CN114384643B - Optical module - Google Patents

Abstract

The application provides an optical module, wherein a first lens component and a circuit board form a packaging cavity, a light emitting chip component, a first collimating lens component, a light multiplexing component and a first reflecting surface are sequentially arranged in the packaging cavity from the direction of the circuit board to the top, the top surface of the first lens component is provided with the first reflecting surface and the second reflecting surface, a plurality of light emitting chips in the light emitting chip component emit a plurality of beams of light with different wavelengths, the propagation direction of the light emitting chips is changed through the first reflecting surface, a beam of light is obtained after the light multiplexing component is combined, and the beam of light is converged into an optical fiber after being reflected by the second reflecting surface, so that signal light with a plurality of wavelengths in a single optical fiber can be transmitted simultaneously. In the optical module provided by the application, the combination of a plurality of signal lights with different wavelengths is finished only through the first lens component and the optical multiplexing component arranged in the first accommodating cavity, so that the coupling precision of the optical module when multiple channels are coupled is improved.

Description

Optical module

Technical Field

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

Background

With the development of new business and application modes such as cloud computing, mobile internet, video and the like, the development and progress of optical communication technology become more and more important. In the optical communication technology, the optical module is a tool for realizing the mutual conversion of optical signals, is one of key devices in the optical communication equipment, and along with the continuous improvement of the transmission rate of the optical module according to the development of the optical communication technology, the transmission rate can be improved by simultaneously transmitting optical signals with multiple wavelengths in a single-mode optical fiber, so that an optical module is required to realize the simultaneous transmission of signal lights with multiple wavelengths in a single optical fiber, and further improve the transmission rate.

Disclosure of Invention

The application provides an optical module which is convenient for realizing the simultaneous transmission of signal lights with multiple wavelengths in a single optical fiber.

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

a circuit board;

the first lens component is covered on the light emitting chip array, and the surface of the first lens component is provided with a first reflecting surface and a second reflecting surface;

the light emitting chip array is arranged on the surface of the circuit board and comprises a plurality of light emitting chips for emitting a plurality of signal lights with different wavelengths;

the first collimating lens array is arranged between the light emitting chip array and the light multiplexing component and comprises a plurality of collimating lenses, wherein the collimating lenses are used for receiving signal light from the light emitting chip and converging the signal light into parallel light;

the optical multiplexing assembly is arranged on the inner wall of the first lens assembly and is used for receiving the signal light from the first collimating lens array, the signal light from each collimating lens is incident to different positions of the optical multiplexing assembly, and multiple signal light beams with different wavelengths are combined into one beam of signal light together with the first reflecting surface, the combined signal light is transmitted to the second reflecting surface, and the combined signal light is reflected by the second reflecting surface and then is emitted to an external optical fiber.

In the optical module provided by the application, the first lens component and the circuit board form the accommodating cavity, the accommodating cavity is sequentially provided with the light emitting chip component, the first collimating lens component and the light multiplexing component from bottom to top, the surface of the first lens component is provided with the first reflecting surface and the second reflecting surface, the light emitting chip component comprises a plurality of light emitting chips, the light emitting chip component can emit a plurality of signal lights with different wavelengths, at the moment, the signal lights are in a scattering state, parallel lights are formed after being collimated and focused by the first collimating lens component, the plurality of parallel lights with different wavelengths are transmitted to the light multiplexing component, the light beam with one wavelength is transmitted to the first reflecting surface through the light multiplexing component, the light beam with the other wavelength is transmitted to the first reflecting surface through the total reflection of the first reflecting surface through the combination of the light multiplexing component, at the moment, the light beam with the other wavelength is transmitted to the first reflecting surface through the combination of the light multiplexing component, the signal lights with different wavelengths are finally generated, and the signal lights with the different wavelengths are transmitted to the plurality of optical fibers after being converged by the second reflecting surface, and the signal lights with the single wavelength are simultaneously converged. In the optical module provided by the application, the combination of a plurality of signal lights with different wavelengths is finished only through the first lens component and the optical multiplexing component arranged in the first accommodating cavity, so that the coupling precision of the optical module when multiple channels are coupled is improved.

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

a circuit board;

the second lens component is covered on the light emitting chip array, and the surface of the second lens component is provided with a third reflecting surface and a fourth reflecting surface, wherein the third reflecting surface is used for receiving signal light from an external optical fiber;

the optical demultiplexing component is arranged on the inner wall of the second lens component and is used for receiving the signal light from the third reflecting surface and dividing one beam of signal light into a plurality of signal lights with different wavelengths together with the fourth reflecting surface;

the second collimating lens array is arranged between the light receiving chip array and the light demultiplexing component and comprises a plurality of collimating lenses, and the collimating lenses are used for receiving signal lights sent out from different positions of the light demultiplexing component and converging the signal lights into parallel lights;

the light receiving chip array is arranged on the surface of the circuit board and comprises a plurality of light receiving chips for receiving the signal light from the second collimating lens array.

In the optical module provided by the application, a second accommodating cavity is formed by the second lens component and the circuit board, a light receiving chip array, a second collimating lens component and a light demultiplexing component are sequentially arranged in the cavity from bottom to top, and the top surface of the second lens component is provided with a third reflecting surface and a fourth reflecting surface; and one beam of signal light with different wavelengths outside the optical module is transmitted to the second lens assembly, the beam of signal light is reflected by the third reflecting surface and then is converged to the optical demultiplexing assembly, the light beam with one wavelength is transmitted through the optical demultiplexing assembly, the light beam with the remaining wavelength is reflected to the fourth reflecting surface and is reflected to the optical demultiplexing assembly through the fourth reflecting surface, the light beam with the other wavelength is transmitted through the optical demultiplexing assembly, and the light beam with the remaining wavelength is reflected to the fourth reflecting surface, so that the beam of signal light with different wavelengths is split into a plurality of signal lights with different wavelengths, and the signal lights with different wavelengths are sequentially transmitted to the optical receiving chips in the optical receiving chip array after passing through the second collimating lens assembly, and the function of the optical module for receiving the signal lights with a plurality of wavelengths in a single optical fiber is realized. In the optical module provided by the application, only through the second lens component and the optical demultiplexing component arranged in the second accommodating cavity, the beam splitting of one beam of signal light with different wavelengths is completed, and the coupling precision of the optical module when multiple channels are coupled is improved.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

