WO2022083041A1 - Optical module - Google Patents

Abstract

An optical module, comprising: a circuit board (300); a first lens assembly (400) covering a light-emitting chip array (440), the surface of the first lens assembly having a first reflecting face (410) and a second reflecting face (420); the light-emitting chip array (440), which is arranged on the surface of the circuit board (300) and comprises a plurality of light-emitting chips for emitting multiple beams of signal light of different wavelengths; a first collimating lens array (450), which is arranged between the light-emitting chip array (440) and an optical multiplexing assembly (460) and comprises a plurality of collimating lenses for receiving the signal light from the light-emitting chips and converging same into parallel light; and the optical multiplexing assembly (460), which is arranged on the inner wall of the first lens assembly (400) and used to receive the signal light from the first collimating lens array (450), the signal light from the collimating lenses being incident on different positions of the optical multiplexing assembly (460), and combine the multiple beams of signal light of different wavelengths into one beam of signal light together with the first reflecting face (410), the combined signal light being transmitted to the second reflecting face (420), reflected by the second reflecting surface (420) and then emitted to an external optical fiber. Another optical module correspondingly comprises an optical demultiplexing assembly (560) and a light-receiving chip array (540). The above optical modules achieve the simultaneous transmission of signal light of multiple wavelengths in a single optical fiber, thereby increasing the transmission rate.

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 of 202011119875.5 and the patent name of "an optical module", and is required to be submitted to the China Patent Office on October 19, 2020, with the application number of 202011117865.8 , the priority of the patent name is "an optical module", it is required to be submitted to the Chinese Patent Office on October 19, 2020, the application number is 202011121035.2, and the priority of the patent name is "an optical module", which is required to be submitted in October 2020. The priority of the application number 202011119907.1 and the patent name "An Optical Module" was submitted to the Chinese Patent Office on May 19, the entire contents of which are incorporated in this disclosure by reference.

technical field

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

Background technique

With the development of new business and application models such as cloud computing, mobile Internet, and video, the development and progress of optical communication technology has become more and more important. In the optical communication technology, the optical module is a tool for realizing the mutual conversion of photoelectric signals, and it is one of the key components in the optical communication equipment. With the development of optical communication technology, the transmission rate of the optical module is continuously improved. Simultaneous transmission of optical signals of multiple wavelengths in an optical fiber can increase the transmission rate, so an optical module is required to realize the simultaneous transmission of signal lights of multiple wavelengths in a single optical fiber, thereby increasing the transmission rate.

SUMMARY OF THE INVENTION

In a first aspect, the present disclosure provides an optical module, comprising: a circuit board; a first lens assembly covered on a light emitting chip array, the surface having a first reflective surface and a second reflective surface; the light emitting chip array , which is arranged on the surface of the circuit board and includes a plurality of light emitting chips for emitting multiple beams of signal light with different wavelengths; the first collimating lens array is arranged between the light emitting chip array and the light multiplexing component, It includes a plurality of collimating lenses for receiving the signal light from the light emitting chip and condensing it into parallel light; the light multiplexing component is arranged on the inner wall of the first lens component and is used for receiving the signal light from the first collimating lens For the signal light of the array, the signal light from each collimating lens is incident on different positions of the optical multiplexing component, and together with the first reflecting surface, multiple beams of signal light with different wavelengths are combined into one signal light, and the combined beam is combined. The latter signal light is transmitted to the second reflection surface, reflected by the second reflection surface, and then emitted to an external optical fiber.

In a second aspect, the present disclosure provides an optical module, comprising: a circuit board; a second lens assembly, covered on the light emitting chip array, and having a third reflection surface and a fourth reflection surface on the surface, wherein the third reflection surface The surface is used to receive the signal light from the external optical fiber; the optical demultiplexing component is arranged on the inner wall of the second lens component, and is used to receive the signal light from the third reflecting surface, and reflect the light with the fourth reflecting surface. A beam of signal light is divided into multiple beams of signal light with different wavelengths together; the second collimating lens array, located between the light receiving chip array and the optical demultiplexing component, includes a plurality of collimating lenses for receiving The signal light emitted from different positions of the optical demultiplexing component is collected into parallel light; the light-receiving chip array is arranged on the surface of the circuit board, and includes a plurality of light-receiving chips, which are used for receiving light from the first light-receiving chip. Signal light from two collimating lens arrays.

In a third aspect, the present disclosure provides an optical module, comprising: a circuit board; a first lens assembly covered on the light emitting chip array, the surface has a first reflection surface and a second reflection surface, and the bottom ends are respectively provided with an inward first bearing surface and a second bearing surface; the light emitting chip array, disposed on the surface of the circuit board, includes a plurality of light emitting chips for emitting multiple beams of signal light with different wavelengths; The straight lens array is set as a flat structure, one end is placed on the first bearing surface, the other end is placed on the second bearing surface, and is arranged between the light emitting chip array and the light multiplexing component, including a plurality of The collimating lens is used for receiving the signal light from the light emitting chip and condensing it into parallel light; the light multiplexing component is arranged on the inner wall of the first lens component and is used for receiving the signal from the first collimating lens array The signal light from each collimating lens is incident on different positions of the optical multiplexing component, and together with the first reflecting surface, multiple beams of signal light with different wavelengths are combined into one signal light, and the combined signal The light is transmitted to the second reflective surface, reflected by the second reflective surface, and then emitted to an external optical fiber.

In a fourth aspect, the present disclosure provides an optical module, comprising: a circuit board; a second lens assembly covered on the light emitting chip array, the surface has a third reflection surface and a fourth reflection surface, and the bottom ends are respectively provided with The inward third bearing surface and the fourth bearing surface, wherein the third reflection surface is used to receive the signal light from the external optical fiber; the optical demultiplexing component is arranged on the inner wall of the second lens component, and is used to receive the signal light from the external optical fiber; The signal light of the third reflection surface, together with the fourth reflection surface, divides a beam of signal light into multiple signal beams of different wavelengths; the second collimating lens array is set as a flat structure, and one end is placed in the The first bearing surface, the other end of which is placed on the second bearing surface, is arranged between the light receiving chip array and the light demultiplexing component, and includes a plurality of collimating lenses for receiving the light from the light demultiplexer. The signal light emitted from different positions of the multiplexing component is collected into parallel light; the light-receiving chip array, disposed on the surface of the circuit board, includes a plurality of light-receiving chips for receiving the light from the second collimating lens array signal light.

In a fifth aspect, the present disclosure provides an optical module, comprising: a circuit board; a first lens assembly, covered on the light emitting chip array, the surface has a first reflection surface and a second reflection surface, and one end side is provided with a limit components; a first optical fiber support, one end side is provided with a docking component, and the docking component is inserted into the limiting component; the light emitting chip array is arranged on the surface of the circuit board, and includes a plurality of light emitting chips, which are used for for emitting multiple beams of signal light with different wavelengths; the first collimating lens array, located between the light emitting chip array and the light multiplexing component, includes a plurality of collimating lenses for receiving the signal light from the light emitting chip and Condensed into parallel light; the light multiplexing component is arranged on the inner wall of the first lens component, and is used for receiving the signal light from the first collimating lens array, and the signal light from each collimating lens is incident on the light complex Using different positions of the component and together with the first reflecting surface, multiple beams of signal light with different wavelengths are combined into one signal light; the first converging lens array includes a plurality of converging lenses for receiving the light multiplexing component. The combined signal light is converged into a convergent light spot and coupled into the first optical fiber holder.

