CN113296201A

CN113296201A - Optical assembly, optical module and working method

Info

Publication number: CN113296201A
Application number: CN202110557239.9A
Authority: CN
Inventors: 秦思凯; 洪肇凯; 夏兴胜; 敬良才
Original assignee: Fujian ZK Litecore Ltd
Current assignee: Fujian ZK Litecore Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-08-24
Anticipated expiration: 2041-05-21
Also published as: CN113296201B

Abstract

The invention relates to an optical assembly which comprises an optical platform, a plurality of ceramic ferrules, a plurality of ceramic sleeves, a plurality of front covers, a plurality of magnetic rings and a plurality of isolators, wherein the ceramic ferrules, the ceramic sleeves, the front covers, the magnetic rings and the isolators are arranged in the optical platform. The optical platform is internally integrated with a plurality of optical interfaces, so that the space between the light emitting channels can be effectively reduced, the volume of the light emitting assembly is greatly reduced, the module layout pressure is relieved, and the light emitting assembly and the light receiving assembly are simultaneously arranged on one circuit board; the optical assembly is high in integration level and small in size, can be applied to an 8-channel optical module, provides a solution for the 8-channel optical module, and widens the application range of the waveguide type wavelength division multiplexer from 4 channels to 8 channels.

Description

Optical assembly, optical module and working method

Technical Field

The invention relates to an optical assembly, an optical module and a working method, and relates to the technical field of optical communication.

Background

With the development of the demand of the optical module in the direction of high density and miniaturization, the volume of the optical module is smaller and smaller, and the number of channels and the number of optical interfaces are gradually increased, which is in the transition from 4 channels to 8 channels. How to implement wavelength division multiplexing or parallel transmission of 4 channels or 8 channels in a limited space brings many difficulties to module layout.

At present, the following three general solutions for multi-wavelength multiplexing are provided: waveguide type, filter type, and polarization combining mode. The waveguide type multiplexing scheme can connect the wavelength division multiplexing optical component and the optical transmitting sub-device through optical fibers, and divides the coupling and multiplexing processes of the optical transmitting component, so that the coupling process is simplified, and the waveguide type multiplexing scheme is adopted by many optical module manufacturers, such as a four-channel coarse wavelength division multiplexing QSFP optical module disclosed in patent CN 107479150B. However, in the conventional scheme, several separate optical transmitting sub-devices are respectively connected to the input ports of the wdm chip through optical fibers, and the separate optical transmitting sub-devices have a large volume, and can only realize multiplexing or parallel transmission of at most 4 channels, and often need to add a circuit board to arrange the optical receiving components or other electrical components, which increases the module cost.

Disclosure of Invention

In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an optical module, an optical module and a working method.

In order to solve the technical problems, the technical scheme of the invention is as follows: an optical assembly comprises an optical platform, a plurality of ceramic ferrules, a plurality of ceramic sleeves, a plurality of front covers, a plurality of magnetic rings and a plurality of isolators, wherein the ceramic ferrules, the ceramic sleeves, the magnetic rings and the isolators are arranged inside the optical platform, one end of the optical platform is provided with a plurality of through holes which are regularly arranged, the ceramic ferrules, the ceramic sleeves, the front covers, the magnetic rings and the isolators corresponding to wavelengths are bonded together through glue inside each through hole, an optical interface is formed, and the optical interface array is formed by the optical interfaces.

Preferably, the through hole of the optical platform is divided into 4 sections, and the inner diameter of each section is respectively matched with the outer diameters of the corresponding front cover, the ceramic sleeve, the ceramic ferrule and the magnetic ring.

Preferably, the inner diameters of the corresponding through hole sections of the front cover and the ceramic sleeve are the same, and the inner diameters of the corresponding through hole sections of the ceramic ferrule and the magnetic ring are the same; the front cover, the ceramic sleeve, the ceramic ferrule and the magnetic ring are respectively and sequentially bonded and fixed with the parts corresponding to the through holes of the optical platform from left to right along the axial direction by using glue, wherein one part of the ceramic ferrule is embedded in the ceramic sleeve.

Preferably, the inner edge of the left side of the front cover is chamfered by 5-20 degrees so as to facilitate the connection of the external ceramic ferrule and the optical interface.

