is a coating film the first reflective surface; the coating layer includes a plurality of filter film layers; the signal light enters the first lens component through different filter film layers, and passes through the first reflective surface and the Reflection and beam combining of the third reflecting surface; the second converging reflecting surface is arranged on one side of the first reflecting surface, and is used for converging and reflecting the combined signal light to the first optical fiber array; the first optical fiber A bracket is inserted into the first lens assembly for fixing the first optical fiber array.

In a sixth aspect, the present application further provides an optical module, including: a circuit board; a second lens assembly, which is covered and disposed above the circuit board and forms a second accommodating cavity with the circuit board; wherein: the lens assembly A fourth reflecting surface and a fifth converging reflecting surface are arranged at the top of the second accommodating cavity; the fourth reflecting surface is an inclined surface; Four reflecting surfaces are arranged in parallel; the sixth reflecting surface includes a plurality of filter film layers; the fifth converging reflecting surface is used for converging and reflecting the signal light and transmitting it to the sixth reflecting surface; The light-receiving chip array is arranged on the circuit board to receive signal light of different wavelengths; the second collimating lens array is arranged on the light-receiving chip The second lens assembly is provided with a second optical fiber fixing hole for fixing the second optical fiber array.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative work, the Additional drawings can be obtained from these drawings.

Fig. 1 is a schematic diagram of the connection relationship of optical communication terminals;

Fig. 2 is a schematic diagram of the structure of an optical network unit;

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

FIG. 4 is a schematic diagram of an exploded structure of an optical module provided by an embodiment of the present application;

5 is a schematic structural diagram of an optical module provided by an embodiment of the present application after removing the upper casing, the lower casing and the unlocking component;

6 is a schematic diagram of a partially exploded structure of an optical module according to an embodiment of the present application;

FIG. 7 is a partial optical path diagram of an optical module light emission process provided by an embodiment of the present application;

FIG. 8 is a first structural schematic diagram of a first lens assembly and a first collimating lens array according to an embodiment of the present application;

9 is a cross-sectional view 1 of a first lens assembly and a first collimating lens array according to an embodiment of the present application;

10 is a structural diagram 1 of a first collimating lens array provided by an embodiment of the present application;

FIG. 11 is a second structural schematic diagram of a first lens assembly and a first collimating lens array according to an embodiment of the application;

FIG. 12 provides a second cross-sectional view of a first lens assembly and a first collimating lens array;

FIG. 13 is a second structural diagram of a first collimating lens array according to an embodiment of the application;

FIG. 14 is a perspective view 1 of a first lens assembly provided by an embodiment of the present application;

FIG. 15 is a second perspective view of a first lens assembly according to an embodiment of the application;

16 is a cross-sectional view 1 of a first lens assembly provided by an embodiment of the application;

FIG. 17 is a schematic exploded schematic diagram 1 of a first lens assembly structure provided by an embodiment of the present application;

18 is a second cross-sectional view of a first lens assembly provided by an embodiment of the application;

FIG. 19 is a schematic diagram of the main body structure of a first lens assembly provided by an embodiment of the present application;

FIG. 20 is a schematic structural diagram 1 of a first optical fiber array according to an embodiment of the present application;

FIG. 21 is a schematic structural diagram of a first optical fiber fixing hole according to an embodiment of the application;

FIG. 22 is a second schematic structural diagram of a first optical fiber array provided by an embodiment of the present application;

23 is a perspective view one of the structure of a first lens assembly and an optical fiber support provided in an embodiment of the application;

24 is a second perspective view of the structure of a first lens assembly and an optical fiber support provided in an embodiment of the application;

FIG. 25 is a three-dimensional view of the structure of a first lens assembly and an optical fiber support provided in an embodiment of the application;

26 is an exploded structural diagram of a second lens assembly and a second collimating lens array provided by an embodiment of the application;

27 is a structural diagram of yet another second lens assembly and a second collimating lens array provided by an embodiment of the present application;

FIG. 28 is a partial light path diagram of an optical module for light emission and reception according to an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

The optical module realizes the mutual conversion function of the above-mentioned optical and electrical signals in the technical field of optical fiber communication, and the mutual conversion of the optical signal and the electrical signal is the core function of the optical module. The optical module realizes the electrical connection with the external host computer through the gold finger on its internal circuit board. The main electrical connections include power supply, I2C signal, data signal and grounding, etc. The electrical connection method realized by the gold finger has become the optical module. The mainstream connection method of the industry, based on this, the definition of pins on the gold finger has formed a variety of industry protocols/norms.

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

One end of the optical fiber 101 is connected to the remote server, and one end of the network cable 103 is connected to the local information processing device. 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 terminal 100 with the optical module 200 is completed.

The optical port of the optical module 200 is externally connected to the optical fiber 101, and a two-way optical signal connection is established with the optical fiber 101; the electrical port of the optical module 200 is externally connected to the optical network terminal 100, and a two-way electrical signal connection is established with the optical network terminal 100; The optical module realizes mutual conversion between optical signals and electrical signals, so as to establish an information connection between the optical fiber and the optical network terminal; in an embodiment of the present application, after the optical signal from the optical fiber is converted into an electrical signal by the optical module Input to the optical network terminal 100, the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input into the optical fiber.

The optical network terminal has an optical module interface 102, which is used to access the optical module 200 and establish a two-way electrical signal connection with the optical module 200; Signal connection; a connection is established between the optical module 200 and the network cable 103 through the optical network terminal 100. In an embodiment of the present application, the optical network terminal transmits the signal from the optical module to the network cable, and transmits the signal from the network cable to the optical network terminal. The optical network terminal acts as the host computer of the optical module to monitor the work of the optical module.

So far, the remote server has established a two-way signal transmission channel with the local information processing equipment through optical fibers, optical modules, optical network terminals and network cables.

Common information processing equipment includes routers, switches, electronic computers, etc.; the optical network terminal is the host computer of the optical module, providing data signals to the optical module and receiving data signals from the optical module. Common optical module host computers and optical lines terminal etc.

FIG. 2 is a schematic structural diagram of an optical network terminal. As shown in FIG. 2, the optical network terminal 100 has a circuit board 105, and a cage 106 is arranged on the surface of the circuit board 105; an electrical connector is arranged inside the cage 106 for connecting to the electrical port of an optical module such as a gold finger; The cage 106 is provided with a radiator 107 , and the radiator 107 has raised portions such as fins that increase the heat dissipation area.

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

The cage 106 is located on the circuit board, and the electrical connectors on the circuit board are wrapped in the cage, so that the interior of the cage is provided with electrical connectors; the optical module is inserted into the cage, the optical module is fixed by the cage, and the heat generated by the optical module is conducted to the cage. 106 and then diffuse through a heat sink 107 on the cage.

FIG. 3 is a schematic structural diagram of an optical module provided by an embodiment of the present application, and FIG. 4 is a schematic structural diagram of an exploded optical module provided by an embodiment of the present application. As shown in FIG. 3 and FIG. 4 , the optical module 200 provided in this embodiment of the present application includes an upper casing 201 , a lower casing 202 , an unlocking component 203 , a circuit board 300 , and an optical transceiver device.