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

fig. 2 is a schematic diagram of an optical network terminal structure;

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

fig. 4 is an exploded schematic view of an optical module according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of the first optical module provided in the embodiment of the present application after the upper shell, the lower shell and the unlocking component are removed;

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

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

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

FIG. 9 is a diagram of a first lens assembly according to an embodiment of the present application;

fig. 10 is a schematic diagram of an optical multiplexing device according to an embodiment of the present application;

FIG. 11 is a schematic diagram of an exploded structure of a second optical module according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a second optical module according to an embodiment of the present application after the upper housing, the lower housing, and the unlocking component are removed;

FIG. 13 is a perspective view of a second first lens assembly according to an embodiment of the present application;

FIG. 14 is a schematic cross-sectional view of a second first lens assembly according to an embodiment of the present application;

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

FIG. 16 is a schematic diagram of an exploded structure of a third optical module according to an embodiment of the present application;

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

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

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

FIG. 20 is an exploded view of a second lens assembly according to a third embodiment of the present application;

FIG. 21 is an exploded view of a second lens assembly according to an embodiment of the present application;

FIG. 22 is an exploded view of yet another second lens assembly according to an embodiment of the present application;

FIG. 23 is an exploded view of a second lens assembly according to an embodiment of the present application;

fig. 24 is a schematic diagram of operation of an optical demultiplexing device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

One of the key links of optical fiber communication is the mutual conversion of optical signals and electric signals. The optical fiber communication uses the optical signal carrying information to transmit in the information transmission equipment such as optical fiber/optical waveguide, and the information transmission with low cost and low loss can be realized by utilizing the passive transmission characteristic of the light in the optical fiber/optical waveguide; in order to establish an information connection between an information transmission device such as an optical fiber and an information processing device such as a computer, it is necessary to perform interconversion between an electric signal and an optical signal.

The optical module realizes the function of the mutual conversion of the optical signal and the electric signal in the technical field of optical fiber communication, and the mutual conversion of the optical signal and the electric signal is the core function of the optical module. The optical module is electrically connected with an external upper computer through a golden finger on an internal circuit board of the optical module, and main electrical connection comprises power supply, I2C signals, data signals, grounding and the like; the electrical connection mode realized by the golden finger has become the mainstream connection mode of the optical module industry, and on the basis of the main connection mode, the definition of pins on the golden finger forms various industry protocols/specifications.

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 among 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 with a remote server, one end of the network cable 103 is connected with local information processing equipment, and the connection between the local information processing equipment 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 made by the optical network terminal 100 having the optical module 200.

The optical port of the optical module 200 is externally connected to the optical fiber 101, and bidirectional optical signal connection is established with the optical fiber 101; the electrical port of the optical module 200 is externally connected into the optical network terminal 100, and bidirectional electrical signal connection is established with the optical network terminal 100; the method comprises the steps that the mutual conversion of optical signals and electric signals is realized in an optical module, so that information connection is established between an optical fiber and an optical network terminal; specifically, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input to the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input to the optical fiber.

The optical network terminal is provided with an optical module interface 102, which is used for accessing the optical module 200 and establishing bidirectional electric signal connection with the optical module 200; the optical network terminal is provided with a network cable interface 104 which is used for accessing the network cable 103 and establishing bidirectional electric signal connection with the network cable 103; the optical module 200 and the network cable 103 are connected through the optical network terminal 100, specifically, the optical network terminal transmits signals from the optical module to the network cable, and transmits signals from the network cable to the optical module, and the optical network terminal is used as an upper computer of the optical module to monitor the operation of the optical module.

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

Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network terminal 100 is an upper computer of the optical module 200, and provides data signals to the optical module 200 and receives data signals from the optical module 200, and the optical network terminal is an optical line terminal or the like as a common upper computer of the optical module 200.

Fig. 2 is a schematic diagram of an optical network terminal structure. As shown in fig. 2, the optical network terminal 100 includes a circuit board 105, and a cage 106 is provided on a surface of the circuit board 105; an electrical connector is arranged in the cage 106 and is used for accessing an optical module electrical port such as a golden finger; the cage 106 is provided with a heat sink 107, and the heat sink 107 has a convex structure such as fins that increase a heat dissipation area.

The optical module 200 is inserted into an optical network terminal, in particular an 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 positioned 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 heat generated by the optical module 200 is conducted to the cage through the optical module housing and finally diffused through the heat sink 107 on the cage.

Fig. 3 is a schematic structural diagram of an optical module 200 according to an embodiment of the application, and fig. 4 is an exploded structural diagram of the optical module 200 according to an embodiment of the application. As shown in fig. 3 and 4, the optical module 200 provided in the embodiment of the application includes an upper housing 201, a lower housing 202, an unlocking member 203, and a circuit board 300.

The upper case 201 is covered on the lower case 202 to form a packing cavity having two openings, and the outer contour of the packing cavity generally takes the shape of a square body. Specifically, the lower housing 202 includes a main board and two side boards located at two sides of the main board and perpendicular to the main board; the upper shell 201 comprises a cover plate which is covered on two side plates of the upper shell 201 to form a wrapping cavity; the upper case 201 may further include two sidewalls disposed at both sides of the cover plate and perpendicular to the cover plate, and the two sidewalls are combined with the two side plates to realize the covering of the upper case 201 on the lower case 202.

The two openings can be two ends openings (204, 205) in the same direction or two openings in different directions; one opening is an electric port 204, and a golden finger of the circuit board 300 extends out from the electric port 204 and is inserted into an upper computer such as an optical network terminal, the other opening is an optical port 205, and is used for connecting an optical transceiver inside the optical module 200 by external optical fiber access, and photoelectric devices such as the circuit board 300 and the optical transceiver are positioned in a packaging cavity.

The upper shell 201 and the lower shell 202 are combined to be assembled, so that devices such as a circuit board 300 and the like can be conveniently installed in the shells, and the upper shell 201 and the lower shell 202 form an encapsulation protection shell of the outermost layer of the optical module. The upper shell 201 and the lower shell 202 are generally made of metal materials, so that electromagnetic shielding and heat dissipation are facilitated; the housing of the optical module 200 is not generally formed as an integral structure, so that the positioning component, the heat dissipation and the electromagnetic shielding structure cannot be installed when devices such as a circuit board are assembled, and the production automation is not facilitated.