Preferably, the right end face of the ceramic ferrule is ground by an angle of 4-10 degrees, and the isolator is bonded to the center of the face through glue, so that the right end face of the isolator and the light-passing face form the same angle, and reflection is reduced; the optical platform is also provided with a PCB bonding surface, an LD bonding surface, a mPD and a lens bonding surface; one end of the optical platform is provided with 4 through holes which are arranged in a horizontal equal-height and equal-interval mode.

Preferably, the isolator is fixedly bonded with the magnetic ring, and the isolator is cut at an angle of 4-10 degrees, so that the right end face of the isolator forms a certain angle with the vertical light passing surface, and reflection is reduced; the optical platform is also provided with a PCB bonding surface, an LD bonding surface, an mPD, a lens and a turning prism bonding surface; the number of the through holes of the optical platform is 8, the through holes are divided into an upper row and a lower row which are staggered, and 4 through holes in each row are horizontally arranged at high intervals.

An optical module comprises an optical assembly, a MUX assembly, 1 PCB, 4 LDs, 4 LD substrates, 4 mPDs, 1 mPD substrate and 4 lenses; after eutectic crystal between the LD and the LD substrate, the LD and the LD substrate are adhered to the LD bonding surface of the optical platform by glue and are respectively aligned with the centers of the 4 optical interfaces of the optical component; the mPD substrate is adhered to the mPD and the lens adhering surface by glue; the mPD is adhered on the mPD substrate by glue and respectively corresponds to the 4 LDs; the ceramic ferrules of 4 input ends of the MUX assembly are respectively inserted into 4 optical interfaces of the optical assembly, and 1 output end of the MUX assembly is connected with an LC adapter for communicating with other modules; the PCB is adhered to the PCB adhering surface of the optical platform through glue; the LD and the mPD are electrically connected with the PCB through gold wire bonding, so that the functions of light emitting and light emitting power monitoring are realized; the lens focuses light emitted by the LD and couples the light into an optical interface of the optical component, and then the light is input into the MUX, so that the wave combination of 4 wavelengths is realized; the optical module also comprises an optical receiving component, wherein the optical receiving component comprises 1 TIA, 1 PD array of 4 channels and 1 DeMUX component; directly adhering the TIA and the PD array on the PCB by using glue, and realizing the electrical interconnection of the PD and the TIA, and the TIA and the PCB by gold wire bonding; directly bonding the DeMUX on the PCB by using glue after the coupling alignment; the optical module further comprises a shell and a fiber coiling frame, wherein the fiber coiling frame fixes the optical fiber of the MUX in the shell in a reasonable fiber winding mode.

An optical module comprises an optical assembly, an MPO16 optical connection assembly, 1 PCB, 8 LDs, 8 LD substrates, 8 mPDs, 1 mPD substrate, 4 lens I, 4 lens II and 4 turning prisms; after eutectic crystal between the LD and the LD substrate, the LD and the LD substrate are adhered to the LD adhering surface of the optical platform by glue, and respectively correspond to 8 optical interfaces of the optical assembly; the mPD substrate is adhered to the mPD of the optical platform, the lens and the turning prism adhesive surface by glue and is close to the LD; the mPD is adhered on the mPD substrate by glue and respectively corresponds to the 8 LDs; the turning prism is adhered to the mPD of the optical platform, the lens and the bonding surface of the turning prism by glue, is close to the optical interfaces and corresponds to the 4 optical interfaces one by one; the ceramic ferrules of 8 Tx connecting optical fibers of the MPO16 optical connecting component are respectively inserted into 8 optical interfaces of the optical component; the PCB is adhered to the PCB adhering surface of the optical platform through glue; the LD and the mPD are electrically interconnected with the PCB through gold wire bonding; the first lens focuses light emitted by the LD and couples the light into the lower 4 optical interfaces of the optical assembly; the second lens focuses light emitted by the other 4 LDs, and then the light is coupled into the upper 4 optical interfaces of the optical component through the turning prism; the optical module also comprises a housing and a light receiving assembly, wherein the light receiving assembly comprises 2 TIAs, 2 PD arrays of 4 channels and shares an MPO16 optical connection assembly with the light emitting assembly; directly adhering the TIA and the PD array on the PCB by using glue, and realizing the electrical interconnection of the PD and the TIA, and the TIA and the PCB by gold wire bonding; the optical fiber array of the MPO16 optical connecting component is directly adhered to the PCB by glue after being coupled and aligned.