The upper casing 201 is covered with the lower casing 202 to form a wrapping cavity with two openings; the outer contour of the wrapping cavity generally presents a square body. Two side plates are located on both sides of the main board and are vertically arranged with the main board; the upper shell includes a cover plate, and the cover plate is closed on the two side plates of the upper shell to form a wrapping cavity; the upper shell can also include a The two side walls on both sides of the cover plate and the two side walls vertically arranged with the cover plate are combined with the two side plates to realize that the upper casing is covered on the lower casing.

Specifically, the two openings may be openings (204, 205) at both ends in the same direction, or may be two openings in different directions; one of the openings is an electrical port 204, and the gold fingers of the circuit board protrude from the electrical port 204. , inserted into a host computer such as an optical network terminal; the other opening is an optical port 205, which is used for external optical fiber access to connect the optical transceiver devices inside the optical module; the circuit board 300, optical transceiver devices and other optoelectronic devices are located in the package cavity.

The combination of the upper casing and the lower casing is adopted, which facilitates the installation of the circuit board 300, the optical transceiver and other components into the casing, and the upper casing and the lower casing form the outermost encapsulation protection casing of the optical module; The upper casing and the lower casing are generally made of metal materials, which are conducive to electromagnetic shielding and heat dissipation; generally, the casing of the optical module is not made into an integral part, so that when assembling circuit boards and other devices, positioning parts, heat dissipation and electromagnetic shielding parts It cannot be installed and is not conducive to production automation.

The unlocking part 203 is located on the outer wall of the enclosing cavity/lower casing 202, and is used to realize the fixed connection between the optical module and the upper computer, or to release the fixed connection between the optical module and the upper computer.

The unlocking part 203 has an engaging part matched with the cage of the upper computer; pulling the end of the unlocking part can make the unlocking part move relatively on the surface of the outer wall; the optical module is inserted into the cage of the upper computer, and the optical module is moved by the engaging part of the unlocking part. It is fixed in the cage of the upper computer; by pulling the unlocking part, the engaging part of the unlocking part moves with it, thereby changing the connection relationship between the engaging part and the upper computer, so as to release the engaging relationship between the optical module and the upper computer, so that the The optical module is pulled out from the cage of the host computer.

The circuit board 300 is provided with a light-emitting chip, a driving chip for the light-emitting chip, a light-receiving chip, a transimpedance amplifying chip, a limiting amplifying chip, a microprocessor chip, etc., wherein the light-emitting chip and the light-receiving chip are directly mounted on the light-emitting chip. On the circuit board of the module, this form is called COB (chip on board) package in the industry.

The circuit board connects the electrical components in the optical module according to the circuit design through the circuit wiring, so as to realize the electrical functions such as power supply, electrical signal transmission and grounding.

The circuit board is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the bearing function. For example, the rigid circuit board can carry the chip smoothly; when the optical transceiver is located on the circuit board, the rigid circuit board can also provide Stable bearing; the rigid circuit board can also be inserted into the electrical connector in the upper computer cage. In an embodiment of the present application, metal pins/gold fingers are formed on one end surface of the rigid circuit board for connecting with Electrical connector connections; these are inconvenient to implement with flexible circuit boards.

The optical transceiver device includes two parts, an optical emitting part and an optical receiving part, which are respectively used to realize the transmission of optical signals and the reception of optical signals. The light-emitting part and the light-receiving part may be combined together, or may be independent of each other. This application mainly takes the light emitting component as an example for introduction.

FIG. 5 is a schematic structural diagram of the optical module provided by the embodiment of the present application after removing the upper casing, the lower casing and the unlocking part. Schematic. As shown in FIG. 6 , a schematic diagram of a partially exploded structure of an optical module provided by an embodiment of the present application is shown.

As shown in FIG. 5 , the light emitting chip array 310 is disposed on the circuit board 300 for emitting signal light of different wavelengths. In an embodiment of the present application, in this embodiment, the light emitting chip array 310 is defined as a row along the length direction of the circuit board 300 ; and as a column along the length direction of the circuit board 300 . In order to realize the combination of light of different wavelengths, a plurality of light-emitting chips of different wavelengths are arranged in the same row, and this application takes 4 as an example; the same column can be light-emitting chips of different wavelengths, or light-emitting chips of the same wavelength can be set . The number of columns of the light emitting chip array 310 may be 1 column, 2 columns, 3 columns or 4 columns, which may be set according to actual needs of the optical module. In this embodiment, the light emitting chip array 310 is set in a 4-row 4-array mode.

In an embodiment of the present application, as shown in FIG. 6 , a schematic diagram of a partially exploded structure of an optical module provided in an embodiment of the present application. In some embodiments, in the optical module provided by the embodiments of the present application, the first lens assembly 400 and the circuit board 300 form a first receiving cavity that wraps the optical chip assembly, and the direction from the circuit board 300 to the first lens assembly 400 is The light emitting chip array 310 and the first collimating lens array 320 are arranged in sequence.

The first collimating lens assembly 320 is covered above the light emitting chip array 310 , and the number of lenses in the first collimating lens array 320 depends on the number of chips in the light emitting chip array 310 . Generally, the number of lenses of the first collimating lens assembly 320 is equal to the number of chips in the light emitting chip array 310 . In order to realize the installation of the first collimating lens assembly 320 , the first collimating lens array 320 is provided with a collimating lens bracket, and the collimating lens bracket is connected and fixed to the circuit board 300 .

FIG. 7 is a partial light path diagram of the light emission process of the optical module provided by the embodiment of the present application. With reference to FIG. 7 , the signal light emitted by the light emission chip array 310 is scattered light, and after passing through the first collimating lens array 320, a parallel light beam is formed, The first lens assembly 400 is illuminated. In this embodiment, the first collimating lens array 320 has 4 rows and 4 columns, and the setting of the rows and columns is consistent with the directions of the rows and columns of the light emitting chip array.

The first lens assembly 400 is disposed on the circuit board 300, and is disposed above the light emitting chip array in a cover-up manner. The first lens assembly 400 and the circuit board 300 form a first accommodating cavity for wrapping the light emitting chip array. The signal light emitted by the light emitting chip array is reflected and concentrated by the first lens assembly and then enters the optical fiber array. The first lens assembly not only plays the role of sealing the optical chip, but also establishes the optical connection between the optical chip and the optical fiber. The first lens assembly is used to transmit the light beam and change the transmission direction of the light beam during the transmission process. In use: the light emitted by the light emitting chip in the light emitting chip array is transmitted and reflected by the first lens assembly and then enters the optical fiber. optical connection between.

High-speed data transmission requires close proximity between the optical chip and its driver/matching chip, so as to shorten the connection between the chips and reduce the signal loss caused by the connection, and the first lens assembly 400 is covered above the optical chip. , so the first lens assembly generally covers the optical chip and its driving/matching chip at the same time. Therefore, the light emitting chip and the driving chip of the light emitting chip are arranged close to each other, and the first lens assembly covers the light emitting chip and the driving chip of the light emitting chip; the light receiving chip and the transimpedance amplifying chip are arranged close to each other, and the first lens assembly covers the Light receiving chip and transimpedance amplifying chip.