The unlocking component 203 is located on the outer wall of the lower housing 202, and is used for realizing or releasing the fixed connection between the optical module and the host computer.

The unlocking part 203 is provided with a clamping structure matched with the upper computer cage; pulling the distal end of the unlocking member 203 can relatively move the unlocking member 203 on the surface of the outer wall; the optical module is inserted into a cage of the upper computer, and the optical module is fixed in the cage of the upper computer by a clamping structure of the unlocking part 203; by pulling the unlocking part 203, the clamping structure of the unlocking part 203 moves along with the unlocking part, so that the connection relation between the clamping structure and the upper computer is changed, the clamping relation between the optical module and the upper computer is relieved, and the optical module can be pulled out of the cage of the upper computer.

The circuit board 300 is provided with a light emitting chip, a driving chip of the light emitting chip, a light receiving chip, a transimpedance amplifying chip, a limiting amplifying chip, a microprocessor chip and the like, wherein the light emitting chip and the light receiving chip are directly attached to the circuit board of the light module, and the form is called COB package in the industry.

The circuit board 300 connects the electric devices in the optical module together according to the circuit design through circuit wiring so as to realize the electric functions of power supply, electric signal transmission, grounding and the like; while the circuit board 300 also functions as a carrier for the various components, such as the circuit board carrying the lens assembly.

The circuit board is generally a hard circuit board, and the hard circuit board can also realize bearing effect due to the relatively hard material of the hard circuit board, for example, the hard circuit board can stably bear chips; the hard circuit board can also be inserted into an electrical connector in the upper computer cage, specifically, a metal pin/golden finger is formed on one side end surface of the hard circuit board for connection with the electrical connector.

In an embodiment of the present application, the optical module further includes a lens assembly disposed on the circuit board 300. Specifically, the lens assembly and the circuit board 300 form a cavity that encloses the light emitting chip array or the light receiving chip array, which is located in the cavity. The lens assembly is used for transmitting the light beam and changing the transmission direction of the light beam during transmission. In use: light emitted by the optical chip in the optical emission chip array is transmitted and reflected by the lens component and then enters the optical fiber; or, the light from the optical fiber enters the light receiving chip after being reflected by the lens component, and the lens component not only plays a role of sealing the light chip, but also establishes the optical connection between the light chip and the optical fiber. The lens component is covered above the light emitting chip array or the light receiving chip array at the same time, so that the propagation direction of signal light emitted by the light emitting chip or signal light from the outside of the light module can be changed by using fewer devices. In the embodiment of the application, the light emitting chip array is covered by the lens assembly, or the light receiving chip array is covered by the lens assembly, and the light emitting chip array and the light receiving chip array can also be respectively covered by the lens assembly. Further, in the embodiment of the present application, the number of lens assemblies may be 1, 2, or the like.

In the embodiment of the application, the lens assembly may be disposed not only at one end of the circuit board 300 near the optical port, but also in the middle of the circuit board 300, and may be specifically selected according to the actual requirement of the optical module. In the embodiment of the application, the lens component is arranged above the light emitting chip array or the light receiving chip array in a cover mode; wherein: the light emitting chip array comprises a plurality of light emitting chips, and each light emitting chip is generally used for emitting signal light with one wavelength, and then the light emitting chip array is used for emitting a plurality of signal lights with different wavelengths; the light receiving chip array includes a plurality of light receiving chips, and each light receiving chip is generally configured to receive signal light with one wavelength, and further the light receiving chip array is configured to receive a plurality of different signal lights with different wavelengths. The light emitting chip array comprises 2, 3, 4 and other light emitting chips, and the light receiving chip array comprises 2, 3, 4 and other light receiving chips. Specifically, in the present application, the light emitting chips or the 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 one group, a plurality of rows of light emitting chips or light receiving chips are arranged along the width direction of the circuit board, a plurality of rows of light emitting chips or light receiving chips are set as a plurality of groups, and the definition with respect to the length direction and the width direction of the circuit board is defined as the length direction of the circuit board from left to right in fig. 4 and as the width direction of the circuit board from top to bottom in reference to fig. 4.

In this embodiment, two lens assemblies are included, and for convenience of description, one lens assembly is referred to as a first lens assembly, the other lens assembly is referred to as a second lens assembly, further, a lens assembly provided over the light emitting chip array is referred to as a first lens assembly, and a lens assembly provided over the light receiving chip array is referred to as a second lens assembly.

Further, high-speed data transmission requires close arrangement between the optical chips and their driving/matching chips in the optical transmitting chip array or the optical receiving module, so as to shorten the connection lines between the chips and reduce the signal loss caused by the connection lines. The light emitting chip and the driving chip of the light emitting chip are arranged in a short distance in the light emitting chip array, and the lens component covers the light emitting chip and the driving chip of the light emitting chip; the light receiving chip and the transimpedance amplifying chip are arranged in the light receiving chip array in a short distance, and the lens component covers the light receiving chip and the transimpedance amplifying chip.

In order to facilitate the transmission of multiple beams of signal light with different wavelengths emitted by the light emitting chip array and the reception of the signal light with different wavelengths by the light receiving chip array, the embodiment of the application comprises other optical devices matched with the lens assembly. The following detailed description is directed to specific uses of the lens assembly.

The light emitting structure is described below.

In a first embodiment, the present application provides a structure of an optical module and its corresponding optical device; fig. 5 is a schematic structural diagram of the optical module according to the embodiment of the present application after the upper housing, the lower housing and the unlocking member are removed. As shown in fig. 5, the first lens assembly 400 is connected to one end of the optical fiber array 900, the other end of the optical fiber array 900 is connected to the optical fiber adapter 600, and the optical connection with the external optical fiber is achieved by the optical fiber adapter 600. The first lens assembly 400 is disposed on the circuit board 300. The first lens assembly 400 forms a package cavity with the circuit board 300, which is described as a first receiving cavity for convenience of description. 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 to each other by the optical fiber adapter 600.