In a sixth aspect, the present disclosure provides an optical module, comprising: a limiting member; a second optical fiber support, one end side is provided with a docking member, the abutting member is inserted into the limiting member; a second converging lens array, including a plurality of converging lenses for receiving the signal light from the second optical fiber support and converging the signal light to the third reflection surface; the light demultiplexing component is arranged on the inner wall of the second lens component, It is used to receive the signal light from the third reflection surface, and together with the fourth reflection surface, divide a beam of signal light into multiple beams of signal light with different wavelengths; the second collimating lens array is arranged on the light A plurality of collimating lenses are included between the receiving chip array and the optical demultiplexing component, which are used for receiving the signal light emitted from different positions of the optical demultiplexing component and condensing them into parallel light; the light receiving chip array is arranged on the The surface of the circuit board includes a plurality of light receiving chips for receiving the signal light from the second collimating lens array.

In a seventh aspect, the present disclosure provides an optical module, including a circuit board; an array of light emitting chips, arranged on the surface of the circuit board, divided into groups by rows or columns, and a plurality of light emitting chips in the group can emit multiple beams of different wavelengths The collimating lens array is arranged in the light-emitting direction of the light emitting chip array, and a single lens converges a single beam of light; the lens assembly is arranged on the circuit board, and is covered by the light emitting chip array and the collimating lens array above; the optical multiplexing component, which is arranged in the light-emitting direction of the collimating lens array, and is fixedly connected to the inner wall of the lens component for combining multiple beams of light into one beam; the optical fiber array, which is connected to the lens component, can receive a beam of light Light.

Description of drawings

In order to illustrate the technical solutions of the present disclosure more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Other drawings can also be obtained from these drawings.

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

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

FIG. 3 is a schematic structural diagram of an optical module provided in an embodiment of the present disclosure;

4 is a schematic diagram of an exploded structure of an optical module provided in an embodiment of the present disclosure;

5 is a schematic structural diagram of the first optical module provided by the embodiment of the present disclosure after removing the upper casing, the lower casing and the unlocking part;

6 is a perspective view of a first first lens assembly according to an embodiment of the present disclosure;

FIG. 7 is a schematic cross-sectional structural diagram of a first first lens assembly according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of an exploded structure of a first first lens assembly according to an embodiment of the present disclosure;

FIG. 9 is a use state diagram of a first lens assembly provided by an embodiment of the present disclosure;

FIG. 10 is a working principle diagram of an optical multiplexing component provided by an embodiment of the present disclosure;

11 is a schematic diagram of an exploded structure of a second optical module provided in an embodiment of the present disclosure;

12 is a schematic structural diagram of the second optical module provided by the embodiment of the present disclosure after removing the upper casing, the lower casing and the unlocking part;

13 is a perspective view of a second type of first lens assembly provided in an embodiment of the present disclosure;

FIG. 14 is a schematic cross-sectional structure diagram 1 of a second type of first lens assembly according to an embodiment of the present disclosure;

15 is a schematic diagram of an exploded structure of a second type of first lens assembly provided in an embodiment of the present disclosure;

16 is a schematic diagram of an exploded structure of a third optical module provided in an embodiment of the present disclosure;

FIG. 17 is a schematic cross-sectional structural diagram of a third first lens assembly according to an embodiment of the present disclosure;

FIG. 18 is a perspective view of a third first lens assembly according to an embodiment of the present disclosure;

FIG. 19 is an exploded view 1 of a third first lens assembly according to an embodiment of the present disclosure;

FIG. 20 is an exploded view 2 of a third first lens assembly according to an embodiment of the present disclosure;

FIG. 21 is an exploded structural diagram of a second lens assembly according to an embodiment of the present disclosure;

FIG. 22 is an exploded structural diagram of still another second lens assembly provided by an embodiment of the present disclosure;

FIG. 23 is a schematic diagram of an exploded structure of a second lens assembly according to an embodiment of the present disclosure;

FIG. 24 is a working principle diagram of an optical demultiplexing component provided by an embodiment of the present disclosure.

Detailed ways

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

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.

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, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input. To the optical network terminal 100, 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 module. , the optical network terminal is used as the host computer of the optical module to monitor the work of the optical module.

So far, the remote server has established a bidirectional signal transmission channel with the local information processing device through the optical fiber 101 , the optical module 200 , the optical network terminal 100 and the network cable 103 .

Common information processing equipment includes routers, switches, electronic computers, etc.; the optical network terminal 100 is the host computer of the optical module 200, provides data signals to the optical module 200, and receives data signals from the optical module 200. There are also optical line terminals and so on.

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 in the cage 106 for connecting to the electrical port of an optical module such as a golden finger; The cage 106 is provided with a radiator 107, and the radiator 107 has a raised structure such as fins to increase the heat dissipation area.

The optical module 200 is inserted into the optical network terminal, specifically, the electrical port of the optical module is inserted into the electrical connector in the cage 106 , and the optical port of the optical module 200 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; the optical module 200 is inserted into the cage, the optical module 200 is fixed by the cage, and the heat generated by the optical module 200 is conducted to the cage through the optical module housing, and finally Diffusion takes place through heat sinks 107 on the cage.

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

The upper casing 201 is covered with the lower casing 202 to form a wrapping cavity with two openings, and the outer contour of the wrapping cavity generally presents a square shape. In an embodiment of the present disclosure, the lower case 202 includes a main board and two side plates located on both sides of the main board and perpendicular to the main board; the upper case 201 includes a cover plate, and the cover plate covers the two sides of the upper case 201 two side plates to form a wrapping cavity; the upper casing 201 may also include two side walls located on both sides of the cover plate and perpendicular to the cover plate, and the two side walls are combined with the two side plates to realize the upper The casing 201 is covered with the lower casing 202 .

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 the electrical port 204, and the gold finger of the circuit board 300 extends from the electrical port 204. The other opening is the optical port 205, which is used for external optical fiber access to connect the optical transceiver device inside the optical module 200. The circuit board 300, the optical transceiver device and other optoelectronic devices are located in the package cavity. middle.

The combination of the upper casing 201 and the lower casing 202 is adopted to facilitate the installation of components such as the circuit board 300 into the casing, and the upper casing 201 and the lower casing 202 form the outermost packaging protection casing of the optical module. The upper casing 201 and the lower casing 202 are generally made of metal materials, which are conducive to electromagnetic shielding and heat dissipation; generally, the casing of the optical module 200 is not made into an integrated structure, so that when assembling circuit boards and other devices, positioning components, heat dissipation and The electromagnetic shielding structure 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 structure matched with the cage of the upper computer; the end of the unlocking part 203 can be pulled to relatively move the unlocking part 203 on the surface of the outer wall; Fix the optical module in the cage of the host computer; by pulling the unlocking part 203, the engaging structure of the unlocking part 203 moves with it, thereby changing the connection relationship between the engaging structure and the host computer to release the optical module and the host computer. relationship, so that the optical module can be 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 package in the industry.

The circuit board 300 connects the electrical components in the optical module according to the circuit design through circuit wiring, so as to realize the electrical functions such as power supply, electrical signal transmission and grounding; at the same time, the circuit board 300 also has the functions of various components carried, such as circuit The board carries the lens assembly.

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; 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 the electrical connector.

In the embodiment of the present disclosure, the optical module further includes a lens assembly, and the lens assembly is disposed on the circuit board 300 . In an embodiment of the present disclosure, the lens assembly and the circuit board 300 form a cavity enclosing the light emitting chip array or the light receiving chip array, and the light emitting chip array or the light receiving chip array is located in the cavity. The lens assembly is used to transmit the light beam and change the direction of the beam transmission during the transmission process. In use: the light emitted by the optical chip in the light emitting chip array is transmitted and reflected by the lens assembly and then enters the optical fiber; or, the light from the optical fiber enters the light receiving chip after being reflected by the lens assembly, and the lens assembly not only functions to seal the optical chip It also establishes the optical connection between the optical chip and the optical fiber. 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 embodiment of the present disclosure, the light-emitting chip array is covered by the lens assembly, or the light-receiving chip array is covered by the lens assembly, or the light-emitting chip array and the light-receiving chip array can be covered by the lens assembly respectively. Furthermore, in the embodiment of the present disclosure, the number of lens components may be one, or two, or the like.