The size of each optical chip is generally small, and the size of the driver/matching chip of the optical chip is generally large, especially the driver/matching chip that achieves a rate of more than 100G, while the size of the first lens assembly is limited, the optical chip and its driver There are certain restrictions on the setting position of the /matching chip, and there is not much spatial freedom.

In an embodiment of the present application, FIG. 8 provides a first structural schematic diagram of a first lens assembly and a first collimating lens array. FIG. 9 provides a first cross-sectional view of a first lens assembly and a first collimating lens array, and FIG. 10 is a first structural view of a first collimating lens array. As shown in FIG. 8 , FIG. 9 and FIG. 10 , the first collimating lens array 320 is a support-type structure. The first lens assembly 400 is covered above the circuit board 300 . The first lens assembly 400 and the circuit board 300 are assembled to form a closed cavity. The first collimating lens array 320 and the light emitting chip array 310 are disposed in the cavity.

In a certain embodiment of the present application, the support-type structure may be as shown in the figure, including pillars arranged symmetrically and a flat plate arranged between the pillars, and a collimating lens is arranged on the flat plate. The flat plate can be disposed on the top of the pillar, and the other end of the pillar is fixedly connected to the circuit board 300 , so that a certain gap is formed between the first collimating lens array 320 and the circuit board 300 , leaving space for the arrangement of the light emitting chip array 310 .

The support structure can be a split structure or an integrated structure. In order to facilitate the assembly process and avoid the mismatch between the collimating lens and the optical path of the optical chip, the first collimating lens array 320 is integrally formed to ensure the distance between the first collimating lens array 320 and the circuit board 300, and at the same time to ensure The position between the flat plate and the pillar is kept accurate to avoid errors during installation by personnel, which is beneficial to improve the stability of the optical path of the entire optical module.

FIG. 11 provides a second structural schematic diagram of a first lens assembly and a first collimating lens array. FIG. 12 provides a second cross-sectional view of a first lens assembly and a first collimating lens array; FIG. 13 is a second structural view of a first collimating lens array.

11 , 12 and 13 , the first collimating lens array 320 is a flat plate structure, and the bottom end of the first lens assembly 400 has a first bearing surface 423 and a second bearing surface 422 . The first bearing surface 423 is used for bearing one end of the first collimating lens array 320 , and the second bearing surface 422 is used for bearing the other end of the first collimating lens array 320 . The positions of the lenses in the first collimating lens array 320 correspond to the positions of the optical chips, and are not necessarily arranged at the center of the first collimating lens array.

The flat-panel structure of the first collimating lens array 320 can be set as a horizontal I-shape, and both ends are placed horizontally on the corresponding bearing surface. The straight lenses are arranged on the surface of the main body plate in the form of an array.

In an embodiment of the present application, in order to facilitate the assembly of the first collimating lens array 320 and the first lens assembly 400, the first bearing surface 423 and the second bearing surface 422 of the first lens assembly 400 and the first lens assembly The side of the first lens assembly 400 is connected, so that the package cavity formed after the first lens assembly 400 is assembled with the circuit board 300 is not completely sealed, an opening is provided on the side of the first lens assembly 400, and the first collimating lens array 320 The position is inserted from the outside of the first lens assembly 400 to the inside.

14 is a perspective view 1 of a first lens assembly provided by an embodiment of the application; FIG. 15 is a perspective view 2 of a first lens assembly provided by an embodiment of the application; FIG. 16 is a first lens provided by an embodiment of the application Component sectional view 1; FIG. 17 is an exploded schematic view 1 of the first lens component provided by the embodiment of the application.

14 and 15 , the first lens assembly 400 includes: a first reflection surface 411 , a second converging reflection surface 412 , a third reflection surface 413 , and a first optical fiber fixing hole 414 . The first reflecting surface 411 and the second converging reflecting surface 412 are disposed on the top surface of the first lens assembly 400 . The first reflection surface 411 is an inclined surface, and the inclination angle of the upper surface of the first lens assembly 400 is consistent with that of the first reflection surface 411 .

A third reflective surface 413 is provided on the inner upper wall of the first accommodating cavity. The third reflective surface 413 is a coating layer and is arranged parallel to the first reflective surface 411 . The signal light enters the third reflective surface 143 through different positions of the coating layer, and is then reflected toward the third reflective surface 413 through the first reflective surface 411 to realize the beam combining of signal lights of different wavelengths. The coating layer is provided with a plurality of filter film layers, and signal lights of different wavelengths are injected into the first lens assembly 400 through different filter film layers.

The arrangement of the filter film layers corresponds to the arrangement of the light emitting chips, so as to realize the beam combining of light of different wavelengths. For example, if 4 light emitting chips with different wavelengths are arranged in the same row in the light emitting chip array, the coating layer needs to be arranged with corresponding 4 different filter film layers. In an embodiment of the present application, if the same column of the light-emitting chip array is the light-emitting chip with the same wavelength, the filter film layer in the same column is the same sub-film layer, or a whole column covering the entire column direction. film layer. If the same column of the light emitting chip array is the light emitting chips of different wavelengths, the same column of the filter film layer has different sub-film layers. Usually, in order to simplify the production process, light emitting chips of the same wavelength are arranged in the same column in the light emitting chip array. As shown in FIG. 16 , the second converging reflection surface 412 is an inclined surface, and is provided with an arc-shaped convex portion, and the arc-shaped convex portion protrudes toward the outside of the first lens assembly 400 , and the second converging and reflecting surface 412 is disposed on the first lens assembly 400 . A reflective surface 411 is away from one side of one end of the circuit board 300 , and the second converging reflective surface 412 is provided with an arc-shaped protrusion. The second converging reflection surface 412 is disposed between the first reflecting surface 411 and the first optical fiber fixing hole 414 for transmission of the combined signal light between the second converging reflection surface 412 and the first optical fiber array 500 . The surface of the second converging and reflecting surface in the present application is arc-shaped, so that the second converging and reflecting surface 420 can have a converging function, and no additional converging lens is required.

With reference to FIG. 7 , in the light emitting device, the light emitting chip array 310 is a plurality of lasers. The embodiment of the present application takes a row of four light emitting chips as an example, and the signal light of four wavelengths emitted by the laser is condensed into parallel light through the first collimating lens assembly 320 . The four parallel light beams are respectively incident on different filter film layers of the third reflecting surface 413, and cooperate with the first reflecting surface 411. After multiple reflections, the four parallel light beams are incident on the second converging reflecting surface 412, and the second converging reflecting surface 412 The light beam is reflected and converged and transmitted to the first optical fiber array 500, and the position of the optical fiber hole matches the position of the light beam converging spot to ensure that the spot can reach the first optical fiber array to complete the coupling and transmission of light.

The wavelength of the first light emitted by the first laser 311 is , the wavelength of the second light emitted by the second laser 312 is , the wavelength of the third light emitted by the third laser 313 is for. The third reflective surface 413 is provided with a first filter film layer 4131, a second filter film layer 4132, a third filter film layer 4133, and a fourth filter film layer 4134, which respectively allow only the light beams of the corresponding wavelengths to pass through, while the light beams of other wavelengths are filtered. reflection.