FIG. 6 is a perspective view of a first lens assembly according to an embodiment of the present application; FIG. 7 is a schematic cross-sectional view of a first lens assembly according to an embodiment of the present application; FIG. 8 is a schematic diagram of an exploded view of a first lens assembly according to an embodiment of the present application; as shown in fig. 6-8, the first lens assembly 400 is typically a transparent plastic piece, typically 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 accommodating optical devices, specifically, a light emitting chip array 440, a first collimating lens array 450 and a light multiplexing assembly 460 are sequentially arranged from the circuit board 300 to the inside of the first accommodating cavity 430. And, the top surface of the first lens assembly 400 is provided with a first reflecting surface 410 and a second reflecting surface 420. The first reflecting surface 410 is used for reflecting the signal light incident thereon, and the second reflecting surface 420 is used for reflecting and converging 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 a plurality of signal lights with different wavelengths, and the first collimating lens array 450 includes a plurality of collimating lenses for collimating the signal lights of the light emitting chip array. The first collimating lens array 450 is disposed over the light emitting chip array 440, and the number of lenses of the first collimating lens array 450 depends on the number of light emitting chips in the light emitting chip array 440, and typically the number of lenses of the first collimating lens array 450 is equal to the number of light emitting chips in the light emitting chip array 440. The optical multiplexing component 460 is disposed on the inner wall of the first accommodating cavity 430, and is configured to combine a plurality of signal lights with different wavelengths into a single signal light, where the optical multiplexing component 460 generally includes a plurality of optical filters, and the optical filters use two sides and different positions to set different film layers to allow transmission of the signal light with a specific wavelength and reflection of the signal light with other wavelengths, and one surface of the optical multiplexing component 460 allows reflection of the signal light with a certain wavelength, and the optical multiplexing component 460 coordinates and selects the number of reflections of each beam according to the number of the beams of the combined beam, so as to finally realize beam combination of the signal lights with different wavelengths.

The first reflecting surface 410 is an inclined surface for reflecting the signal light incident thereon, and the second reflecting surface is disposed in a direction close to the light emitting direction for reflecting and converging the signal light incident thereon into the optical fiber outside the optical module; when the first lens assembly 400 is assembled and fixed to the circuit board 300, the first reflecting surface 410 is disposed at an angle, i.e., inclined, to the circuit board, and the inclination angles of the first reflecting surface 410 and the light multiplexing assembly 460 are related to the thicknesses of the light emitting chips and the light multiplexing assemblies 460 with different wavelengths, alternatively, the inclination angles of the first reflecting surface 410 and the light multiplexing assembly 460 are selected to be between 4 ° and 17 °. Specifically, 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, and the projection of the first reflecting surface 410 in the direction of the circuit board covers the light multiplexing component 460, so that the signal light emitted by the light emitting chips in the light emitting chip array 440 is in a divergent state, and the light signal emitted by the light emitting chips is a divergent light beam. In order to facilitate subsequent optical path design and optical coupling into the fiber, converging treatment of the diverging beam is required. In the present application, divergent light beams are converged into parallel light beams by the collimating lenses, and the parallel light beams are sequentially transmitted to the light multiplexing component 460 and the first reflecting surface 410 after being converged by the collimating lenses in the first collimating lens array 450, light emitted by each collimating lens is incident to different positions of the light multiplexing component 460, the first reflecting surface 410 receives signal light from the light multiplexing component 460 and then changes the propagation direction of the light to reflect the signal light to the surface of the light multiplexing component 460, the signal light with the wavelength and the signal light at other positions of the light multiplexing component 460 are combined and are incident to the first reflecting surface 410, finally, the signal light with different wavelengths is combined into one light beam and transmitted to the second reflecting surface 420, the second reflecting surface 420 changes the propagation direction of the light beam and finally emits the light beam to the outside of the light module, and the signal light with different wavelengths can share one optical fiber to transmit the light emitting module, so as to realize the simultaneous transmission of the signal light with multiple wavelengths in the single optical fiber.

The first reflecting surface 410 is a total reflecting surface, and the signal light emitted by the light emitting chip is transmitted to the first reflecting surface 410 to be totally reflected.

The second reflecting surface 420 is set as an inclined surface, after the signal light after beam combination is transmitted to the second reflecting surface 420, the second reflecting surface 420 needs to achieve reflection and convergence at the same time, in order to achieve reflection and convergence effects at the same time, in the embodiment of the present application, a plurality of protruding structures may be disposed on the surface of the second reflecting surface 420, and the inclined surface of the second reflecting surface 420 has the effect of reflecting the signal light, and the protruding structures may achieve the effect of converging the signal light; in addition, can also be with the one end and the first reflecting surface of second reflecting surface are connected, and the other end is connected with and gathers the lens, and first lens assembly promptly includes the lens that gathers this moment, realizes gathering the effect through setting up the lens that gathers.

In the embodiment of the present application, the surface of the circuit board 300 has a carrying surface, which can carry a plurality of light emitting chips, the light emitting chips are arranged in an array, and the light emitting chips are arranged in the length direction and the width direction of the circuit board, wherein a row of light emitting chips in the length direction are arranged in one group, so that a plurality of groups of light emitting chips can be arranged, and the limitation of the length direction and the width direction of the circuit board is defined as the length direction of the circuit board from left to right and the width direction of the circuit board from top to bottom in fig. 4. As shown in fig. 9, the first collimating lens array 450 in the embodiment of the present application is a stand-type structure, which can carry a plurality of collimating lenses, and has strong stability and good collimating effect; the support structure specifically comprises a main board and two side plates arranged on two sides of the main board, the main board and the two side plates are assembled to form the support structure, the two side plates are in contact with the circuit board, a plurality of collimating lenses are arranged on the surface of the main board, the arrangement of the collimating lenses is consistent with the arrangement mode of the light emitting chips, namely, the collimating lenses are arranged in an array mode, the collimating lenses are arranged in the length direction and the width direction of the circuit board, one row of collimating lenses in the length direction are arranged into one group, thus the arrangement of a plurality of groups of collimating lenses can be realized, the limitation on the length direction and the width direction of the circuit board is defined as the length direction of the circuit board from left to right in fig. 4, and the limitation on the length direction of the circuit board is defined as the width direction of the circuit board from top to bottom. The plurality of groups of collimating lenses receive the signal light from the light emitting chip, perform converging processing on the signal light, and converge the signal light in a divergent state into parallel light beams.