In the embodiment of the present disclosure, the lens assembly may not only be disposed at one end of the circuit board 300 close to the optical port, but also may be disposed in the middle of the circuit board 300, which may be selected according to the actual needs of the optical module. In the embodiment of the present disclosure, the lens assembly is disposed above the light-emitting chip array or the light-receiving chip array in a cover-up manner; wherein: the light-emitting chip array includes several light-emitting chips, and usually each light-emitting chip is used for The signal light of one wavelength is emitted, and then the light-emitting chip array is used to emit multiple beams of signal light of different wavelengths; the light-receiving chip array includes several light-receiving chips, and usually each light-receiving chip is used to receive one wavelength of signal light. , and the light-receiving chip array is used for receiving different multiple beams of signal light with different wavelengths. The light-emitting chip array includes 2, 3, and 4 light-emitting chips, and the light-receiving chip array includes 2, 3, and 4 light-receiving chips. Light emitting chips or light receiving chips are divided into groups by rows or columns, multiple light emitting chips in the group can emit multiple beams of optical signals of different wavelengths, and multiple light receiving chips in the group receive light of one wavelength respectively; the present disclosure The light-emitting chips or light-receiving chips are arranged in an array structure, in which one row of light-emitting chips or light-receiving chips arranged along the length direction of the circuit board is set as a group, and multiple rows of light-emitting chips or light-receiving chips are arranged along the width direction of the circuit board. Chips, multi-row light-emitting chips or light-receiving chips are set to multiple groups. Refer to Figure 4 for the definition of the length direction and width direction of the circuit board. In Figure 4, the direction from left to right is defined as the length direction of the circuit board, and it is defined from top to bottom. is the width direction of the circuit board.

In this embodiment, two lens assemblies are included. For the convenience of description, one lens assembly is referred to as a first lens assembly, and the other lens assembly is referred to as a second lens assembly. The lens assembly on the chip array is called the first lens assembly, and the lens assembly covered on the light-receiving chip array is called the second lens assembly.

In an embodiment of the present disclosure, high-speed data transmission requires close proximity between optical chips and their driving/matching chips in a light-emitting chip array or light-receiving assembly, so as to shorten the connection between chips and reduce the number of connections. When the lens assembly is installed above the optical chip, the lens assembly generally covers the optical chip and its driving/matching chip at the same time. Therefore, in the light-emitting chip array, the light-emitting chip and the driving chip of the light-emitting chip are arranged in close proximity, and the lens assembly covers the light-emitting chip and the driving chip of the light-emitting chip; The lens assembly covers the light receiving chip and the transimpedance amplifying chip.

In order to facilitate the transmission of multiple beams of signal light of different wavelengths emitted by the light-emitting chip array and the reception of signal light of different wavelengths by the light-receiving chip array, the embodiments of the present disclosure include other optical devices and lens assemblies. The following is a detailed description in conjunction with the specific use of the lens assembly.

The light emitting structure will be described below.

In the first embodiment, the present disclosure provides the structure of an optical module and its corresponding optical device; FIG. 5 is a schematic structural diagram of the optical module in the embodiment of the disclosure after removing the upper casing, the lower casing and the unlocking components. As shown in FIG. 5 , the first lens assembly 400 is connected to one end of the optical fiber array 900 , and the other end of the optical fiber array 900 is connected to the optical fiber adapter 600 , through which the optical fiber adapter 600 realizes optical connection with external optical fibers. The first lens assembly 400 is disposed on the circuit board 300 . The first lens assembly 400 and the circuit board 300 form a wrapping cavity. For the convenience of description, the wrapping cavity is described as a first accommodating cavity. One end of the optical fiber adapter 600 is connected to the internal optical fiber, and the other end is connected to the external optical fiber, and the internal optical fiber and the external optical fiber are connected through the optical fiber adapter 600 .

6 is a perspective view of a first first lens assembly provided by an embodiment of the present disclosure; FIG. 7 is a schematic cross-sectional structural diagram of a first first lens assembly provided by an embodiment of the present disclosure; A schematic diagram of an exploded structure of a first lens assembly; as shown in FIGS. 6-8 , the first lens assembly 400 is usually a transparent plastic part, which is generally injection-molded in one piece. The first lens assembly 400 and the circuit board 300 form a first accommodating cavity 430, and the first accommodating cavity 430 is used for arranging optical devices. There are a light emitting chip array 440 , a collimating lens array 450 and a light multiplexing component 460 . Also, the top surface of the first lens assembly 400 is provided with a first reflection surface 410 and a second reflection surface 420 . The first reflection surface 410 is used for reflecting the signal light incident thereon, and the second reflection surface 420 is used for reflecting and condensing the signal light reflected thereon into the optical fiber ribbon.

The light emitting chip array 440 includes a plurality of light emitting chips for emitting multiple beams of signal light with different wavelengths, and the collimating lens array 450 includes several collimating lenses for collimating the signal light of the light emitting chip array. The light-emitting chip array is divided into groups by rows or columns, and multiple light-emitting chips in the group can emit multiple beams of light signals of different wavelengths; the collimating lens array is arranged in the light-emitting direction of the light-emitting chip array. The beams of light are converged. The collimating lens array 450 is covered above the light emitting chip array 440. The number of lenses in the collimating lens array 450 depends on the number of light emitting chips in the light emitting chip array 440. The number of light emitting chips in the emitting chip array 440 .

In order to realize the photocombination, it can be realized by the optical multiplexing component alone. The light multiplexing component is arranged in the light-emitting direction of the collimating lens array, and is fixedly connected to the inner wall of the lens component, and is used to combine multiple beams of light into one beam; It is used to combine multiple signal lights of different wavelengths into one signal light.

The surface of the optical multiplexing component facing the collimating lens array is a filtering surface, and the surface facing the lens component includes a main body reflective surface and a light-transmitting surface; multiple different positions of the filtering surface respectively transmit a plurality of single beams of light from the collimating lens array; the main body reflects The filter surface can reflect the light from the filter surface to the filter surface; the filter surface can reflect the light from the main body reflection surface; the light transmission surface can transmit the light from the filter surface; the filter surface and the main body reflection surface can combine multiple beams into one beam Light;

The optical multiplexing component 460 usually includes a plurality of filters, and the filter surfaces are formed by the plurality of filters; the filters use different film layers on both sides and different positions to allow the transmission of signal light of a specific wavelength and signal light of other wavelengths. The filter surface in the optical multiplexing component 460 allows the reflection of the signal light of a certain wavelength, and the optical multiplexing component 460 coordinately selects the number of reflections of each beam according to the number of beams to be combined, and finally realizes the combination of different wavelengths of signal light. bundle.

In order to realize beam combination, it can also be realized by the cooperation of the lens component and the optical multiplexing component. The surface of the optical multiplexing component facing the collimating lens array is a filtering surface, and the surface facing the lens component is a light-transmitting surface; the upper surface of the lens component includes a first reflecting surface; multiple different positions of the filtering surface respectively transmit the light from the collimating lens array. a single beam of light; the light-transmitting surface can transmit the light from the filtering surface and the first reflecting surface; the first reflecting surface can reflect the light from the filtering surface to the filtering surface; the filtering surface can reflect the light from the first reflecting surface; The filtering surface and the first reflecting surface cooperate to realize that the multiple beams of light are combined into one beam of light.