The first outgoing light rays are converged by the first collimating lens array 320 to form a parallel beam, and reach the first filter film layer 4131 , which can allow light with a wavelength of 100 Å to pass through. The first outgoing light is slightly refracted in the first filter film layer 4131 and then transmitted to the first reflection surface 411 , reflected by the first reflection surface 411 and transmitted to the second filter film layer 4132 , and the second filter film layer 4132 occurs. secondary reflection.

The second outgoing light emitted by the second laser 312 has a wavelength of light passes through. After entering the first lens assembly 400, the second outgoing light and the first outgoing light are combined for the first time to form a combined light. Then, according to the light path diagram, it is sequentially combined with the third outgoing light and the fourth outgoing light to form a final combined light.

After the final combined light beam is reflected and converged by the second converging reflection surface 412 , it is transmitted to the first optical fiber array 500 . In order to improve the light coupling precision, the end face of the first fiber array 500 is set at the converging focus position of the second converging reflection surface 412 , and the center line of the first fiber array 500 coincides with the center light of the second converging reflection surface 412 . After the signal light finally generated by the signal light is transmitted to the second converging reflection surface 420 , it is reflected by the second converging and reflecting surface 420 and then condensed into the first optical fiber array.

In an embodiment of the present application, in order to realize multiple reflections of light between the first reflection surface and the third reflection surface, the light can be transmitted in sequence, and the first reflection surface 411 is a total reflection surface.

The inclination angle of the third reflection surface is consistent with the inclination angle of the top plate of the first lens assembly 400 , and the angle is related to the spacing between optical chips of different wavelengths, and is generally between 4° and 17°.

In some embodiments, in order to realize the transmission of the light beam between the first collimating lens array 320 and the second converging reflecting surface 412, a certain angle is set between the first reflecting surface 411 and the plane of the circuit board 300, and the light beam passes through multiple reflections, The transmission of light beams between the first collimating lens array 320 and the second converging reflection surface 412 is realized.

In an embodiment of the present application, FIG. 18 provides a second schematic exploded view of the structure of a first lens assembly; FIG. 19 provides a schematic diagram of the main structure of a first lens assembly. As shown in FIGS. 18 and 19 , the first lens assembly 400 includes a support body 420 and a main body 410 . The main body 410 is provided with a first reflecting surface 411 , a second converging reflecting surface 412 , a third reflecting surface 413 , a first optical fiber fixing hole 414 , and a first cavity 440 . The first reflecting surface 411 and the second converging reflecting surface 412 are disposed on the upper surface of the main body 410 . The first reflection surface 411 is an inclined surface, and the inclination angle of the upper surface of the main body 410 is the same.

The support body 420 is covered on the circuit board 300 and is inserted and fixed with the main body 410 . The support body 420 may be a rectangular cylinder with a hollow interior formed by four brackets connected end to end and enclosed. The support body 420 is provided with a plurality of fixing holes 421 . The bottom surface of the main body 410 is provided with a plurality of positioning columns 415 , and the fixing holes 421 match the positions and sizes of the positioning columns 415 to realize the insertion of the fixing holes 421 and the positioning columns 415 .

In an embodiment of the present application, two fixing holes 421 may be provided on the support body 420 , which are respectively located at diagonally opposite corners of the support body 420 . In order to facilitate the assembly connection between the main body 410 and the support body 420 and the stability after assembly, the connection surface of the main body 410 and the support body 420 is a plane disposed parallel to the circuit board 300 . Then, the main body 410 forms the first cavity 440 . In an embodiment of the present application, in order to ensure the integrity of the coating layer during the coating process of the third reflective surface 413, the vertical height of the first cavity 440 cannot be too large. Therefore, the first cavity 440 of the main body 410 has a small space and cannot accommodate the light emitting chip array 310 and the first collimating lens array 320. The second cavity 430 inside the support body 420 is used for accommodating the light emitting chip array 310 and the first collimating lens array 320. Collimating lens array 320 . The second cavity 430 communicates with the first cavity 440 to ensure the transmission of signal light.

FIG. 19 is a schematic diagram of a main body structure of a first lens assembly according to an embodiment of the present application. The third reflection surface 413 is disposed on the bottom surface of the main body 410. In order to realize the beam combining or beam splitting effect of the optical module on the signal light, the third reflection surface 413 is a coating layer. Different wavelengths of signal light are filtered. Or the third reflective surface 413 is a plurality of filters distributed in parallel, and the filters are connected with the bottom surface of the main body through optical glue. The third reflective surface 413 is disposed parallel to the first reflective surface 411 , and the projection of the third reflective surface 413 in the direction of the circuit board 300 covers the optical chip assembly, so that the third reflective surface 413 can receive all the signal light emitted or received by the optical chip. The projection of the first reflective surface 411 in the direction of the circuit board 300 covers the third reflective surface 413 , so that the first reflective surface can process all signal light rays to prevent signal loss.

In an embodiment of the present application, the main body 410 and the support body 420 of the first lens assembly 400 are respectively integrally formed, so that the position and size between the first optical fiber fixing hole 414 and the second converging reflection surface 412 are very stable, improving the The connection accuracy between components is improved, thereby improving the coupling accuracy when coupling multiple channels in COB technology.

In an embodiment of the present application, the first lens assembly 400 may also be an integral structure, and the integral molding structure has high precision to avoid errors in the assembly process, so that the first optical fiber fixing hole 414 and the second converging reflection surface 412 The position and size between them are very stable, which improves the connection accuracy between components, thereby improving the coupling accuracy when coupling multiple channels in COB technology.

The end face of the first optical fiber array 500 is set at the converging focal position of the second converging and reflecting surface 412 , and the center line of the first optical fiber array 500 coincides with the center light of the second converging and reflecting surface 412 to ensure beam coupling accuracy. The position of the first optical fiber positioning hole is consistent with the position of the light beam converging spot to ensure that the light spot can reach the first optical fiber array to complete the coupling and transmission of light.

FIG. 20 is a schematic structural diagram 1 of a first optical fiber array provided by an embodiment of the application; FIG. 21 is a schematic structural diagram of a first optical fiber fixing hole provided by an embodiment of the application. 20 and 21, in order to ensure the positional relationship between the first optical fiber array 500 and the second converging reflection surface 412, so that the position of the first optical fiber array 500 is stable, the first optical fiber fixing hole 414 includes: a first installation The groove 4141, the second installation groove 4142, the first installation groove 4141 and the second installation groove 4142 communicate with each other.

The first optical fiber array 500 includes: an inner core 510 , a cladding layer 520 and a sheath 530 ; the cladding layer 520 is arranged between the inner core 510 and the sheath 530 , and the first installation groove 4141 matches the cladding layer 520 of the first optical fiber array 500 Setting; the second installation groove 4142 is matched with the sheath 530 . The first optical fiber fixing hole 414 is fixedly connected to the first optical fiber array 500 through optical glue. In order to prevent the first optical fiber array 500 from being bent and affecting the service life of the first optical fiber array, the first installation groove 441 and the second installation groove 442 are coaxially arranged.