An optical module working method, the optical module in the optical module mainly effects and realizes the conversion from electrical signal to optical signal, 4 LD bonds and bonds to LD bonding surface of the optical module, carry on the electric interconnection through the way of gold wire bonding and PCB, PCB provides the electric current for LD to make it shine, change the electrical signal into the optical signal, its light beam is dispersed and presented Gaussian distribution roughly; 4 mPDs are adhered to one side, close to the LD, of the mPD and the lens adhesion surface of the optical assembly, the photosensitive surface of the mPD faces upwards and is positioned at the position lower than the light outlet of the LD, and as the light emitted by the LD is diffused, a small part of the light emitted by the LD can irradiate the mPD photosensitive surface, an optical signal is converted into an electrical signal and is electrically connected with the PCB through gold wire bonding, so that the monitoring of the luminous power of the LD is realized; most of light emitted from the LD is focused and coupled to the optical interface of the optical component through the lens, then is input into the MUX to realize the wave combination of 4 wavelengths, and finally is output to the optical module through the LC adapter of the MUX component and is communicated with other modules.

The optical module mainly functions to realize the conversion from electrical signals to optical signals; in order to compress the volume of the light emitting component, the optical interfaces of the 8 channels are not at the same horizontal height, but are staggered in an upper row and a lower row; the upper row of light emitting interfaces needs to use a turning prism to adjust a light path, so that the working distance is longer than that of the lower row of light emitting interfaces, and two lenses with different focal lengths need to be selected; the 4 optical interfaces in the lower row select a first lens; the 4 optical interfaces in the upper row adopt a second lens, and the focal length of the second lens is longer than that of the first lens; the first lens directly focuses and couples the light emitted by the corresponding LD into the corresponding lower light emission interface; and the second lens focuses the light emitted from the corresponding LD, then the light passes through the turning prism, two surfaces of the turning prism form an angle of 45 degrees with the horizontal direction, a reflecting film is plated, the light beam focused by the second lens is deflected for a section of displacement, then the light beam passes through the isolator and is coupled into the corresponding ceramic ferrule of the upper light emission interface, and then the light module is output through the MPO16 optical connecting assembly and is communicated with other modules.

Compared with the prior art, the invention has the following beneficial effects: the optical platform is internally integrated with a plurality of optical interfaces, so that the space between the light emitting channels can be effectively reduced, the volume of the light emitting assembly is greatly reduced, the module layout pressure is relieved, and the light emitting assembly and the light receiving assembly are simultaneously arranged on one circuit board; the optical assembly is high in integration level and small in size, can be applied to an 8-channel optical module, provides a solution for the 8-channel optical module, and widens the application range of the waveguide type wavelength division multiplexer from 4 channels to 8 channels.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is an exploded view of an optical module in example 1 of the present invention.

Fig. 2 is an internal sectional view of an optical module in embodiment 1 of the present invention.

Fig. 3 is a schematic view of an optical module in embodiment 2 of the present invention.

FIG. 4 is an internal cross-sectional view of an optical module in example 2 of the present invention

Fig. 5 is a schematic view of an optical module according to embodiment 1 of the present invention.

Fig. 6 is an enlarged view of a portion of fig. 5.

Fig. 7 is a schematic diagram of the optical path of the optical assembly of fig. 5.

Fig. 8 is a front view schematically showing an optical module according to embodiment 2 of the present invention.

Fig. 9 is a partially enlarged view B of fig. 8.

Fig. 10 is a schematic diagram of the optical path of the optical assembly of fig. 8.

Fig. 11 is a reverse side schematic view of an optical module according to embodiment 2 of the present invention.

Detailed Description

The invention is further explained below with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 11, the present embodiment provides an optical assembly, including an optical platform 1, a plurality of ferrules 4, a plurality of sleeves 3, a plurality of front covers 2, a plurality of magnetic rings 6, and a plurality of isolators 5, which are disposed inside the optical platform, one end of the optical platform has a plurality of through holes 7 arranged according to a certain rule, the ferrules, the sleeves, the front covers, the magnetic rings, and the isolators corresponding to wavelengths are bonded together through glue inside each through hole to form an optical interface, and the plurality of optical interfaces form an optical interface array.