The lens assembly further includes an inclined second reflecting surface, and the second reflecting surface is provided with a converging lens array, which can condense and reflect the light from the light multiplexing assembly to the optical fiber array. The first reflective surface 410 is an inclined surface for reflecting the signal light incident thereon, and the second reflective surface is disposed close to the light-emitting direction for reflecting and converging the signal light incident thereon into the optical fiber of the optical module; When the first lens assembly 400 is assembled and fixed on the circuit board 300, the first reflective surface 410 and the circuit board form a certain angle, that is, they are inclined. The thicknesses of the emission chip and the optical multiplexing component 460 are related. In an embodiment of the present disclosure, the inclination angle of the first reflecting surface 410 and the optical multiplexing component 460 is selected between 4° and 17°. In an embodiment of the present application, the projection of the light multiplexing component 460 in the direction of the circuit board covers the light emitting chips in the light emitting chip array 440, the projection of the first reflective surface 410 in the direction of the circuit board covers the light multiplexing component 460, and the light For the signal light emitted by the light emitting chips in the emitting chip array 440, the light signals emitted by the light emitting chips are in a diverging state, and are diverging light beams. In order to facilitate the subsequent optical path design and optical coupling into the optical fiber, the divergent beam needs to be converged. In the present disclosure, the diverging light beams are converged into parallel light beams by a collimating lens, and after being converged by the collimating lenses in the collimating lens array 450, they are sequentially transmitted to the optical multiplexing component 460 and the first reflecting surface 410. The light is incident on different positions of the optical multiplexing component 460. The first reflecting surface 410 receives the signal light from the optical multiplexing component 460 and then changes the propagation direction of the light to reflect it to the surface of the optical multiplexing component 460. The signal light of this wavelength is combined with the optical multiplexing component. The signal light at other positions of 460 is combined and incident on the first reflecting surface 410, and finally the signal light of different wavelengths is combined into a beam of light, which is transmitted to the second reflecting surface 420. The second reflecting surface 420 changes the propagation direction of the light and finally converts the beam. The light is emitted to the outside of the optical module, and the signal light of different wavelengths can share one optical fiber to transmit out of the optical module, so that the signal light of multiple wavelengths in a single optical fiber can be transmitted at the same time.

The first reflection surface 410 is a total reflection surface, and the signal light emitted by the light emitting chip is transmitted to the first reflection surface 410 for total reflection.

The second reflection surface 420 is set as an inclined surface. After the combined signal light is transmitted to the second reflection surface 420, the second reflection surface 420 needs to realize reflection and convergence at the same time. , a plurality of convex structures can be arranged on the surface of the second reflecting surface 420, the inclined surface of the second reflecting surface 420 has the function of reflecting the signal light, and the convex structure can realize the function of concentrating the signal light; One end of the reflective surface is connected to the first reflective surface, and the other end is connected to a converging lens, that is, the first lens component includes a converging lens at this time, and the converging effect is achieved by arranging the converging lens.

In the embodiment of the present disclosure, the surface of the circuit board 300 has a bearing surface, which can carry a plurality of light emitting chips. The light emitting chips are arranged in an array. One row of light-emitting chips in the upper direction is set as one group, so that multiple groups of light-emitting chips can be set. For the definition of the length direction and width direction of the circuit board, refer to Figure 4. The direction in Figure 4 is defined as the length direction of the circuit board from left to right. From top to bottom is defined as the board width direction. As shown in FIG. 9 , the collimating lens array 450 in the embodiment of the present disclosure is a support type structure, including a main board and a side board supporting the main body, the side board is arranged on the circuit board, and the main board is provided with a convex array capable of condensing light ; The structure can carry a plurality of collimating lenses, and the support structure has strong stability and good collimation effect; wherein the support structure can specifically include a main board and two side plates arranged on both sides of the main board, the main board and the two sides After the board is assembled, a support structure is formed, the two side boards are in contact with the circuit board, and a plurality of collimating lenses are arranged on the surface of the main board. Arranged in the form of an array, collimating lenses are arranged in the length direction and width direction of the circuit board, and a row of collimating lenses in the length direction is set as one group, so that multiple groups of collimating lenses can be set, and the length and width of the circuit board are related. For the definition of the width direction, refer to FIG. 4 . In FIG. 4 , the direction from left to right is defined as the length direction of the circuit board, and the direction from top to bottom is defined as the width direction of the circuit board. Multiple sets of collimating lenses receive the signal light from the light emitting chip, and perform condensing processing on each signal light, so as to condense the signal light in the divergent state into parallel beams.

As shown in FIG. 8 , one end of the first lens assembly 400 close to the light outlet is provided with a wrapping cavity, and the wrapping cavity has an optical fiber socket 401. The optical fiber socket includes: a first connection part 401a, which is used for plugging with the optical fiber cladding; The second connecting portion 401b is used for plugging with the optical fiber protective layer; the third connecting portion 401c has a accommodating cavity, which can accommodate and wrap each optical fiber ribbon through the hub member, and then insert the hub member into the accommodating cavity of the third connecting portion 401c , wherein the hub component may be a sleeve wrapping the optical fiber ribbons, each optical fiber ribbon is inserted into the sleeve, and then the sleeve is inserted into the accommodating cavity of the third connection portion 401c. As can be seen from the figure, the inner diameters of the first connecting portion 401a, the second connecting portion 401b and the third connecting portion 401c are all different in size, and there is a transition connecting portion at the interface between the first connecting portion 401a and the second connecting portion 401b, There is also a filter connection part at the interface between the second connection part 401b and the third connection part 401c. The shape of the optical fiber socket 401 is consistent with the structure of the optical fiber. The layer is placed at the first connection part 401a, and the protective layer of the optical fiber is placed at the second connection part 401b, and the number of fibers is large and the fibers are relatively soft, so a third connection part 401c is required for gathering and fixing the fibers.

In the embodiment of the present disclosure, the optical fiber socket 401 and the first lens assembly 400 are integrally formed, so that the relative position of the external optical fiber and the first lens assembly 400 can be fixed, and there will be no positional deviation between the external optical fiber and the first lens assembly 400. This helps to improve the coupling precision of the signal light to the optical fiber after the bundle is combined, so that the coupling efficiency of the signal light from the first lens assembly 400 to the external optical fiber is increased. Finally, signal lights of different wavelengths can share a single fiber to transmit out of the optical module, so as to realize simultaneous transmission of signal lights of multiple wavelengths in a single fiber.

As shown in FIG. 9 , the optical multiplexing component 460 includes light entrance ports for incident light beams of different wavelengths into the optical multiplexing component 460 , but only has one light exit port for exiting the combined light beam. It is assumed that there are 4 signal lights with wavelengths λ1, λ2, λ3 and λ4 that need to be combined into one signal light, and the four optical signals that need to be combined are incident on the optical multiplexing component 460 through different light entrances of the optical multiplexing component 460, The λ1 signal light passes through the optical multiplexing component 206 and the first reflecting surface 410 for six different reflections to reach the light exit port, and the λ2 signal light passes through the optical multiplexing component 206 and the first reflecting surface 410 for four different reflections to reach the light exit port, The λ3 signal light passes through the optical multiplexing component 206 and the first reflective surface 410 for two different reflections to reach the light outlet, and the λ4 signal light enters the optical multiplexing component 206 and then directly transmits to the light outlet, and then the signal light of different wavelengths passes through different wavelengths. The optical input port of the optical fiber enters the optical multiplexing component 460, and is output from the optical multiplexing component 460 through the same optical exit port. In this way, 4 beams of signal light with different wavelengths are combined into one beam at the optical outlet, and then the combined signal beam is transmitted to the optical fiber through the optical outlet. Signal light of multiple wavelengths is transmitted simultaneously.