As shown in fig. 8, a wrapping cavity is disposed at one end of the first lens assembly 400 near the light outlet, and an optical fiber socket 401 is disposed in the wrapping cavity, and the optical fiber socket includes: a first connection portion 401a for plugging with the optical fiber cladding; a second connection portion 401b for plugging with the optical fiber protection layer; the third connection portion 401c has a receiving cavity, each optical fiber ribbon may be received by a hub member, which may be a sleeve that wraps the optical fiber ribbon, and then inserted into the receiving cavity of the third connection portion 401 c. As can be seen from the figure, the inner diameters of the first connection portion 401a, the second connection portion 401b and the third connection portion 401c are different, and the interfaces of the first connection portion 401a and the second connection portion 401b are provided with transition connection portions, the interfaces of the second connection portion 401b and the third connection portion 401c are also provided with filtering connection portions, the shape of the optical fiber socket 401 is consistent with the structure of the optical fiber, the optical fiber sequentially comprises a core layer, a cladding layer and a protection layer from inside to outside, the cladding layer of the optical fiber is arranged at the first connection portion 401a, the protection layer of the optical fiber is arranged at the second connection portion 401b, the optical fiber is more in number and softer, and therefore the third connection portion 401c is required for gathering and fixing the optical fiber.

The optical fiber socket 401 and the first lens assembly 400 are integrally formed in the embodiment of the application, so that the relative position of the external optical fiber and the first lens assembly 400 is ensured to be fixed, no position deviation occurs between the external optical fiber and the first lens assembly 400, the coupling precision of the signal light to the optical fiber after beam combination is improved, and the optical coupling efficiency is increased when the signal light is coupled to the external optical fiber from the first lens assembly 400. Finally, the signal light with different wavelengths can share one optical fiber transmission light-emitting module, so that the signal light with multiple wavelengths in a single optical fiber can be transmitted simultaneously.

As shown in fig. 9, the optical multiplexing element 460 includes an optical input port for the light beams of different wavelengths to enter the optical multiplexing element 460, but only one optical output port for the outgoing composite light beam. Assuming that 4 signal lights with wavelengths of λ1, λ2, λ3 and λ4 need to be combined into one signal light, the 4 signal lights needing to be combined are incident to the optical multiplexing component 460 through different light inlets of the optical multiplexing component 460, the λ1 signal light is reflected by the optical multiplexing component 206 and the first reflecting surface 410 for six times to reach the light outlet, the λ2 signal light is reflected by the optical multiplexing component 206 and the first reflecting surface 410 for four times to reach the light outlet, the λ3 signal light is reflected by the optical multiplexing component 206 and the first reflecting surface 410 for two times to reach the light outlet, the λ4 signal light is incident to the optical multiplexing component 206 and then is directly transmitted to the light outlet, and then the signal lights with different wavelengths enter the optical multiplexing component 460 through different light inlets and are output from the optical multiplexing component 460 through the same light outlet. The 4 signal lights with different wavelengths are combined into one beam at the light outlet, then the combined signal lights are transmitted to the optical fiber through the light outlet, and the 4 signal lights with different wavelengths can share one optical fiber transmission light outlet module, so that the simultaneous transmission of the signal lights with multiple wavelengths in a single optical fiber is realized.

In a second implementation, the application also provides a light module with another structure, such as a corresponding first lens component. FIG. 11 is a schematic diagram of an exploded structure of a second optical module according to an embodiment of the present application; fig. 12 is a schematic structural diagram of a second optical module according to an embodiment of the present application after the upper housing, the lower housing, and the unlocking component are removed; FIG. 13 is a perspective view of a second first lens assembly according to an embodiment of the present application; FIG. 14 is a schematic diagram showing a cross-sectional structure of a second lens assembly according to an embodiment of the present application; FIG. 15 is an exploded view of a second first lens assembly according to an embodiment of the present application; specifically, as shown in fig. 10, the structure of the first lens assembly 400 in the present embodiment is different from that in the first embodiment, and fig. 12 clearly shows the structure of the first lens assembly 400 in the present embodiment, and the structure of the first lens assembly 400 in the present embodiment is different from that in the foregoing embodiment in that: in order to define the first bearing surface 470a and the second bearing surface 470b, the first collimating lens array 450 in this embodiment is a flat plate structure, and it is obvious in fig. 16 that the first collimating lens array 450 is a flat plate structure, on which a plurality of collimating lenses are disposed for collimating the signal light emitted by the light emitting chip, one end of the first collimating lens array 450 of the flat plate structure is disposed on the first bearing surface 470a, and the other end of the first collimating lens array 450 of the flat plate structure is disposed on the second bearing surface 470b, the first collimating lens array 450 of the structure is preferably connected with the first lens assembly 400 during packaging, and then is cooperatively covered on the upper end of the light emitting chip array 440, in this embodiment, the first collimating lens array 450, the first bearing surface 470a and the second bearing surface 470b are mutually matched to ensure that the signal light emitted by the light emitting chip in the light emitting chip array 440 emits the signal light in the first direction of the first collimating lens array, and thus ensuring the collimating effect of the light emitting chip array of the first collimating lens array 450 emits the signal light. In the embodiment of the present application, the flat plate structure of the first collimating lens array 450 may be configured as a transverse i-shape, two ends of which are transversely disposed 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 collimating lenses, and the plurality of collimating lenses are disposed on the surface of the main body plate in an array form.

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

For easy assembly, the total length of the first collimating lens array 450 needs to be smaller than the inner diameter length of the first bearing surface 470a to the second bearing surface 470b, that is, the inner walls of the first collimating lens array 450 to the first bearing surface 470a have a certain margin length, and the inner walls of the first collimating lens array 450 to the second bearing surface 470b have a certain margin length.