In the embodiment of the invention, the through holes of the optical platform are divided into 4 sections, and the inner diameter of each section is respectively matched with the outer diameters of the corresponding front cover, the ceramic sleeve, the ceramic ferrule and the magnetic ring.

In the embodiment of the invention, the inner diameters of the corresponding through hole sections of the front cover and the ceramic sleeve are the same, and the inner diameters of the corresponding through hole sections of the ceramic ferrule and the magnetic ring are the same; the front cover, the ceramic sleeve, the ceramic ferrule and the magnetic ring are respectively bonded and fixed with the parts corresponding to the through hole of the optical platform from left to right in sequence by glue along the axial direction, wherein one part of the ceramic ferrule is embedded in the ceramic sleeve, and the other part of the ceramic ferrule is bonded with the corresponding part in the through hole of the optical platform.

In the embodiment of the invention, the inner edge 12 at the left side of the front cover is chamfered by 5-20 degrees so as to facilitate the connection of the external ceramic ferrule and the optical interface. The isolator is a magneto-optical isolator.

In embodiment 1 of the invention, the right end face 11 of the ceramic ferrule is ground by an angle of 4-10 degrees, and the isolator is bonded to the center of the face through glue, so that the right end face 14 of the isolator and the light-passing face form the same angle, and reflection is reduced; the optical platform is also provided with a PCB bonding surface 8, an LD bonding surface 9, an mPD and a lens bonding surface 10; one end of the optical platform is provided with 4 through holes which are arranged in a horizontal equal-height and equal-interval mode. An optical module comprising an optical assembly 24, a

MUX assembly

25, 1 PCB26, 4

LDs

27, 4

LD substrates

28, 4 mPD29, 1

mPD substrate

30, 4 lenses 31; after eutectic crystal between the LD and the LD substrate, the LD and the LD substrate are adhered to the LD bonding surface of the optical platform by glue and are respectively aligned with the centers of the 4 optical interfaces of the optical component; the mPD substrate is adhered to the mPD and the lens adhering surface by glue; the mPD is adhered on the mPD substrate by glue and respectively corresponds to the 4 LDs; the ceramic ferrules of 4 input ends of the MUX assembly are respectively inserted into 4 optical interfaces of the optical assembly, and 1 output end of the MUX assembly is connected with an LC adapter 33 for communicating with other modules; the PCB is adhered to the PCB adhering surface of the optical platform through glue; the LD and the mPD are electrically connected with the PCB through gold wire bonding, so that the functions of light emitting and light emitting power monitoring are realized; the lens focuses light emitted by the LD and couples the light into an optical interface of the optical component, and then the light is input into the MUX, so that the wave combination of 4 wavelengths is realized; the optical module also includes an optical receive assembly including 1 TIA34, 1 4-

channel PD array

35, and 1 DeMUX assembly 36; directly adhering the TIA and the PD array on the PCB by using glue, and realizing the electrical interconnection of the PD and the TIA, and the TIA and the PCB by gold wire bonding; directly bonding the DeMUX on the PCB by using glue after the coupling alignment; the optical module further comprises a shell and a fiber coiling frame, wherein the fiber coiling frame fixes the optical fiber of the MUX in the shell in a reasonable fiber winding mode. An optical module working method, the optical module in the optical module mainly effects and realizes the conversion from electrical signal to optical signal, 4 LD bonds and bonds to LD bonding surface of the optical module, carry on the electric interconnection through the way of gold wire bonding and PCB, PCB provides the electric current for LD to make it shine, change the electrical signal into the optical signal, its light beam is dispersed and presented Gaussian distribution roughly; 4 mPDs are adhered to one side, close to the LD, of the mPD and the lens adhesion surface of the optical assembly, the photosensitive surface of the mPD faces upwards and is positioned at a position lower than a light outlet of the LD, and as the light emitted by the LD is diffused, a small part of the emitted light 37 of the LD can irradiate the mPD photosensitive surface, an optical signal is converted into an electrical signal and is electrically connected with the PCB through gold wire bonding, so that the monitoring of the luminous power of the LD is realized; most of light 38 emitted from the LD is focused and coupled to the optical interface of the optical module through the lens, and then is input into the MUX to realize the wave combination of 4 wavelengths, and finally, the light module is output through the LC adapter of the MUX module and communicated with other modules. The working principle of the light receiving component is as follows: light with 4 paths of signals output by other modules is input into the optical module through an LC interface, the 4 paths of signal light are separated by the DeMUX and are respectively input into corresponding PDs, the PDs convert optical signals into electric signals, and the electric signals are amplified into voltage signals through the TIA and are input into the PCB. The optical module effectively reduces the distance between the light emitting channels by adopting the optical assembly, thereby greatly reducing the volume of the light emitting assembly, relieving the pressure of module layout and realizing the simultaneous layout of the light emitting assembly and the light receiving assembly on one circuit board.