In an embodiment of the present application, in some embodiments, as shown in FIG. 22 , the second schematic structural diagram of the first optical fiber array is another angular structural schematic diagram of the first optical fiber array 500 . In order to bind the plurality of optical fibers into a whole, the outer layer of the first optical fiber array 500 is provided with a concentrating rubber sleeve 540 for gathering the plurality of optical fibers. The first optical fiber fixing hole 414 further includes: a third installation groove 443 , and the third installation groove 443 is matched with the hub rubber sleeve 540 . In order to prevent the first optical fiber array 500 from being bent during the installation process and affecting the service life of the first optical fiber array, the first installation groove 4141, the second installation groove 4142, and the third installation groove 4143 are coaxially arranged, so that the first optical fiber array The part in the first optical fiber fixing hole is arranged in a straight line to avoid bending and affecting the service life, and the first lens assembly 400 is integrally formed as a whole, the position of the light fixing hole is very stable, and the first optical fiber array and the second convergent reflection The distance between the faces 412 is fixed.

In order to facilitate the connection and fixation of the first optical fiber array 500 and the first optical fiber fixing hole 414, transition grooves are respectively provided between the first installation groove 4141, the second installation groove 4142, and the third installation groove 4143, and the outer edge of the transition groove is formed by an installation groove. It is inclined to the adjacent installation slot, so that the transition between the first installation slot 4141, the second installation slot 4142, and the third installation slot 4143 is smooth, so as to avoid the contact dead angle between the single first optical fiber array and the installation slot during the insertion process, which will affect the insertion The connection effect is ensured; it is ensured that the end face of the first optical fiber array is set at the converging focus of the second converging reflection surface 412, so as to improve the light coupling accuracy.

At the same time, after the first optical fiber array 500 is plugged and matched with the first optical fiber fixing hole 414, there is a certain gap in the transition groove, so colloid is added to the gap for fixing the first optical fiber array 500 and the first optical fiber fixing hole 414.

In an embodiment of the present application, in order to avoid affecting the transmission of the signal beam in the first lens assembly 400 , the glue added in the gap part is optical glue, which is ensured between the first optical fiber array 500 and the first optical fiber fixing hole 414 While the connection is fixed, the transmission of signal light is ensured.

The embodiment of the present application also provides another connection manner of the first optical fiber array and the first lens assembly. 23 is a first perspective view of the structure of a first lens assembly and an optical fiber support provided by an embodiment of the application, FIG. 24 is a perspective view of the structure of a first lens assembly and an optical fiber support provided by an embodiment of the application, and FIG. 25 is an implementation of the application Example 3 provides a perspective view of the structure of a first lens assembly and an optical fiber support. With reference to FIG. 23 , FIG. 24 and FIG. 25 , the optical module further includes: a first optical fiber support 600 . The first optical fiber holder 600 includes: a holder positioning hole 601 and a first optical fiber slot 602 . The bracket positioning holes 601 are arranged on the side surface of the first optical fiber bracket 600 and are respectively arranged at both ends of the side surface. The first lens assembly 400 is provided with a bracket positioning column 417 , which matches the position and size of the bracket positioning hole 601 . During assembly, the bracket positioning column 415 is inserted into the bracket positioning hole 601 to realize the connection between the first optical fiber bracket 600 and the first lens assembly 400 .

In an embodiment of the present application, in order to facilitate assembly, the bottom surface of the first optical fiber holder 600 is provided with a guide groove 603 , and the first lens assembly 400 is provided with a guide rail 416 to match the guide groove 603 . When assembling, the operator can first match the guide rail 416 with the guide groove 603, and then push the first optical fiber holder 600 to the first lens assembly 400 to install, which can avoid assembly deviation, and at the same time, the guide rail 416 and the guide groove 603 cooperate with each other. , making the assembly easier.

The upper surface of the first fiber support 600 is provided with a first fiber slot 602 for carrying the first fiber array 500 . In an embodiment of the present application, in order to realize the connection between the first optical fiber array 500 and the first optical fiber support 600, the side of the first optical fiber support 600 is provided with an optical fiber hole 604 for fixing the end face of a single optical fiber and ensuring the The end face is arranged at the converging focal point of the second converging reflection surface to improve the coupling precision.

The optical module provided by the present application can realize multi-wavelength channels, independent optical paths emitted by lasers of different wavelengths, and realize the function of combining multiple optical paths. The first lens assembly is provided with a first optical fiber fixing hole for positioning the first optical fiber array. Wherein, the first lens assembly is an integral molding structure. Because it is mass-produced by an integral molding die, the position and size of the hole relative to the second converging reflection surface are very stable, and this design is both precise and easy to assemble. The alignment of the optical path and the first optical fiber array can be completed in a very simple process, the optical coupling is completed, and the optical coupling accuracy is improved.

Next, the light receiving member will be described.

In the embodiment of the present application, the structure of the second lens assembly 400A is similar to or the same as that of the first lens assembly 400 . For the convenience of description, the lens assembly in light emission is defined as the first lens assembly, and the lens assembly in light reception is defined as the second lens assembly. An exploded structural diagram of a collimating lens array; FIG. 27 is a structural diagram of yet another second lens assembly and a second collimating lens array according to an embodiment of the present application. As shown in FIG. 26 or 27 , the second lens assembly 400A and the circuit board 300 form a second accommodating cavity, and the second accommodating cavity is used for arranging optical devices. In an embodiment of the present application, a light-receiving chip array 310A and a second collimating lens array 320A are sequentially arranged in the second accommodating cavity from the circuit board 300 to the top. And, the top surface of the second lens assembly 400A is provided with a fourth reflection surface 411A and a fifth converging reflection surface 412A. A sixth reflection surface 413A is provided on the inner upper wall of the second accommodating cavity, and the sixth reflection surface 413A is arranged in parallel with the fourth reflection surface 411A. The sixth reflection surface 413A includes a plurality of filter film layers.

The light-receiving chip array 310A includes a plurality of light-receiving chips for receiving multiple beams of signal light with different wavelengths, wherein the light-receiving chips are arranged in an array, and the light-receiving chips are arranged in the length direction and the width direction of the circuit board. , wherein one row of light-receiving chips in the length direction is set as one group, so that multiple groups of light-receiving chips can be set.

The second collimating lens array 320A includes several collimating lenses for the signal light output by the second lens assembly 320A. The structure of the second collimating lens array 320A is similar to or the same as that of the first collimating lens array 320 . The second collimating lens array 320A is covered above the light-receiving chip array 310A, and the number of lenses in the second collimating lens array 400A depends on the number of light-receiving chips in the light-receiving chip array 310A. Generally, the number of lenses of the second collimating lens array 400A is equal to the number of light receiving chips in the light receiving chip array 310A.

The structure of the sixth reflection surface 413A is the same as or similar to that of the third reflection surface 413 , and the sixth reflection surface 413A includes a plurality of filter film layers distributed in parallel. In the embodiment of the present application, the sixth reflective surface 413A uses different film layers arranged at different positions to transmit and reflect the signal light of different wavelengths to split a signal light including different wavelengths into multiple light beams. The sixth reflection surface 413A selects the number of reflections of the signal light of each wavelength in coordination according to the wavelength type and the number of the divided beams.