In a third embodiment, the present embodiment provides an optical module of another structure and its respective optical devices. FIG. 16 is a schematic diagram of an exploded structure of a third optical module according to an embodiment of the present application; FIG. 17 is a schematic cross-sectional view of a third first lens assembly according to an embodiment of the present application; FIG. 18 is a perspective view of a third first lens assembly according to an embodiment of the present application; FIG. 19 is an exploded view of a third first lens assembly according to an embodiment of the present application; FIG. 20 is an exploded view of a second lens assembly according to a third embodiment of the present application; the optical fiber socket and the first lens assembly are integrally arranged in the first embodiment and the second embodiment to realize the transmission of the synthesized signal light to the external optical fiber, and other manners can be adopted to realize the transmission of the synthesized signal light to the external optical fiber. In this embodiment, the transmission of the synthesized signal light into the external optical fiber is achieved by providing the optical fiber holder. The specific implementation mode 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 holder 800, as shown in fig. 18, and further includes a converging lens assembly 700, where the first lens assembly includes a first reflecting surface 410, a second reflecting surface 420, a light emitting chip array 440, a first collimating lens array 450, and a light multiplexing assembly 460, the surfaces of the first reflecting surface 410 and the second reflecting surface 420 are all straight surfaces, and the functions of each device are the same as those of the previous embodiments, and are not repeated herein. The second reflecting surface 420 is disposed at one end near the light outlet, where the converging lens assembly 700 is disposed at one end near the light outlet, and after the signal light synthesized by the optical multiplexing assembly 460 is transmitted to the second reflecting surface 420, the signal light is reflected by the second reflecting surface 420 and coupled to the converging lens assembly 700, and then converged into the optical fiber support 800 by the converging lens assembly 700, where a plurality of optical fiber ribbons are disposed in the optical fiber support 800, and the optical fiber ribbons are connected with the optical fiber adapter 600, so as to implement emission of optical signals.

It should be noted that, the converging lens assembly 700 in the embodiment of the present application may also be disposed at the front end of the optical fiber support 800, the converging lens assembly 700 and the optical fiber support 800 may be configured as an integrated structure, and the converging lens assembly 700 is converged by the converging lens assembly 700 to obtain a converging light spot and then coupled into the optical fiber support 800, where the structure of the optical fiber support 800 includes the converging lens assembly 700, and the converging lens assembly 700 in the foregoing embodiment is disposed between the second reflecting surface 420 and the optical fiber support 800, where the first lens assembly 400 includes the converging lens assembly 700.

As shown in fig. 18-20, one end of the first lens assembly 400 is provided with a bearing table surface, the optical fiber support 800 is arranged on the surface of the bearing table surface, the front end of the first lens assembly 400 is provided with two limiting components 900a, the side surface of the optical fiber support 800 is provided with two butting components 900b, and the butting components 900b are inserted into the corresponding limiting components 900a, so that the connection between the first lens assembly 400 and the optical fiber support 800 is realized; specifically, the limiting component 900a may be set to be in a form of a limiting post, the docking component 900b is set to be formed as a limiting hole, the limiting post is inserted into the corresponding limiting hole to realize the docking of the first lens assembly 400 and the optical fiber support 800, as shown in fig. 20, one end of the first lens assembly 400, which is close to the limiting component 900a, is provided with a boss, the bottom end of the optical fiber support 800 is recessed inwards to form a concave table, the lower surface of the concave table is seated on the boss, two ends of the optical fiber support 800 are provided with two side surfaces of the boss, the upper table surface of the concave table is provided with a mounting groove for mounting an optical fiber ribbon, the mounting groove can fix and limit the optical fiber ribbon, the converging lens assembly 700 is provided with a first light through hole, and the optical fiber support 800 is provided with a second light through hole, and the optical fiber ribbon passes through the optical fiber support along the first light through hole and is placed in the mounting groove.

FIG. 9 is a diagram of a first lens assembly according to an embodiment of the present application; fig. 10 is a schematic diagram of an optical multiplexing device according to an embodiment of the present application; the light emitting chips in the light emitting chip array 440 are arranged in rows in the width direction of the circuit board 300 (the width direction of the first lens assembly 400). As shown in fig. 10, the first collimating lens array 450 disposed in the first receiving cavity 430 of the first lens assembly 400 includes four lenses arranged in a row along the width direction of the first lens assembly 400, the lenses in the first collimating lens array 450 may be used for collimating four signal lights, and the four signal lights collimated by the lenses in the first collimating lens array 450 are folded back between the light multiplexing assembly 460 and the first reflecting surface 410, and finally one signal light including signal lights of different wavelengths is output.

In the embodiment of the present application, the optical multiplexing device 460 utilizes different film layers disposed on two sides and different positions to transmit and reflect the signal light with different wavelengths, so as to combine multiple signal light beams with different wavelengths into one beam. The optical multiplexing component 206 coordinates the selection of the number of reflections per beam based on the number of beams of the combined beam.

Specifically, the signal light emitted by the light emitting chip in the light emitting chip array 440 is transmitted upward and onto the lens in the first collimating lens array 450, and the signal light emitted by the light emitting chip is divergent light and is collimated into parallel light by the lens; the signal light collimated by the first collimating lens array 450 is transmitted to the optical multiplexing component 460, the light beam with one wavelength is transmitted to the first reflecting surface 410 through the optical multiplexing component 460, the light beam with another wavelength is transmitted to the first reflecting surface 410 after being combined by the optical multiplexing component 460, the light beam with another wavelength is transmitted to the optical multiplexing component 460 after being combined by the first reflecting surface 410, the light beam with another wavelength is transmitted to the first reflecting surface 410 after being combined by the optical multiplexing component 460, so that the combination of a plurality of signal lights with different wavelengths is completed, finally, one signal light beam is generated, the signal light beam is reflected by the second reflecting surface 420 and then is transmitted to the optical fiber band, and the signal light with a plurality of wavelengths in a single optical fiber is transmitted simultaneously. In the optical module provided by the application, the combination of a plurality of signal lights with different wavelengths is finished only through the first lens component and the optical multiplexing component arranged in the first accommodating cavity, so that the coupling precision of the optical module when multiple channels are coupled is improved.

The light receiving structure will be described below.