In embodiment 2 of the invention, the isolator is fixedly bonded with the magnetic ring, and the isolator is cut at an angle of 4-10 degrees, so that the right end face of the isolator forms a certain angle with the vertical light passing surface, and the reflection is reduced; the optical platform is also provided with a PCB bonding surface, an LD bonding surface, an mPD, a lens and a turning prism bonding surface 13; the number of the through holes of the optical platform is 8, the through holes are divided into an upper row and a lower row which are staggered, and 4 through holes in each row are horizontally arranged at high intervals. An optical module comprises an optical assembly, an MPO16

optical connection assembly

40, 1 PCB, 8 LDs, 8 LD substrates, 8 mPDs, 1 mPD substrate, 4

first lenses

46, 4

second lenses

47 and 4 turning prisms 48; after eutectic crystal between the LD and the LD substrate, the LD and the LD substrate are adhered to the LD adhering surface of the optical platform by glue, and respectively correspond to 8 optical interfaces of the optical assembly; the mPD substrate is adhered to the mPD of the optical platform, the lens and the turning prism adhesive surface by glue and is close to the LD; the mPD is adhered on the mPD substrate by glue and respectively corresponds to the 8 LDs; the turning prism is adhered to the mPD of the optical platform, the lens and the bonding surface of the turning prism by glue, is close to the optical interfaces and corresponds to the 4 optical interfaces one by one; the ceramic ferrules of 8 Tx connecting optical fibers of the MPO16 optical connecting component are respectively inserted into 8 optical interfaces of the optical component; the PCB is adhered to the PCB adhering surface of the optical platform through glue; the LD and the mPD are electrically interconnected with the PCB through gold wire bonding; the first lens focuses light emitted by the LD and couples the light into the lower 4 optical interfaces of the optical assembly; the second lens focuses light emitted by the other 4 LDs, and then the light is coupled into the upper 4 optical interfaces of the optical component through the turning prism; the optical module also comprises a housing and a light receiving assembly, wherein the light receiving assembly comprises 2 TIAs, 2 PD arrays of 4 channels and shares an MPO16 optical connection assembly with the light emitting assembly; directly adhering the TIA and the PD array on the PCB by using glue, and realizing the electrical interconnection of the PD and the TIA, and the TIA and the PCB by gold wire bonding; the fiber array 55 of the MPO16 optical connection component is also directly glued to the PCB after coupling alignment. The optical module mainly functions to realize the conversion from electrical signals to optical signals; in order to compress the volume of the light emitting component, the optical interfaces of the 8 channels are not at the same horizontal height, but are staggered in an upper row and a lower row; the upper row of light emitting interfaces needs to use a turning prism to adjust a light path, so that the working distance is longer than that of the lower row of light emitting interfaces, and two lenses with different focal lengths need to be selected; the 4 optical interfaces in the lower row select a first lens; the 4 optical interfaces in the upper row adopt a second lens, and the focal length of the second lens is longer than that of the first lens; the first lens directly focuses and couples the light emitted from the corresponding LD into the corresponding lower light emission interface, as in embodiment 1; and the second lens focuses the light emitted from the corresponding LD, then the light passes through the turning prism, two surfaces 51 of the turning prism form an angle of 45 degrees with the horizontal direction, a reflecting film is plated, the light beam focused by the second lens is deflected for a section of displacement, then the light beam passes through the isolator and is coupled into the corresponding ceramic ferrule of the upper light emission interface, and then the light module is output through the MPO16 optical connecting assembly and is communicated with other modules. The working principle of the light receiving component is as follows: light output by other modules is input to the optical module through an MT interface of an MPO16 optical connection component, the front end of an optical fiber array of the MPO16 optical connection component is ground at an angle of 41-45 degrees, input optical signals are respectively reflected to corresponding PDs, the PDs convert the optical signals into electric signals, and the electric signals are amplified into voltage signals through the TIAs and input to the PCB. The optical module further reduces the distance between the light emitting channels by adopting the optical component, greatly reduces the volume of the light emitting component, and is successfully applied to an 8-channel optical module.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an optical assembly, includes optical platform, arranges inside a plurality of pottery lock pins, a plurality of ceramic sleeve, a plurality of protecgulums, a plurality of magnetic ring and a plurality of isolator of optical platform in, its characterized in that: one end of the optical platform is provided with a plurality of through holes which are arranged according to a certain rule, the ceramic ferrule, the ceramic sleeve, the front cover, the magnetic ring and the isolator with corresponding wavelength are bonded together through glue inside each through hole to form an optical interface, and the plurality of optical interfaces form an optical interface array.