In an embodiment of the present application, a beam of signal light with different wavelengths outside the optical module is transmitted to the second lens assembly 400A, and the beam of signal light is reflected by the fifth converging and reflecting surface 412A and then condensed to the sixth reflecting surface 413A . The light beam of one wavelength is incident on the corresponding collimating lens through the sixth reflecting surface 413A, and the light beam of the remaining wavelength is reflected to the fourth reflecting surface 411A. After being reflected by the fourth reflecting surface 411A to the sixth reflecting surface 413A, the light beam of another wavelength passes through the sixth reflecting surface 413A, and the light beam of the remaining wavelength is reflected to the fourth reflecting surface 411A, thus completing a beam of signal light with different wavelengths The signal light is divided into multiple beams of different wavelengths, which are collimated by the second collimating lens array 320A and then transmitted to the light receiving chips in the light receiving chip assembly in turn, so as to realize the function of the optical module receiving signal light of multiple wavelengths in a single fiber. .

FIG. 28 is a partial light path diagram of an optical module for light emission and reception according to an embodiment of the present application. In the light-receiving device, the light-receiving chip array 310A is a plurality of light-receiving chips. The embodiment of the present application takes four light receiving chips in a row as an example.

A bundle of signal light with different wavelengths outside the optical module is transmitted to the second lens assembly 400A, and the bundle of signal light is reflected by the fifth converging reflection surface 412A and then condensed to the sixth reflection surface 413A. The beam of signal light includes four wavelengths of signal light, λ1, λ2, λ3 and λ4. Since the light is reversible, it is reflected and filtered through the sixth reflecting surface 413A and the fourth reflecting surface 411A, so as to complete a beam splitting including signal light of different wavelengths.

For the details of the second lens assembly 400A in the embodiments of the present application, reference may be made to the first lens assembly 400 . The second collimating lens array 320A has the same structure as the first collimating lens array 320; the second optical fiber array has the same structure as the first optical fiber array 500, and can refer to each other.

In the optical module provided by the present application, the structures of the first lens assembly 400 and the second lens assembly 400A in the light emission process and the light reception process are completely consistent, and the photodetectors and lasers can be arranged in an array in sequence, which can save space. The light emitting device and the light receiving device are arranged in the same lens assembly, which improves the space utilization rate, reduces the number of optical module components, and simplifies the assembly process.

The lens assembly is also covered above the light-emitting chip array or the light-receiving chip array, which facilitates changing the propagation direction of the signal light emitted by the light-emitting chip or the signal light from outside the optical module by using fewer components. In the embodiments of the present application, the light-emitting chip array and the light-receiving chip array may be covered by the first lens assembly and the second lens assembly, respectively; and may also be covered by the same lens assembly. Furthermore, in the embodiment of the present application, the number of columns of the first lens array may be one, or two, or the like.

When the light-emitting chip array and the light-receiving chip array are covered by the same lens assembly, the same collimating lens array and the same fiber array can also be used at the same time. It is only necessary to set the optical chips in the light-emitting chip array and the light-receiving chip array in one-to-one correspondence with the corresponding filter film layers in the lens assembly as required.

In the optical module provided by the present application, the first lens assembly and the circuit board form a first accommodating cavity, and the first accommodating cavity is sequentially provided with a light emitting chip array and a first collimating lens array from bottom to top, and the surface of the first lens assembly is A first reflecting surface and a second converging reflecting surface are provided, a third reflecting surface is set on the inner upper wall of the first accommodating cavity, and the third reflecting surface is a coating layer and is arranged in parallel with the first reflecting surface; the coating layer includes Multiple filter film layers. The light emitting chip array includes a plurality of light emitting chips, and the light emitting chip array can emit multiple beams of signal light with different wavelengths. At this time, the signal light is in a scattered state, and is collimated and focused by the first collimating lens array to form parallel light. , and multiple beams of parallel light with different wavelengths are transmitted to the film layer of the third reflective surface. The light beam of one wavelength is transmitted to the first reflecting surface through a filter film layer of the third reflecting surface, and is totally reflected by the first reflecting surface to another filter film layer of the third reflecting surface. At this time, the light beam of another wavelength is After passing through another filter film layer of the third reflecting surface, it is combined with the reflected beam and then transmitted to the first reflecting surface, and is totally reflected by the first reflecting surface to the third reflecting surface, repeating the previous beam combining to complete multiple different beams The signal light of the wavelength is combined to finally generate a bundle of signal light, which is reflected by the second converging reflection surface and then converged into the optical fiber ribbon to realize the simultaneous transmission of signal light of multiple wavelengths in a single fiber. In the optical module provided by the present application, only the first reflection surface and the third reflection surface provided by the first lens assembly are used to complete the beam combining of multiple signal lights of different wavelengths, which improves the coupling accuracy when coupling multiple channels in the optical module. .

In the optical module provided by the present application, the second lens assembly and the circuit board form a second accommodating cavity, the light receiving chip assembly and the second collimating lens array are arranged in sequence from bottom to top in the cavity, and the top surface of the second lens assembly is provided with a fourth reflecting surface and a fifth converging reflecting surface; a sixth reflecting surface is provided on the inner upper wall of the second accommodating cavity, and the sixth reflecting surface is arranged in parallel with the fourth reflecting surface; the sixth reflecting surface includes a plurality of filter layer. A beam of signal light with different wavelengths outside the optical module is transmitted to the second lens assembly, the signal light is reflected by the fifth converging reflecting surface and then converged to the sixth reflecting surface, wherein the beam of one wavelength passes through the sixth reflecting surface, The light beam of the remaining wavelength is reflected to the fourth reflecting surface, and is reflected to the sixth reflecting surface through the fourth reflecting surface. The light beam of another wavelength passes through the sixth reflecting surface, and the light beam of the remaining wavelength is reflected to the fourth reflecting surface. The beam of signal light with different wavelengths is demultiplexed into multiple beams of signal light with different wavelengths, which are sequentially transmitted to the light-receiving chips in the light-receiving chip array after passing through the second collimating lens array, so that the optical module can receive multiple wavelengths in a single fiber. The function of signal light. In the optical module provided by the present application, only the fourth reflection surface and the sixth reflection surface provided by the second lens assembly are used to complete a beam of signal light with different wavelengths, which improves the coupling when coupling multiple channels in the optical module. precision.

Meanwhile, the present application also provides an implementation manner in which the light-emitting chip array and the light-receiving chip array are arranged in the same lens assembly.

Since the above embodiments are all cited and combined with other modes for description, different embodiments all have the same parts, and the same and similar parts among the various embodiments in this specification can be referred to each other. It will not be elaborated here.

Reference throughout this specification to "embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, component, or characteristic described in connection with the embodiment is included in at least one in the examples. Thus, appearances of the phrases "in various embodiments", "in some embodiments", "in at least another embodiment" or "in an embodiment", etc. throughout this specification are not necessarily all referring to the same Example. Furthermore, the particular features, components or characteristics may be combined in any suitable manner in one or more embodiments. Thus, without limitation, particular features, components or characteristics illustrated or described in connection with one embodiment may be combined in whole or in part with features, components or characteristics of one or more other embodiments. Such modifications and variations are intended to be included within the scope of this application.