In an embodiment of the present application, the structure of the second lens assembly 500 is similar or identical to that of the first lens assembly 400. For convenience of description, a lens assembly in light emission is defined as a first lens assembly, a lens assembly in light reception is defined as a second lens assembly, and fig. 21 is an exploded view of the second lens assembly according to an embodiment of the present application; fig. 22 is an exploded view of yet another second lens assembly according to an embodiment of the present application. 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 accommodating an optical device, specifically, a light receiving chip array 540, a second collimating lens array 550 and a light demultiplexing assembly 560 are sequentially disposed from the circuit board 300 to the inside of the second accommodating cavity 530. And, the top surface of the second lens assembly 500 is provided with a third reflective surface 520 and a fourth reflective surface 510. The light receiving chip array 540 includes a plurality of light receiving chips for receiving a plurality of signal lights with different wavelengths, wherein the light receiving chips are arranged in an array form, and the light receiving chips are arranged in the length direction and the width direction of the circuit board, wherein one row of light receiving chips in the length direction is arranged as a group, so that the arrangement of a plurality of groups of light receiving chips can be realized, and the limitation of the length direction and the width direction of the circuit board is defined as the length direction of the circuit board from left to right and the width direction of the circuit board from top to bottom in fig. 4. The second collimating lens array 550 includes a plurality of collimating lenses for collimating the signal light output from the optical demultiplexing assembly 560. The second collimating lens array 550 is disposed over the light receiving chip array 540, and the number of lenses of the second collimating lens array 550 depends on the number of light receiving chips in the light receiving chip array 540, and typically the number of lenses of the second collimating lens array 550 is equal to the number of light receiving chips in the light receiving chip array 540. The optical demultiplexing module 560 is disposed on the inner wall of the second accommodating cavity 530, and is configured to split one signal light into a plurality of signal lights with different wavelengths, and the optical demultiplexing module 560 includes a plurality of optical filters. In the embodiment of the present application, the optical demultiplexing component 560 utilizes different film layers disposed on two sides and different positions to transmit and reflect the signal light with different wavelengths, so as to split a beam of signal light with different wavelengths into multiple beams of light. The optical demultiplexing unit 560 selects the number of reflections of each wavelength signal light in coordination according to the wavelength type and the number of split beams of the split light.

Specifically, a beam of signal light with different wavelengths outside the optical module is transmitted to the second lens assembly 500, the beam of signal light is reflected by the third reflecting surface 520 and then is transmitted to the optical demultiplexing assembly 560, wherein a beam with one wavelength is transmitted through the optical demultiplexing assembly 560, a beam with the remaining wavelength is reflected to the fourth reflecting surface 510 and is transmitted to the optical demultiplexing assembly 560 through the fourth reflecting surface 510, a beam with another wavelength is transmitted through the optical demultiplexing assembly 560, and a beam with the remaining wavelength is reflected to the fourth reflecting surface 510, so that the function of splitting a beam of signal light with different wavelengths into a plurality of signal lights with different wavelengths is completed, and the signal lights with different wavelengths are collimated by the second collimating lens array 550 and then sequentially transmitted to the optical receiving chips in the optical receiving chip array, thereby realizing the function of receiving the signal lights with multiple wavelengths in a single optical fiber by the optical module. In the optical module provided by the application, only through the second lens component and the optical demultiplexing component arranged in the second accommodating cavity, the beam splitting of one beam of signal light with different wavelengths is completed, and the coupling precision of the optical module when multiple channels are coupled is improved.

FIG. 23 is an exploded view of a second lens assembly according to an embodiment of the present application; fig. 24 is a schematic diagram of operation of an optical demultiplexing device according to an embodiment of the present application. As shown in fig. 23-24, the optical demultiplexing module 560 includes an optical input port for inputting signal lights of various wavelengths, and includes a plurality of optical output ports for outputting signal lights of one wavelength, each of the optical output ports being for outputting signal lights of one wavelength. Assuming that the second lens assembly 500 is incident with a beam of signal light including four wavelengths of λ1, λ2, λ3 and λ4, the signal light enters the optical demultiplexing assembly 560 through an incident light port of the optical demultiplexing assembly 560, wherein the λ1 signal light reaches a light outlet thereof through six different reflections by the optical demultiplexing assembly 560 and the fourth reflecting surface 510, the λ2 signal light reaches a light outlet thereof through four different reflections by the optical demultiplexing assembly 560 and the fourth reflecting surface 510, the λ3 signal light reaches a light outlet thereof through two different reflections by the optical demultiplexing assembly 560 and the fourth reflecting surface 510, and the λ4 signal light is directly transmitted to the light outlet thereof after being incident into the optical demultiplexing assembly 560, so that the signal light with different wavelengths enters the optical demultiplexing assembly 560 through the same light inlet and is output through different light outlets.

See the first lens assembly 400 for what is not done in this embodiment of the application with respect to the second lens assembly 500.

It should be noted that, the present application provides two lens assembly structures, two collimating lens array structures, two optical fiber sockets and two optical fiber supports, which can be arbitrarily combined to connect the optical signal and the external optical fiber, and the present application is not limited to the three embodiments provided in the present application, and other combined structures are all within the scope of the present application.

In the optical module provided by the application, the first lens component and the circuit board form the accommodating cavity, the accommodating cavity is sequentially provided with the optical emission chip array, the collimating lens array and the optical multiplexing component from bottom to top, the surface of the first lens component is provided with the first reflecting surface and the second reflecting surface, the first reflecting surface and the second reflecting surface can be mutually connected, the optical emission chip array comprises a plurality of optical emission chips, the optical emission chip array can emit a plurality of signal lights with different wavelengths, the signal lights are in a scattering state at the moment, the parallel lights are formed after being collimated and focused by the collimating lens array, the parallel lights with different wavelengths are transmitted to the optical multiplexing component, the light beams with one wavelength are transmitted to the first reflecting surface through the optical multiplexing component, the light beams with one wavelength are transmitted to the first reflecting surface after being combined by the optical multiplexing component, the light beams with the other wavelength are transmitted to the first reflecting surface after being combined by the first reflecting surface, the light beams with the other wavelength are transmitted to the first reflecting surface after being combined by the optical multiplexing component, the signal with the light beams with the other wavelength are transmitted to the first reflecting surface after the signal with the second wavelength, and the signal with the multiple signal with the different wavelengths are finally transmitted to the optical fiber with the multiple wavelengths after the signal with the single wavelength. In the optical module provided by the application, the combination of a plurality of signal lights with different wavelengths is finished only through the first lens component and the optical multiplexing component arranged in the first accommodating cavity, so that the coupling precision of the optical module when multiple channels are coupled is improved.