In the second implementation, the present disclosure also provides another structure of the optical module and its corresponding first lens assembly and other structures. 11 is a schematic diagram of the exploded structure of the second optical module provided in the embodiment of the present disclosure; FIG. 12 is a schematic structural diagram of the second optical module provided by the embodiment of the present disclosure after removing the upper casing, the lower casing and the unlocking part; 13 is a perspective view of a second type of first lens assembly provided by an embodiment of the present disclosure; FIG. 14 is a second schematic cross-sectional structure diagram of a second type of first lens assembly provided by an embodiment of the present disclosure; FIG. 15 is provided by an embodiment of the present disclosure A schematic diagram of the exploded structure of the second first lens assembly; in an embodiment of the present application, as shown in FIG. 10 , the structure of the first lens assembly 400 in this embodiment is the same as that of the first lens assembly in the first embodiment. 12 clearly shows the structure of the first lens assembly 400 in this embodiment. The difference between the structure of the first lens assembly 400 in this embodiment and the previous embodiments is that the first lens assembly 400 in this embodiment Both ends of a lens assembly 400 have two inward bearing surfaces, which are defined as a first bearing surface 470a and a second bearing surface 470b for the convenience of description. The lens array and the lens assembly are fixed; Fig. 16 clearly shows that the collimating lens array 450 is a flat structure, on which a plurality of collimating lenses are arranged to collimate the signal light emitted by the light emitting chip. One end of the collimating lens array 450 is placed on the first bearing surface 470a, and the other end is placed on the second bearing surface 470b. The collimating lens array 450 of this structure is preferably connected to the first lens assembly 400 during packaging, and then cooperates with the cover to set. At the upper end of the light emitting chip array 440, in this embodiment, the collimating lens array 450, the first bearing surface 470a and the second bearing surface 470b cooperate with each other to ensure that the relative positions of the collimating lens array 450 and the first lens assembly 400 are fixed. The signal light emitted by the light emitting chips in the light emitting chip array 440 is fixed to the emission direction of the collimating lens array 450, thereby ensuring the collimation of the signal light emitted by the light emitting chips in the light emitting chip array 440 by the collimating lens array 450 Effect. In the embodiment of the present disclosure, the flat-plate structure of the collimating lens array 450 can be set as a horizontal I-shape, the two ends are horizontally placed on the corresponding bearing surfaces, and the surface of the main body plate in the middle of the I-shape flat plate is provided with a plurality of collimators. Lenses, a plurality of collimating lenses are arranged on the surface of the main body plate in the form of an array.

It should be noted that other devices in the second embodiment and the first embodiment, such as the first reflecting surface 410, the second reflecting surface 420, the first receiving cavity 430, the light emitting chip array 440, the light multiplexing component 460 and the optical fiber The structure and function of the socket 401 are the same as those in the first embodiment, and are not repeated here.

In order to facilitate assembly, the total length of the collimating lens array 450 needs to be smaller than the length of the inner diameter of the first bearing surface 470a to the second bearing surface 470b, that is, the inner wall of the collimating lens array 450 to the first bearing surface 470a has a certain surplus length, The inner wall of the collimating lens array 450 to the second bearing surface 470b has a certain surplus length.

In the third embodiment, this embodiment provides an optical module of another structure and each optical device thereof. 16 is a schematic diagram of an exploded structure of a third optical module provided in an embodiment of the present disclosure; FIG. 17 is a schematic diagram of a cross-sectional structure of a third type of first lens assembly provided in an embodiment of the present disclosure; A perspective view of a third first lens assembly; FIG. 19 is an exploded view 1 of a third first lens assembly according to an embodiment of the present disclosure; FIG. 20 is an exploded view of a third first lens assembly according to an embodiment of the present disclosure 2. In the first embodiment and the second embodiment, the optical fiber socket and the first lens assembly are integrated to realize the transmission of the synthesized signal light to the external optical fiber. Of course, other methods can also be used to realize the synthesized signal light. The signal light is transmitted to the external optical fiber. In this embodiment, the synthesized signal light is transmitted to the external optical fiber by arranging the optical fiber support. The specific implementation is as follows:

As shown in FIG. 16 , in this embodiment, the optical module includes a first lens assembly 400 , an optical fiber array 900 , an optical fiber adapter 600 , and an optical fiber support 800 . As shown in FIG. 18 , it also includes a converging lens array 700 , wherein the first lens The component includes a first reflecting surface 410, a second reflecting surface 420, a light emitting chip array 440, a collimating lens array 450, and an optical multiplexing component 460, wherein the surfaces of the first reflecting surface 410 and the second reflecting surface 420 are straight surfaces, and The functions of each device are the same as those in the foregoing embodiments, and are not repeated here.

The upper surface of the lens assembly includes an inclined second reflective surface, which can collect and reflect the light from the optical multiplexing component to the optical fiber array; a converging lens array is arranged between the second reflective surface and the optical fiber array, and the lens array will The light from the second reflecting surface is collected and directed towards the fiber array. The optical fiber array includes an optical fiber bracket, the end of the optical fiber bracket is provided with a through hole, and the optical fiber is arranged in the through hole;

Wherein, the converging lens array 700 is arranged at one end of the second reflecting surface 420 close to the light outlet, and the signal light synthesized by the optical multiplexing component 460 is transmitted to the second reflecting surface 420, and then is reflected by the second reflecting surface 420 and then coupled to the converging lens array 700, The optical fiber support 800 is converged by the converging lens array 700, wherein the fiber support 800 is provided with a plurality of optical fiber ribbons, and the optical fiber ribbons are connected with the optical fiber adapter 600, thereby realizing the transmission of optical signals.

It should be noted that the converging lens array 700 in the embodiment of the present disclosure can also be arranged at the front end of the optical fiber support 800 , and the converging lens array 700 and the optical fiber support 800 can be set as an integrated structure, and the converging lens array 700 can be converged after the converging lens array 700 is converged. The light spot is then coupled into the fiber support 800, the fiber array includes a fiber support, the fiber is arranged in the fiber support, and the end surface of the fiber support is provided with a converging lens array; the converging lens array converges the light from the lens assembly into the fiber.

At this time, the structure of the optical fiber holder 800 includes the converging lens array 700, and the converging lens array 700 in the foregoing embodiment is disposed between the second reflecting surface 420 and the optical fiber holder 800, and the first lens assembly 400 includes the converging lens array at this time. 700.

As shown in FIGS. 18-20 , one end of the first lens assembly 400 has a bearing table, and the optical fiber holder 800 is placed on the surface of the bearing table. The front end of the first lens assembly 400 is provided with two limiting parts 900a. Two docking parts 900b are provided, and the docking parts 900b are inserted into the corresponding limiting parts 900a, so as to realize the connection between the first lens assembly 400 and the optical fiber support 800; In the form of a limiting column, the docking part 900b is formed as a limiting hole, and the limiting column is inserted into the corresponding limiting hole to realize the docking of the first lens assembly 400 and the optical fiber holder 800. As shown in FIG. 20, the first lens assembly One end of 400 near the limiting member 900a is provided with a boss, the bottom end of the optical fiber support 800 is recessed inward to form a concave platform, the lower surface of the concave platform is seated on the boss, and both ends of the optical fiber support 800 are set on two sides of the boss. On the side surface, the upper surface of the concave platform is provided with an installation groove for installing the optical fiber ribbon. The installation groove can fix and limit the optical fiber ribbon. The converging lens array 700 is provided with a first light-passing port, and the optical fiber support 800 is provided with a second light-passing port. The optical fiber ribbon passes through the optical fiber support along the first optical port and the second optical port and is placed in the installation groove.

FIG. 9 is a use state diagram of a first lens assembly provided by an embodiment of the present disclosure; FIG. 10 is a working principle diagram of an optical multiplexing assembly provided by an embodiment of the present disclosure; the light-emitting chips in the light-emitting chip array 440 are located along the circuit board 300 in the width direction (the width direction of the first lens assembly 400 ) is arranged in rows. As shown in FIG. 10 , the collimating lens array 450 provided in the first accommodating cavity 430 of the first lens assembly 400 includes four lenses, and the four lenses are arranged in a row along the width direction of the first lens assembly 400 . The collimating lens array The lens in 450 can be used for the collimation of four beams of signal light, and the four beams of signal light collimated by the lens in the collimating lens array 450 are folded back between the optical multiplexing component 460 and the first reflecting surface 410, and finally one beam is output. Signal light, the beam of signal light includes signal light of different wavelengths.