It should be noted that, in this specification, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and are not necessarily required or implied Any such actual relationship or ordering exists between these entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a circuit structure, article or device comprising a list of elements includes not only those elements, but also not expressly listed Other elements, or elements inherent to such a circuit structure, article, or device are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the circuit structure, article or device that includes the element.

Other embodiments of the present application will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of this application that follow the general principles of this application and include common knowledge or conventional techniques in the technical field not disclosed in this application . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the application being indicated by the content of the claims.

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

Claims

An optical module, characterized by comprising: a circuit board;

an array of light emitting chips, arranged on the circuit board, for emitting signal light of different wavelengths;

a first collimating lens array, arranged in the light-emitting direction of the light-emitting chip, for condensing the signal light;

a first lens assembly, covered above the collimating lens array, and forming a first accommodating cavity with the circuit board;

Wherein: the top of the first lens assembly is provided with a first reflecting surface and a second converging reflecting surface; the first reflecting surface is an inclined surface;

A third reflective surface is arranged on the inner upper wall of the first accommodating cavity, and the third reflective surface is a coating layer and is arranged in parallel with the first reflective surface; the coating layer includes a plurality of filter film layers;

The signal light enters the first lens assembly through different filter film layers, and is reflected and combined by the first reflecting surface and the third reflecting surface;

The second converging reflection surface is arranged on one side of the first reflection surface, and is used for converging and reflecting the combined signal light to the first optical fiber array;

The first lens assembly is provided with a first optical fiber array fixing hole for fixing the first optical fiber array.
The optical module according to claim 1, wherein the first lens assembly is a split structure, and the first lens assembly comprises: a support body and a main body; the support body is covered on the circuit board, and is connected to the circuit board. The main body is inserted and fixed; the third reflection surface is arranged on the bottom surface of the main body.
The optical module according to claim 1, wherein the second converging reflection surface is disposed between the first reflecting surface and the first optical fiber fixing hole, and the end face of the optical fiber array is disposed in the first optical fiber fixing hole. the converging focus of the second converging reflective surface; the projection of the first reflective surface on the circuit board covers the third reflective surface; and the projection of the third reflective surface on the circuit board covers the light emission chip array.
The optical module according to claim 1, wherein the filter film layer corresponds to the light emitting chip array, and is used to achieve selective transmission of signal light of a corresponding wavelength.
The optical module according to claim 1, wherein the first optical fiber fixing hole comprises: a first installation slot, a second installation slot, and a third installation slot that are connected in sequence;

the first installation groove is plugged with the cladding of the first optical fiber array;

the second installation groove is inserted into the protective sleeve of the first optical fiber array;

The third installation groove is plugged with the hub rubber sleeve of the first optical fiber array.
An optical module, characterized by comprising: a circuit board;

a second lens assembly, covered above the circuit board, and forming a second accommodating cavity with the circuit board;

Wherein: the top of the lens assembly is provided with a fourth reflecting surface and a fifth converging reflecting surface; the fourth reflecting surface is an inclined surface; a sixth reflecting surface is set on the inner upper wall of the second accommodating cavity, and the sixth reflecting surface is surface, which is arranged in parallel with the fourth reflection surface; the sixth reflection surface includes a plurality of filter film layers;

The fifth converging reflection surface is used for converging and reflecting the signal light and transmitting it to the sixth reflecting surface; and then the sixth reflecting surface cooperates with the fourth reflecting surface for beam splitting and reflection;

a light-receiving chip array, arranged on the circuit board, for receiving signal light of different wavelengths;

The second collimating lens array is arranged in the light incident direction of the light receiving chip, and is used for condensing the signal light;

The second lens assembly is provided with a second fiber array fixing hole for fixing the second fiber array.
The optical module according to claim 6, wherein the second lens assembly is a split structure, and the second lens assembly comprises: a support body and a main body; the support body is covered on the circuit board, and is connected to the circuit board. The main body is inserted and fixed; the sixth reflection surface is arranged on the bottom surface of the main body.
The optical module according to claim 6, wherein the fifth converging reflection surface is arranged between the fourth reflection surface and the second optical fiber fixing hole, and the port of the optical fiber array is arranged in the the converging focus of the fifth converging reflecting surface; the projection of the fourth reflecting surface on the circuit board covers the sixth reflecting surface; and the projection of the sixth reflecting surface on the circuit board covers the light receiving chip array.
The optical module according to claim 6, wherein the filter film layer corresponds to the light-receiving chip array, and is used to realize selective transmission of the signal light of the corresponding wavelength.
The optical module according to claim 6, wherein the second optical fiber array fixing hole comprises: a fourth installation slot, a fifth installation slot, and a sixth installation slot that are connected in sequence;

The fourth slot is inserted into the cladding of the second optical fiber array;

the fifth installation groove is inserted into the protective sleeve of the second optical fiber array;

The sixth installation groove is plugged with the hub rubber sleeve of the second optical fiber array.
An optical module, characterized by comprising: a circuit board;

an array of light emitting chips, arranged on the circuit board, for emitting signal light of different wavelengths;

a first collimating lens array, arranged in the light-emitting direction of the light-emitting chip, for condensing the signal light;

The first straight lens assembly is a flat plate structure, the bottom end of the first lens assembly has a first bearing surface and a second bearing surface, and the first bearing surface is used to carry the first collimating lens array. one end, the second bearing surface is used to carry the other end of the first collimating lens array; the first lens assembly is covered above the collimating lens array and forms a first accommodating cavity with the circuit board;

Wherein: the top of the first lens assembly is provided with a first reflecting surface and a second converging reflecting surface; the first reflecting surface is an inclined surface;

A third reflection surface is arranged on the inner upper wall of the first accommodating cavity, and the third reflection surface is a coating layer and is arranged in parallel with the first reflection surface; the coating layer includes a plurality of filter film layers; the filter layer Corresponding to the light emitting chip array, it is used to realize the selective transmission of the signal light of the corresponding wavelength;

The signal light enters the first lens assembly through different filter film layers, and is reflected and combined by the first reflecting surface and the third reflecting surface;

The second converging reflection surface is arranged on one side of the first reflection surface, and is used for converging and reflecting the combined signal light to the first optical fiber array;

The first lens assembly is provided with a first fiber fixing hole for fixing the first fiber array.
The optical module according to claim 11, wherein the first lens assembly is a split structure, and the first lens assembly comprises: a support body and a main body; the support body is covered on the circuit board, and is connected to the circuit board. The main body is inserted and fixed; the third reflection surface is arranged on the bottom surface of the main body.
The optical module according to claim 11, wherein the second converging reflection surface is disposed between the first reflecting surface and the first optical fiber fixing hole, and the end face of the optical fiber array is disposed in the optical fiber array. the converging focus of the second converging reflective surface; the projection of the first reflective surface on the circuit board covers the third reflective surface; and the projection of the third reflective surface on the circuit board covers the light emission chip array.
The optical module according to claim 11, wherein the filter film layer corresponds to the light emitting chip array, and is used to achieve selective transmission of signal light of a corresponding wavelength.
The optical module according to claim 11, wherein the first optical fiber fixing hole comprises: a first installation groove, a second installation groove, and a third installation groove connected in sequence;

the first installation groove is plugged with the cladding of the first optical fiber array;

the second installation groove is inserted into the protective sleeve of the first optical fiber array;