In the optical module provided by the application, the second lens component and the circuit board form a second accommodating cavity, the light receiving chip array, the collimating lens array and the light demultiplexing component are sequentially arranged in the cavity from bottom to top, the top surface of the second lens component is provided with a third reflecting surface and a fourth reflecting surface, and the third reflecting surface and the fourth reflecting surface can be mutually connected; the light module is characterized in that a beam of signal light with different wavelengths outside the light module is transmitted to the second lens assembly, the beam of signal light is reflected by the third reflecting surface and then is transmitted to the light demultiplexing assembly, wherein the light beam with one wavelength is transmitted through the light demultiplexing assembly, the light beam with the remaining wavelength is reflected to the fourth reflecting surface and is transmitted to the light demultiplexing assembly through the fourth reflecting surface, the light beam with the other wavelength is transmitted through the light demultiplexing assembly, the light beam with the remaining wavelength is reflected to the fourth reflecting surface, so that the light beam with the different wavelengths is separated into a plurality of signal lights with different wavelengths, and the signal lights with different wavelengths are sequentially transmitted to the light receiving chips in the light receiving chip array after passing through the collimating lens array, and the function of the light module for receiving the signal lights with a plurality of wavelengths in a single optical fiber is realized. In the optical module provided by the application, only through the second lens component and the optical demultiplexing component arranged in the second accommodating cavity, the beam splitting of one beam of signal light with different wavelengths is completed, and the coupling precision of the optical module when multiple channels are coupled is improved.

In the present specification, each embodiment is described in a progressive manner, and the same and similar parts of each embodiment are referred to each other, and each embodiment mainly describes differences from other embodiments, and relevant parts refer to part descriptions of method embodiments. It is noted that other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. An optical module, comprising:

a circuit board;

The first lens component is provided with an opening, the opening faces the circuit board, forms a wrapping cavity with the circuit board, and is covered on the light emitting chip array, the light emitting chip array comprises light emitting chips, the surface of the first lens component is provided with a first reflecting surface and a second reflecting surface, the first reflecting surface and the second reflecting surface are inclined surfaces, the light emitting direction of the light emitting chips is upward along the surface of the circuit board, and the first lens component is used for adjusting the transmission direction of light signals emitted by the light emitting chips to be parallel to the surface of the circuit board;

the first reflecting surface is arranged on the inclined inner wall of the first lens assembly and is positioned above the optical multiplexing assembly and used for reflecting the signal light in the wave combining process of the optical multiplexing assembly;

the second reflecting surface is positioned at one side of the first reflecting surface and is used for changing the transmission direction of the signal light after the light multiplexing component is combined;

the light emitting chip array is arranged on the surface of the circuit board and is used for emitting a plurality of signal lights with different wavelengths;

the first collimating lens array is arranged in the wrapping cavity, is arranged between the light emitting chip array and the light multiplexing component, and comprises a plurality of collimating lenses, and is used for receiving signal light from the light emitting chip and converging the signal light into parallel light;

The optical multiplexing component is arranged in the wrapping cavity, is arranged on the inclined inner wall of the first lens component facing the circuit board, is arranged on the inner wall of the first lens component opposite to the first reflecting surface, and comprises a reflecting end surface and a transmitting end surface, and realizes wave combination together with the first lens component; the optical multiplexing assembly is used for receiving the signal light from the first collimating lens array, the signal light from each collimating lens is incident to different positions of the optical multiplexing assembly, and a plurality of signal light beams with different wavelengths are combined into one signal light beam together with the first reflecting surface, and the combined signal light beam exceeds the reflecting range of the first reflecting surface so as to be reflected to the second reflecting surface, and is reflected by the second reflecting surface and then emitted to an external optical fiber.

2. The optical module of claim 1, wherein the first collimating lens array comprises a plate and side plates disposed at two ends of the plate, and the plate is integrally formed with both of the side plates.

3. The light module of claim 1 wherein a surface of the second reflective surface is provided with a raised structure.

4. The light module of claim 1 wherein the first reflective surface is an inclined surface and the second reflective surface is an inclined surface.

5. The optical module of claim 1, wherein the first lens assembly has a first fiber optic receptacle at an end thereof adjacent the light exit, the first fiber optic receptacle comprising:

the first connecting part is used for being spliced with the optical fiber cladding;

the second connecting part is used for being spliced with the optical fiber protective layer;

and the third connecting part is used for accommodating the line concentration part for wrapping the optical fiber ribbon.

6. An optical module, comprising:

a circuit board;

the second lens component is provided with an opening, the opening faces the circuit board, forms a wrapping cavity with the circuit board, and is covered on the light receiving chip array, the light receiving chip array comprises light receiving chips, the surface of the second lens component is provided with a third reflecting surface and a fourth reflecting surface, the third reflecting surface and the fourth reflecting surface are inclined surfaces, the light receiving direction of the light receiving chips is downward along the surface of the circuit board, and the second lens component is used for adjusting the transmission direction of received signal light to be parallel to the surface of the circuit board;

The third reflecting surface is used for reflecting the received signal light towards the optical demultiplexing component;

the fourth reflecting surface is arranged on one side of the third reflecting surface, is arranged on the inclined inner wall of the second lens assembly and is positioned above the optical demultiplexing assembly and used for reflecting signal light in the process of branching of the optical demultiplexing assembly;

the second collimating lens array is arranged in the wrapping cavity, is arranged between the light receiving chip array and the light demultiplexing component, and comprises a plurality of collimating lenses, and is used for receiving signal lights emitted from different positions of the light demultiplexing component and converging the signal lights into parallel lights;

the optical demultiplexing component is arranged in the wrapping cavity, is arranged on the inclined inner wall of the second lens component facing the circuit board, is arranged on the inner wall of the second lens component opposite to the fourth reflecting surface, and realizes wave division together with the second lens component; the optical demultiplexing component receives the signal light output from the third reflecting surface, decomposes one beam of signal light into a plurality of beams of signal light with different wavelengths together with the fourth reflecting surface, and transmits each decomposed signal light to the surface of the optical receiving chip array after passing through the second collimating lens array;

The light receiving chip array is arranged on the surface of the circuit board and comprises a plurality of light receiving chips for receiving the signal light from the second collimating lens array.

7. The light module of claim 6 wherein the second collimating lens array comprises a plate and side plates disposed at both ends of the plate, the plate being integrally formed with both of the side plates.

8. The light module of claim 6 wherein a surface of the third reflective surface is provided with a raised structure.

9. The light module of claim 6 wherein the third reflective surface is an inclined surface and the fourth reflective surface is an inclined surface.

10. The optical module of claim 6, wherein an end of the second lens assembly adjacent the light outlet is provided with a second fiber optic receptacle, the second fiber optic receptacle comprising:

a fourth connecting part for being spliced with the optical fiber cladding;

a fifth connecting part for being spliced with the optical fiber protective layer;

and the sixth connecting part is used for accommodating the line concentration part for wrapping the optical fiber ribbon.