In the embodiment of the present disclosure, the optical multiplexing component 460 utilizes different film layers arranged on both sides and different positions to transmit and reflect the signal light of different wavelengths, and combine multiple beams of signal light of different wavelengths into one beam of light. The optical multiplexing component 206 coordinately selects the number of reflections of each beam according to the number of beams to be combined.

In an embodiment of the present application, the signal light emitted by the light emitting chip in the light emitting chip array 440 is transmitted upward and transmitted to the lens in the collimating lens array 450, and the signal light emitted by the light emitting chip is divergent light passing through the lens Collimation is parallel light; the signal light collimated by the collimating lens array 450 is transmitted to the optical multiplexing component 460, and the light beam of one wavelength is transmitted to the first reflecting surface 410 through the optical multiplexing component 460, and is transmitted through the first reflecting surface 410. Totally reflected to the optical multiplexing component 460, at this time, the light beam with another wavelength is transmitted to the first reflecting surface 410 after being combined by the optical multiplexing component 460, and is totally reflected to the optical multiplexing component 460 by the first reflecting surface 410. At this time and another wavelength of light beams are combined by the optical multiplexing component 460 and then transmitted to the first reflection surface 410, thus completing the multiplexing of multiple beams of signal light with different wavelengths, and finally generating a beam of signal light, which passes through the second beam. The reflection surface 420 is reflected into the optical fiber ribbon to realize simultaneous transmission of signal light of multiple wavelengths in a single optical fiber. In the optical module provided by the present disclosure, only through the first lens component and the optical multiplexing component disposed in the first accommodating cavity, the beam combining of multiple signal lights with different wavelengths is completed, which improves the coupling when coupling multiple channels in the optical module. precision.

The light receiving structure will be described below.

In the embodiment of the present disclosure, the structure of the second lens assembly 500 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. FIG. 21 is an exploded structure of a second lens assembly provided by an embodiment of the present disclosure. Fig. 22 is an exploded structural view of still another second lens assembly provided by an embodiment of the present disclosure. As shown in FIG. 22 or 23, the second lens assembly 500 and the circuit board 300 form a second accommodating cavity 530, and the second accommodating cavity 530 is used for arranging optical devices. In an embodiment of the present application, from the circuit board 300 to the top The light receiving chip array 540 , the second collimating lens array 550 and the light demultiplexing component 560 are arranged in the second accommodating cavity 530 in sequence. And, the top surface of the second lens assembly 500 is provided with a third reflection surface 520 and a fourth reflection surface 510 . The light-receiving chip array 540 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 the form of an array, and the light-receiving chips are arranged in the length direction and the width direction of the circuit board. , in which a row of light-receiving chips in the length direction is set to one group, so that multiple groups of light-receiving chips can be set. Refer to Figure 4 for the definition of the length direction and width direction of the circuit board. The direction in Figure 4 is defined as the circuit board from left to right. The length direction, from top to bottom, is defined as the width direction of the circuit board. The second collimating lens array 550 includes several collimating lenses for collimating the signal light output by the light demultiplexing component 560 . The second collimating lens array 550 is covered above the light-receiving chip array 540. The number of lenses in the second collimating lens array 550 depends on the number of light-receiving chips in the light-receiving chip array 540. Usually, the second collimating lens array The number of lenses of 550 is equal to the number of light-receiving chips in the light-receiving chip array 540 . The optical demultiplexing component 560 is disposed on the inner wall of the second accommodating cavity 530, and is used for decomposing a signal light into multiple signal lights with different wavelengths. The optical demultiplexing component 560 includes a plurality of filters. In the embodiment of the present disclosure, the optical demultiplexing component 560 uses different film layers arranged on both sides and different positions to transmit and reflect the signal light of different wavelengths, and split a signal light including different wavelengths into multiple beams of light . The optical demultiplexing component 560 coordinately selects the number of reflections of the signal light of each wavelength according to the wavelength type of the split light and the number of split 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 500 , and the beam of signal light is reflected by the third reflecting surface 520 to the light demultiplexing assembly 560 , wherein The light beam of one wavelength passes through the optical demultiplexing component 560, the light beam of the remaining wavelength is reflected to the fourth reflecting surface 510, and is reflected to the optical demultiplexing component 560 through the fourth reflecting surface 510, and the light beam of another wavelength transmits the optical demultiplexing component 560. Using the component 560, the light beams with the remaining wavelengths are reflected to the fourth reflecting surface 510, so that a beam of signal light with different wavelengths is demultiplexed into multiple signal lights with different wavelengths, which are collimated by the second collimating lens array 550 in sequence. It is transmitted to the light receiving chips in the light receiving chip array to realize the function of the optical module receiving signal light of multiple wavelengths in a single fiber. In the optical module provided by the present disclosure, only through the second lens component and the optical demultiplexing component disposed in the second accommodating cavity, a beam of signal light with different wavelengths is completed, which improves the coupling of multi-channels in the optical module. coupling accuracy at time.

FIG. 23 is a schematic diagram of an exploded structure of a second lens assembly according to an embodiment of the present disclosure; and FIG. 24 is a schematic diagram of a working principle of an optical demultiplexing assembly according to an embodiment of the present disclosure. As shown in FIGS. 23-24 , the optical demultiplexing component 560 includes a light input port for incident signal light of multiple wavelengths, and includes a plurality of light output ports for output light, and each light output port is used for outputting one wavelength. signal light. Assuming that the second lens assembly 500 enters a beam of signal light with four wavelengths of λ1, λ2, λ3 and λ4, the signal light enters the optical demultiplexing assembly 560 through the incident light port of the optical demultiplexing assembly 560, wherein the λ1 signal light After passing through the optical demultiplexing component 560 and the fourth reflecting surface 510, it undergoes six different reflections to reach the light outlet, and the λ2 signal light passes through the optical demultiplexing component 560 and the fourth reflecting surface 510 and undergoes four different reflections to reach its light outlet. At the light outlet, the λ3 signal light passes through the optical demultiplexing component 560 and the fourth reflection surface 510 for two different reflections to reach the light outlet, and the λ4 signal light enters the optical demultiplexing component 560 and is directly transmitted to its light outlet. , so that signal lights of different wavelengths enter the optical demultiplexing component 560 through the same light entrance port, and are outputted through different light exit ports.

For the details of the second lens assembly 500 in the embodiments of the present disclosure, reference may be made to the first lens assembly 400 .

It should be noted that the present disclosure provides two structures of lens assemblies, two structures of collimating lens arrays, optical fiber sockets and optical fiber supports, which can be combined arbitrarily between the two ways of connecting optical signals and external optical fibers, and It is not limited to the three embodiments provided in the present disclosure, and other combined structures are all within the protection scope of the present disclosure.

In the optical module provided by the present disclosure, the first lens assembly and the circuit board form a accommodating cavity, and the accommodating cavity is sequentially provided with a light emitting chip array, a collimating lens array and an optical multiplexing assembly from bottom to top, and the surface of the first lens assembly has The first reflective surface and the second reflective surface, the first reflective surface and the second reflective surface can be connected to each other, wherein 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. After being collimated and focused by the collimating lens array, parallel light is formed. Multiple parallel lights with different wavelengths are transmitted to the optical multiplexing component, and the light beam of one wavelength is transmitted through the optical multiplexing component to the first The reflective surface is totally reflected by the first reflective surface to the optical multiplexing component. At this time, the light beam with another wavelength is transmitted to the first reflective surface after being combined by the optical multiplexing component, and then completely reflected by the first reflective surface to the optical multiplexing component. At this time, the light beam with another wavelength is transmitted to the first reflecting surface after being combined by the optical multiplexing component, thus completing the combining of multiple signal lights with different wavelengths, and finally generating a beam of signal light, which passes through After being reflected by the second reflective surface, it is sent to the optical fiber ribbon to realize simultaneous transmission of signal light of multiple wavelengths in a single optical fiber. In the optical module provided by the present disclosure, only through the first lens component and the optical multiplexing component disposed in the first accommodating cavity, the beam combining of multiple signal lights with different wavelengths is completed, which improves the coupling when coupling multiple channels in the optical module. precision.