2. The optical assembly of claim 1, wherein: the through hole of the optical platform is divided into 4 sections, and the inner diameter of each section is respectively matched with the outer diameters of the corresponding front cover, the ceramic sleeve, the ceramic ferrule and the magnetic ring.

3. The optical assembly of claim 2, wherein: the inner diameters of the corresponding through hole sections of the front cover and the ceramic sleeve are the same, and the inner diameters of the corresponding through hole sections of the ceramic ferrule and the magnetic ring are the same; the front cover, the ceramic sleeve, the ceramic ferrule and the magnetic ring are respectively and sequentially bonded and fixed with the parts corresponding to the through holes of the optical platform from left to right along the axial direction by using glue, wherein one part of the ceramic ferrule is embedded in the ceramic sleeve.

4. The optical assembly of claim 1, wherein: and the inner edge of the left side of the front cover is chamfered by 5-20 degrees so as to facilitate the connection of the external ceramic ferrule and the optical interface.

5. The optical assembly of any one of claims 1-4, wherein: grinding the right end face of the ceramic ferrule by an angle of 4-10 degrees, and bonding the isolator at the center of the face through glue, so that the right end face of the isolator and the light-passing face form the same angle, and reflection is reduced; the optical platform is also provided with a PCB bonding surface, an LD bonding surface, a mPD and a lens bonding surface; one end of the optical platform is provided with 4 through holes which are arranged in a horizontal equal-height and equal-interval mode.

6. The optical assembly of any one of claims 1-4, wherein: the isolator is fixedly bonded with the magnetic ring, and the isolator is cut at an angle of 4-10 degrees, so that the right end face of the isolator forms a certain angle with the vertical light-passing surface, and reflection is reduced; the optical platform is also provided with a PCB bonding surface, an LD bonding surface, an mPD, a lens and a turning prism bonding surface; the number of the through holes of the optical platform is 8, the through holes are divided into an upper row and a lower row which are staggered, and 4 through holes in each row are horizontally arranged at high intervals.

7. A light module according to claim 5, characterized in that: the optical module comprises an optical component, a MUX component, 1 PCB, 4 LDs, 4 LD substrates, 4 mPDs, 1 mPD substrate and 4 lenses; after eutectic crystal between the LD and the LD substrate, the LD and the LD substrate are adhered to the LD bonding surface of the optical platform by glue and are respectively aligned with the centers of the 4 optical interfaces of the optical component; the mPD substrate is adhered to the mPD and the lens adhering surface by glue; the mPD is adhered on the mPD substrate by glue and respectively corresponds to the 4 LDs; the ceramic ferrules of 4 input ends of the MUX assembly are respectively inserted into 4 optical interfaces of the optical assembly, and 1 output end of the MUX assembly is connected with an LC adapter for communicating with other modules; the PCB is adhered to the PCB adhering surface of the optical platform through glue; the LD and the mPD are electrically connected with the PCB through gold wire bonding, so that the functions of light emitting and light emitting power monitoring are realized; the lens focuses light emitted by the LD and couples the light into an optical interface of the optical component, and then the light is input into the MUX, so that the wave combination of 4 wavelengths is realized; the optical module also comprises an optical receiving component, wherein the optical receiving component comprises 1 TIA, 1 PD array of 4 channels and 1 DeMUX component; directly adhering the TIA and the PD array on the PCB by using glue, and realizing the electrical interconnection of the PD and the TIA, and the TIA and the PCB by gold wire bonding; directly bonding the DeMUX on the PCB by using glue after the coupling alignment; the optical module further comprises a shell and a fiber coiling frame, wherein the fiber coiling frame fixes the optical fiber of the MUX in the shell in a reasonable fiber winding mode.