The third installation groove is inserted into the hub rubber sleeve of the first optical fiber array.
An optical module, characterized by comprising: a circuit board;

a second lens assembly, covered above the circuit board, and forming a second accommodating cavity with the circuit board;

Wherein: the top of the lens assembly is provided with a fourth reflecting surface and a fifth converging reflecting surface; the fourth reflecting surface is an inclined surface; a sixth reflecting surface is set on the inner upper wall of the second accommodating cavity, and the sixth reflecting surface is surface, which is arranged in parallel with the fourth reflection surface; the sixth reflection surface includes a plurality of filter film layers;

The fifth converging reflection surface is used for converging and reflecting the signal light and transmitting it to the sixth reflecting surface; and then the sixth reflecting surface cooperates with the fourth reflecting surface for beam splitting and reflection;

a light-receiving chip array, arranged on the circuit board, for receiving signal light of different wavelengths;

The second collimating lens array is arranged in the light incident direction of the light receiving chip and is used for condensing the signal light; the second collimating lens array is a flat-plate structure, and the bottom end of the second lens assembly It has a third bearing surface and a fourth bearing surface, the third bearing surface is used to carry one end of the second collimating lens array, and the fourth bearing surface is used to carry the other end of the second collimating lens array. one end;

The second lens assembly is provided with a second optical fiber fixing hole for fixing the second optical fiber array.
The optical module according to claim 16, wherein the second lens assembly is a split structure, and the second lens assembly comprises: a support body and a main body; the support body is covered on the circuit board, and is connected to the circuit board. The main body is inserted and fixed; the sixth reflection surface is arranged on the bottom surface of the main body.
The optical module according to claim 16, wherein the fifth converging reflection surface is arranged between the fourth reflection surface and the second optical fiber fixing hole, and the port of the optical fiber array is arranged in the the converging focus of the fifth converging reflecting surface; the projection of the fourth reflecting surface on the circuit board covers the sixth reflecting surface; and the projection of the sixth reflecting surface on the circuit board covers the light receiving chip array.
The optical module according to claim 16, wherein the filter film layer corresponds to the light-receiving chip array, and is used to realize selective transmission of the signal light of the corresponding wavelength.
The optical module according to claim 16, wherein the second optical fiber fixing hole comprises: a fourth installation groove, a fifth installation groove, and a sixth installation groove connected in sequence;

The fourth slot is inserted into the cladding of the second optical fiber array;

the fifth installation groove is inserted into the protective sleeve of the second optical fiber array;

The sixth installation groove is plugged with the hub rubber sleeve of the second optical fiber array.
An optical module, characterized by comprising: a circuit board;

an array of light emitting chips, arranged on the circuit board, for emitting signal light of different wavelengths;

a first collimating lens array, arranged in the light-emitting direction of the light-emitting chip, for condensing the signal light;

a first lens assembly, covered above the collimating lens array, and forming a first accommodating cavity with the circuit board;

Wherein: the top of the first lens assembly is provided with a first reflecting surface and a second converging reflecting surface; the first reflecting surface is an inclined surface;

A third reflective surface is arranged on the inner upper wall of the first accommodating cavity, and the third reflective surface is a coating layer and is arranged in parallel with the first reflective surface; the coating layer includes a plurality of filter film layers;

The signal light enters the first lens assembly through different filter film layers, and is reflected and combined by the first reflecting surface and the third reflecting surface;

The second converging reflection surface is arranged on one side of the first reflection surface, and is used for converging and reflecting the combined signal light to the first optical fiber array;

The first optical fiber support is inserted into the first lens assembly and used for fixing the first optical fiber array.
The optical module according to claim 21, wherein the first lens assembly is a split structure, and the first lens assembly comprises: a support body and a main body; the support body is covered on the circuit board, and is connected to the circuit board. The main body is inserted and fixed; the third reflection surface is arranged on the bottom surface of the main body.
The optical module according to claim 21, wherein the second converging reflection surface is disposed between the first reflecting surface and the first optical fiber fixing hole, and the end surface of the optical fiber array is disposed in the optical fiber array. the converging focus of the second converging reflective surface; the projection of the first reflective surface on the circuit board covers the third reflective surface; and the projection of the third reflective surface on the circuit board covers the light emission chip array.
The optical module according to claim 21, wherein the filter film layer corresponds to the light emitting chip array, and is used to achieve selective transmission of signal light of a corresponding wavelength.
The optical module according to claim 21, wherein the first optical fiber support comprises:

The first bracket positioning hole is arranged on the side of the first optical fiber bracket; the first lens assembly is provided with a first bracket positioning column, which is matched and inserted with the first bracket positioning hole;

a first guide groove, which is arranged on the bottom surface of the first optical fiber support; a first guide rail is arranged on the first lens assembly; matched with the first guide groove;

The optical fiber hole is arranged on the side surface of the first optical fiber support, and is used for fixing the first optical fiber array.
An optical module, characterized by comprising: a circuit board;

a second lens assembly, covered above the circuit board, and forming a second accommodating cavity with the circuit board;

Wherein: the top of the second lens assembly is provided with a fourth reflecting surface and a fifth converging reflecting surface; the fourth reflecting surface is an inclined surface; the inner upper wall of the second accommodating cavity is provided with a sixth reflecting surface; Six reflecting surfaces are arranged in parallel with the fourth reflecting surface; the sixth reflecting surface includes a plurality of filter film layers;

The fifth converging reflection surface is used for converging and reflecting the signal light and transmitting it to the sixth reflecting surface; and then the sixth reflecting surface cooperates with the fourth reflecting surface for beam splitting and reflection;

a light-receiving chip array, arranged on the circuit board, for receiving signal light of different wavelengths;

The second collimating lens array is arranged in the light incident direction of the light receiving chip, and is used for condensing the signal light;

A second optical fiber support is inserted into the second lens assembly for fixing the second optical fiber array.
The optical module according to claim 26, wherein the second lens assembly is a split structure, and the second lens assembly comprises: a support body and a main body; the support body is covered on the circuit board, and is connected to the circuit board. The main body is inserted and fixed; the sixth reflection surface is arranged on the bottom surface of the main body.
The optical module according to claim 26, wherein the fifth converging reflection surface is arranged between the fourth reflection surface and the second optical fiber fixing hole, and the port of the optical fiber array is arranged in the the converging focus of the fifth converging reflecting surface; the projection of the fourth reflecting surface on the circuit board covers the sixth reflecting surface; and the projection of the sixth reflecting surface on the circuit board covers the light receiving chip array.
The optical module according to claim 26, wherein the filter film layer corresponds to the light-receiving chip array, and is used to realize the selective transmission of the signal light of the corresponding wavelength.
The optical module according to claim 26, wherein the second optical fiber support comprises:

The second bracket positioning hole is arranged on the side of the second optical fiber bracket; the second lens assembly is provided with a second bracket positioning column, which is matched and plugged with the second bracket positioning hole;

The second guide groove is arranged on the bottom surface of the second optical fiber support; the first lens assembly is provided with a first guide rail; matched with the first guide groove;

The secondary optical fiber hole is arranged on the side surface of the second optical fiber support, and is used for fixing the second optical fiber array.