In the optical module provided by the present disclosure, the second lens assembly and the circuit board form a second accommodating cavity, and the light receiving chip array, the collimating lens array and the light demultiplexing assembly are sequentially arranged in the cavity from bottom to top, and the second lens assembly The top surface of the optical module has a third reflection surface and a fourth reflection surface, and the third reflection surface and the fourth reflection surface can be connected to each other; a beam of signal light with different wavelengths outside the optical module is transmitted to the second lens assembly, the beam The signal light is reflected by the third reflective surface and then sent to the optical demultiplexing component. The light beam of one wavelength passes through the optical demultiplexing component, and the light beam of the remaining wavelength is reflected to the fourth reflective surface, and then reflected to the optical demultiplexing component through the fourth reflective surface. Using the component, the light beam of another wavelength passes through the optical demultiplexing component, and the light beam of the remaining wavelength is reflected to the fourth reflection surface, so that a beam of signal light with different wavelengths is divided into multiple beams of signal light with different wavelengths. After the collimating lens array is transmitted to the light receiving chips in the light receiving chip array in turn, the function of the optical module receiving signal light of multiple wavelengths in a single optical fiber is realized. In the optical module provided by the present disclosure, only through the second lens component and the optical demultiplexing component disposed in the second accommodating cavity, a beam of signal light with different wavelengths is completed, which improves the coupling of multi-channels in the optical module. coupling accuracy at time.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims (40)

1. An optical module, characterized in that it includes:

   circuit board;

   The first lens assembly is covered on the light emitting chip array, and the surface has a first reflection surface and a second reflection surface;

   The light emitting chip array is disposed on the surface of the circuit board, and includes a plurality of light emitting chips for emitting multiple beams of signal light with different wavelengths;

   The first collimating lens array is arranged between the light emitting chip array and the light multiplexing component, and includes a plurality of collimating lenses for receiving the signal light from the light emitting chip and condensing it into parallel light;

   an optical multiplexing component, disposed on the inner wall of the first lens component, for receiving the signal light from the first collimating lens array, and the signal light from each collimating lens is incident on different positions of the optical multiplexing component , and together with the first reflective surface, multiple beams of signal light with different wavelengths are combined into one signal light, and the combined signal light is transmitted to the second reflective surface, and then emitted after being reflected by the second reflective surface. to the external fiber.
2. The optical module according to claim 1, wherein the first collimating lens array comprises a flat plate and side plates disposed at both ends of the flat plate, and the flat plate and the two side plates are integrally formed.
3. The optical module according to claim 1, wherein a convex structure is provided on the surface of the second reflecting surface.
4. The optical module according to claim 1, wherein the surface of the first reflection surface is an inclined surface, and the surface of the second reflection surface is an inclined surface.
5. The optical module according to claim 1, wherein the end of the first lens assembly close to the light outlet is provided with a first optical fiber socket, and the first optical fiber socket comprises:

   a first connection part, used for plugging with the optical fiber cladding;

   The second connecting part is used for plugging with the optical fiber protective layer;

   The third connecting part is used for accommodating the hub part wrapping the optical fiber ribbon.
6. An optical module, characterized in that it includes:

   circuit board;

   The second lens assembly is covered on the light emitting chip array, and has a third reflection surface and a fourth reflection surface on the surface, wherein the third reflection surface is used to receive signal light from an external optical fiber;

   an optical demultiplexing component, arranged on the inner wall of the second lens component, for receiving the signal light from the third reflecting surface, and dividing a signal light into multiple beams together with the fourth reflecting surface Signal light of different wavelengths;

   The second collimating lens array is arranged between the light-receiving chip array and the optical demultiplexing component, and includes a plurality of collimating lenses for receiving the signal light emitted from different positions of the optical demultiplexing component and condensing them into parallel light ;

   The light-receiving chip array is disposed on the surface of the circuit board, and includes a plurality of light-receiving chips for receiving the signal light from the second collimating lens array.
7. The optical module according to claim 6, wherein the second collimating lens array comprises a flat plate and side plates disposed at both ends of the flat plate, and the flat plate and the two side plates are integrally formed.
8. The optical module according to claim 6, wherein the surface of the third reflection surface is provided with a convex structure.
9. The optical module according to claim 6, wherein the surface of the third reflection surface is an inclined surface, and the surface of the fourth reflection surface is an inclined surface.
10. The optical module according to claim 6, wherein the end of the second lens assembly close to the light outlet is provided with a second optical fiber socket, and the second optical fiber socket comprises:

    the fourth connection part is used for plugging with the fiber cladding;

    The fifth connecting part is used for plugging with the optical fiber protective layer;

    The sixth connecting part is used for accommodating the hub part wrapping the optical fiber ribbon.
11. An optical module, characterized in that it includes:

    circuit board;

    The first lens assembly is covered on the light emitting chip array, the surface has a first reflection surface and a second reflection surface, and the bottom end is respectively provided with an inward first bearing surface and a second bearing surface;

    The light emitting chip array is disposed on the surface of the circuit board, and includes a plurality of light emitting chips for emitting multiple beams of signal light with different wavelengths;

    The first collimating lens array is set as a flat plate structure, one end is placed on the first bearing surface, the other end is placed on the second bearing surface, and is arranged between the light emitting chip array and the light multiplexing component, Including a plurality of collimating lenses for receiving the signal light from the light emitting chip and condensing it into parallel light;

    an optical multiplexing component, disposed on the inner wall of the first lens component, for receiving the signal light from the first collimating lens array, and the signal light from each collimating lens is incident on different positions of the optical multiplexing component , and together with the first reflective surface, multiple beams of signal light with different wavelengths are combined into one signal light, and the combined signal light is transmitted to the second reflective surface, and then emitted after being reflected by the second reflective surface. to the external fiber.
12. The optical module according to claim 11, wherein the length of the first collimating lens array is smaller than the inner length between the first bearing surface and the second bearing surface.
13. The optical module according to claim 11, wherein the surface of the second reflection surface is provided with a convex structure.
14. The optical module according to claim 11, wherein the first reflection surface is an inclined surface, and the second reflection surface is an inclined surface.
15. The optical module according to claim 11, wherein the end of the first lens assembly close to the light outlet is provided with a first optical fiber socket, and the first optical fiber socket comprises:

    a first connection part, used for plugging with the optical fiber cladding;

    The second connecting part is used for plugging with the optical fiber protective layer;

    The third connecting part is used for accommodating the hub part wrapping the optical fiber ribbon.
16. An optical module, characterized in that it includes:

    circuit board;

    The second lens assembly is covered on the light emitting chip array, the surface has a third reflection surface and a fourth reflection surface, and the bottom end is respectively provided with an inward third bearing surface and a fourth bearing surface, wherein the third reflection surface Used to receive signal light from external optical fibers;

    an optical demultiplexing component, arranged on the inner wall of the second lens component, for receiving the signal light from the third reflecting surface, and dividing a signal light into multiple beams together with the fourth reflecting surface Signal light of different wavelengths;

    The second collimating lens array is set as a flat plate structure, one end is placed on the third bearing surface, the other end is placed on the fourth bearing surface, and is arranged between the light receiving chip array and the light demultiplexing component, including a plurality of collimating lenses for receiving the signal light emitted from different positions of the optical demultiplexing component and condensing them into parallel light;