8. A light module according to claim 6, characterized in that: the MPO16 optical connection component comprises an optical component, an MPO16 optical connection component, 1 PCB, 8 LDs, 8 LD substrates, 8 mPDs, 1 mPD substrate, 4 first lenses, 4 second lenses and 4 turning prisms; after eutectic crystal between the LD and the LD substrate, the LD and the LD substrate are adhered to the LD adhering surface of the optical platform by glue, and respectively correspond to 8 optical interfaces of the optical assembly; the mPD substrate is adhered to the mPD of the optical platform, the lens and the turning prism adhesive surface by glue and is close to the LD; the mPD is adhered on the mPD substrate by glue and respectively corresponds to the 8 LDs; the turning prism is adhered to the mPD of the optical platform, the lens and the bonding surface of the turning prism by glue, is close to the optical interfaces and corresponds to the 4 optical interfaces one by one; the ceramic ferrules of 8 Tx connecting optical fibers of the MPO16 optical connecting component are respectively inserted into 8 optical interfaces of the optical component; the PCB is adhered to the PCB adhering surface of the optical platform through glue; the LD and the mPD are electrically interconnected with the PCB through gold wire bonding; the first lens focuses light emitted by the LD and couples the light into the lower 4 optical interfaces of the optical assembly; the second lens focuses light emitted by the other 4 LDs, and then the light is coupled into the upper 4 optical interfaces of the optical component through the turning prism; the optical module also comprises a housing and a light receiving assembly, wherein the light receiving assembly comprises 2 TIAs, 2 PD arrays of 4 channels and shares an MPO16 optical connection assembly with the light emitting assembly; directly adhering the TIA and the PD array on the PCB by using glue, and realizing the electrical interconnection of the PD and the TIA, and the TIA and the PCB by gold wire bonding; the optical fiber array of the MPO16 optical connecting component is directly adhered to the PCB by glue after being coupled and aligned.

9. A method of operating a light module as claimed in claim 7, characterized in that: the optical module mainly has the functions of converting an electric signal into an optical signal, wherein 4 LDs are adhered to an LD adhering surface of the optical module and are electrically interconnected with a PCB (printed circuit board) in a gold wire bonding mode, the PCB supplies current to the LDs to enable the LDs to emit light, the electric signal is converted into the optical signal, and light beams of the optical signal are diffused and approximately show Gaussian distribution; 4 mPDs are adhered to one side, close to the LD, of the mPD and the lens adhesion surface of the optical assembly, the photosensitive surface of the mPD faces upwards and is positioned at the position lower than the light outlet of the LD, and as the light emitted by the LD is diffused, a small part of the light emitted by the LD can irradiate the mPD photosensitive surface, an optical signal is converted into an electrical signal and is electrically connected with the PCB through gold wire bonding, so that the monitoring of the luminous power of the LD is realized; most of light emitted from the LD is focused and coupled to the optical interface of the optical component through the lens, then is input into the MUX to realize the wave combination of 4 wavelengths, and finally is output to the optical module through the LC adapter of the MUX component and is communicated with other modules.

10. A method of operating a light module as claimed in claim 8, characterized in that: the optical assembly mainly plays a role in converting an electric signal into an optical signal in the optical module; in order to compress the volume of the light emitting component, the optical interfaces of the 8 channels are not at the same horizontal height, but are staggered in an upper row and a lower row; the upper row of light emitting interfaces needs to use a turning prism to adjust a light path, so that the working distance is longer than that of the lower row of light emitting interfaces, and two lenses with different focal lengths need to be selected; the 4 optical interfaces in the lower row select a first lens; the 4 optical interfaces in the upper row adopt a second lens, and the focal length of the second lens is longer than that of the first lens; the first lens directly focuses and couples the light emitted by the corresponding LD into the corresponding lower light emission interface; and the second lens focuses the light emitted from the corresponding LD, then the light passes through the turning prism, two surfaces of the turning prism form an angle of 45 degrees with the horizontal direction, a reflecting film is plated, the light beam focused by the second lens is deflected for a section of displacement, then the light beam passes through the isolator and is coupled into the corresponding ceramic ferrule of the upper light emission interface, and then the light module is output through the MPO16 optical connecting assembly and is communicated with other modules.