    The light-receiving chip array is disposed on the surface of the circuit board, and includes a plurality of light-receiving chips for receiving the signal light from the second collimating lens array.
17. The optical module according to claim 16, wherein the length of the second collimating lens array is smaller than the inner length between the third bearing surface and the fourth bearing surface.
18. The optical module according to claim 16, wherein the surface of the third reflection surface is provided with a convex structure.
19. The optical module according to claim 16, wherein the surface of the third reflection surface is an inclined surface, and the surface of the fourth reflection surface is an inclined surface.
20. The optical module according to claim 16, wherein the end of the second lens assembly close to the light outlet is provided with a second optical fiber socket, and the second optical fiber socket comprises:

    the fourth connection part is used for plugging with the fiber cladding;

    The fifth connecting part is used for plugging with the optical fiber protective layer;

    The sixth connecting part is used for accommodating the hub part wrapping the optical fiber ribbon.
21. An optical module, characterized in that it includes:

    circuit board;

    The first lens assembly is covered on the light emitting chip array, the surface has a first reflection surface and a second reflection surface, and one end side is provided with a limiting component;

    a first optical fiber support, one end side is provided with a butt part, and the butt part is inserted into the limit part;

    The light emitting chip array is disposed on the surface of the circuit board, and includes a plurality of light emitting chips for emitting multiple beams of signal light with different wavelengths;

    The first collimating lens array is arranged between the light emitting chip array and the light multiplexing component, and includes a plurality of collimating lenses for receiving the signal light from the light emitting chip and condensing it into parallel light;

    an optical multiplexing component, disposed on the inner wall of the first lens component, for receiving the signal light from the first collimating lens array, and the signal light from each collimating lens is incident on different positions of the optical multiplexing component , and combine multiple beams of signal light with different wavelengths into one signal light together with the first reflecting surface;

    The first converging lens array includes a plurality of converging lenses, which are used for receiving the combined signal light of the optical multiplexing component, condensing it into a converging light spot, and being coupled into the first optical fiber support.
22. The optical module according to claim 21, wherein the first converging lens array is disposed between the second reflecting surface and the optical fiber support.
23. The optical module according to claim 21, wherein the first optical fiber holder has the first converging lens array.
24. The optical module according to claim 21, wherein one end of the first lens assembly close to the light outlet is provided with a first optical fiber socket, and the first optical fiber socket comprises:

    a first connection part, used for plugging with the optical fiber cladding;

    The second connecting part is used for plugging with the optical fiber protective layer;

    The third connecting part is used for accommodating the hub part wrapping the optical fiber ribbon.
25. The optical module according to claim 21, wherein the first reflection surface is an inclined surface, and the second reflection surface is an inclined surface.
26. An optical module, characterized in that it includes:

    circuit board;

    The second lens assembly is covered on the light emitting chip array, the surface has a third reflection surface and a fourth reflection surface, and one end side is provided with a limiting component;

    a second optical fiber support, one end side is provided with a butt part, and the butt part is inserted into the limit part;

    a second converging lens array, comprising a plurality of converging lenses for receiving the signal light from the second optical fiber support and converging the signal light to the third reflecting surface;

    an optical demultiplexing component, arranged on the inner wall of the second lens component, for receiving the signal light from the third reflecting surface, and dividing a signal light into multiple beams together with the fourth reflecting surface Signal light of different wavelengths;

    The second collimating lens array is arranged between the light-receiving chip array and the optical demultiplexing component, and includes a plurality of collimating lenses for receiving the signal light emitted from different positions of the optical demultiplexing component and condensing them into parallel light ;

    The light-receiving chip array is disposed on the surface of the circuit board, and includes a plurality of light-receiving chips for receiving the signal light from the second collimating lens array.
27. The optical module according to claim 26, wherein the second converging lens array is arranged between the third reflecting surface and the optical fiber support.
28. The optical module according to claim 26, wherein the second optical fiber holder has the second converging lens array.
29. The optical module according to claim 26, wherein the end of the second lens assembly close to the light outlet is provided with a second optical fiber socket, and the second optical fiber socket comprises:

    the fourth connection part is used for plugging with the fiber cladding;

    The fifth connecting part is used for plugging with the optical fiber protective layer;

    The sixth connecting part is used for accommodating the hub part wrapping the optical fiber ribbon.
30. The optical module according to claim 26, wherein the surface of the third reflection surface is an inclined surface, and the surface of the fourth reflection surface is an inclined surface.
31. An optical module, characterized in that it includes

    circuit board;

    an array of light emitting chips, arranged on the surface of the circuit board, divided into groups by rows or columns, and a plurality of light emitting chips in a group can emit multiple beams of light signals of different wavelengths;

    a collimating lens array, arranged in the light-emitting direction of the light-emitting chip array, and a single lens converges a single beam of light;

    a lens assembly, arranged on the circuit board, and covered on the light emitting chip array and the collimating lens array;

    an optical multiplexing component, which is arranged in the light-emitting direction of the collimating lens array and is fixedly connected to the inner wall of the lens component, and is used for combining the multiple beams of light into one beam of light;

    An optical fiber array, connected to the lens assembly, is capable of receiving the beam of light.
32. The optical module according to claim 31, wherein,

    The surface of the optical multiplexing component facing the collimating lens array is a filter surface, and the surface facing the lens component includes a main body reflective surface and a light-transmitting surface;

    A plurality of different positions of the filtering surface respectively transmit a plurality of single beams of light from the collimating lens array;

    The main body reflecting surface is capable of reflecting light from the filter surface toward the filter surface;

    the filter surface is capable of reflecting light from the main body reflection surface;

    the light-transmitting surface is capable of transmitting light from the filtering surface;

    The combination of the filter surface and the main body reflection surface realizes that multiple beams of light are combined into one beam of light.
33. The optical module according to claim 31, wherein,

    The surface of the optical multiplexing component facing the collimating lens array is a filter surface, and the surface facing the lens component is a light-transmitting surface;

    The upper surface of the lens assembly includes a first reflective surface;

    A plurality of different positions of the filtering surface respectively transmit a plurality of single beams of light from the collimating lens array;

    the light-transmitting surface can transmit light from the filtering surface and the first reflecting surface;

    the first reflecting surface is capable of reflecting light from the filtering surface toward the filtering surface;

    the filter surface is capable of reflecting light from the first reflecting surface;

    The filtering surface and the first reflecting surface cooperate to realize that multiple beams of light are combined into one beam of light.
34. The optical module according to any one of claims 32 or 33, wherein,

    The upper surface of the lens assembly includes an inclined second reflecting surface, and the second reflecting surface is provided with a converging lens array capable of condensing and reflecting the light from the optical multiplexing assembly toward the optical fiber array .
35. The optical module according to any one of claims 32 or 33, wherein,

    The upper surface of the lens assembly includes an inclined second reflective surface, the second reflective surface can collect and reflect the light from the optical multiplexing assembly toward the optical fiber array;

    A converging lens array is disposed between the second reflecting surface and the optical fiber array, and the lens array condenses the light from the second reflecting surface and emits the light toward the optical fiber array.
36. The optical module according to claim 32 or 33, wherein,

    The collimating lens array includes a main board and a side board supporting the body, the side board is arranged on the circuit board, and the main board is provided with a convex array capable of condensing light.
37. The optical module according to any one of claims 32 or 33, wherein,

    The collimating lens array is fixed with the lens assembly.
38. The optical module according to any one of claims 32 or 33, wherein,

    The lens assembly further includes a fiber optic socket, and the fiber optic array includes a fiber optic hub that is inserted into the fiber array socket.
39. The optical module according to claim 35, wherein,

    The optical fiber array includes an optical fiber support, the end of the optical fiber support is provided with a through hole, and the optical fiber is arranged in the through hole;

    The converging lens array is arranged on the lens assembly, and the light condensed by the converging lens enters the optical fiber through the through hole.
40. The optical module according to claim 35, wherein,

    The optical fiber array includes an optical fiber support, the optical fiber is arranged in the optical fiber support, and the converging lens array is arranged on the end surface of the optical fiber support;

    The converging lens array concentrates light from the lens assembly into the optical fiber.

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