CN110501789A - A kind of optical module - Google Patents
A kind of optical module Download PDFInfo
- Publication number
- CN110501789A CN110501789A CN201910812590.0A CN201910812590A CN110501789A CN 110501789 A CN110501789 A CN 110501789A CN 201910812590 A CN201910812590 A CN 201910812590A CN 110501789 A CN110501789 A CN 110501789A
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- China
- Prior art keywords
- optical
- lens subassembly
- light
- lens
- optical fiber
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
Abstract
The invention discloses a kind of optical modules, according to different optical power attenuation requirements, using separated structure, including the first lens subassembly and the second lens subassembly.The top of second lens subassembly is equipped with filter plate, and filter plate is equipped with optical fiber interface far from the side of incidence surface, and the lightray propagation from optical fiber interface is reflected to filter plate, and reflected light travels are in the light-receiving chip array of the second lens subassembly bottom.Reflecting surface is formed on the top of the first lens subassembly, and the lightray propagation that laser chip array issues to reflecting surface generates reflection, and reflected light is projected by light-emitting surface and entered in the optical fiber interface in the second lens subassembly.The optical signal power attenuation degree of first lens subassembly is greater than the optical signal power attenuation degree of the second lens subassembly, first lens subassembly decays to the optical power of the optical signal of laser chip array emitter, it is consistent optical power required by the optical power for being finally coupled into optical fiber interface and optical fiber interface, guarantees optical coupling effect.
Description
Technical field
The present invention relates to technical field of optical fiber communication more particularly to a kind of optical modules.
Background technique
COB (chip On board) technique platform in the encapsulation of optical module product has low cost, high density, high frequency
The advantages such as performance is good, packaging technology is simple, more and more optical modules will be turned by traditional coaxial or micro-optics technique platform
For COB technique platform.Multimode parallel optical fibre encapsulation technology is largely produced using COB production technology platform at present, and
For multimode single fiber bi-directional technology or wavelength-division multiplex technique, since cost and technology etc. factor are not solved well
Certainly, it is not yet realized on COB technique platform.
In order to realize multimode single fiber bi-directional technology on COB technique platform, using multimode single fiber bi-directional technology
In optical module, including laser chip array and light-receiving chip array, the two share an optical fiber interface.Light is realized in optical module
During the transmitting-receiving of signal, the optical signal of laser chip array emitter is penetrated after propagating to optical fiber interface by the first lens array
Out, the transmitting of optical signal is realized；And the optical signal from optical fiber interface then passes through the second lens array by light-receiving chip array
It receives, realizes the reception of optical signal.
The optical module of existing single fiber bi-directional is an integral molding structure, since laser chip array has different luminous function
Rate, when the optical signal coupled into optical fibres interface of different optical powers, so that cannot keep one with optical power needed for optical module product
It causes, i.e., optical signal power required by the optical signal power and optical fiber interface of coupled into optical fibres interface is inconsistent, and then influences light
The optical coupling effect of module.
Summary of the invention
The present invention provides a kind of optical modules, apply optical coupling when on COB technique platform to solve existing optical module
The problem of effect difference.
The present invention provides a kind of optical modules, comprising: circuit board, and, the first lens being attached on the circuit board
Component and the second lens subassembly, the light-emitting surface of first lens subassembly are opposite with the incidence surface of second lens subassembly；
The top of second lens subassembly is equipped with inclined filter plate, and the bottom of second lens subassembly connects equipped with light
Receive chip array；The light-receiving chip array is placed on the circuit board, and is located at the circuit board and described second thoroughly
Between mirror assembly；The side far from the incidence surface of the filter plate is equipped with optical fiber interface, the light from the optical fiber interface
Signal reflects after traveling to the filter plate, in the reflected light travels to the light-receiving chip array of formation；
Inclined reflecting surface is formed on the top of first lens subassembly, and the bottom of first lens subassembly is equipped with laser
Chip array, the laser chip array are placed on the circuit board, and are located at the circuit board and second lens group
Between part；Generate and reflect after the lightray propagation to the reflecting surface that the laser chip array issues, the reflected light of formation by
The light-emitting surface projects, then enters in the optical fiber interface in second lens subassembly via the incidence surface；
The material of first lens subassembly is different with the material of second lens subassembly, first lens subassembly
Optical signal power attenuation degree is greater than the optical signal power attenuation degree of second lens subassembly.
From the above technical scheme, a kind of optical module provided in an embodiment of the present invention, according to different optical power attenuations
It is required that specifically including the first lens subassembly and the second lens subassembly using separated structure.The top of second lens subassembly is equipped with filter
The side of wave plate, the separate incidence surface of filter plate is equipped with optical fiber interface, after the lightray propagation to filter plate from optical fiber interface
It reflects, the reflected light travels of formation are in the light-receiving chip array of the second lens subassembly bottom.First lens group
Reflecting surface is formed on the top of part, generates reflection, the reflection of formation after the lightray propagation to reflecting surface that laser chip array issues
Light is projected by light-emitting surface and is entered in the optical fiber interface in the second lens subassembly.The optical signal power decaying journey of first lens subassembly
Degree is greater than the optical signal power attenuation degree of the second lens subassembly, enables the first lens subassembly to laser chip array emitter
The optical power of optical signal decay, make light function required by the optical power for being finally coupled into optical fiber interface and optical fiber interface
Rate is consistent, and guarantees optical coupling effect.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is optical communication terminal connection relationship diagram；
Fig. 2 is optical network unit structural schematic diagram；
Fig. 3 is a kind of optical module structure schematic diagram provided in an embodiment of the present invention；
Fig. 4 provides optical module decomposition texture schematic diagram for the embodiment of the present invention；
Fig. 5 is the three-dimensional structure diagram of optical module provided in an embodiment of the present invention；
Fig. 6 is the exploded side figure of optical module provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the second lens subassembly provided in an embodiment of the present invention；
Fig. 8 is the structure schematic diagram of the second lens subassembly provided in an embodiment of the present invention；
Fig. 9 is the index path of optical module provided in an embodiment of the present invention；
Figure 10 is the decomposition chart of optical module provided in an embodiment of the present invention；
Figure 11 is the section view decomposition texture schematic diagram of optical module provided in an embodiment of the present invention；
Figure 12 is the cross-sectional view of optical module provided in an embodiment of the present invention；
Figure 13 is the structure schematic diagram of the first lens subassembly provided in an embodiment of the present invention；
Figure 14 is the patch relative position angle of laser chip array provided in an embodiment of the present invention and light-receiving chip array
Spend the biggish schematic diagram of deviation；
Figure 15 is signal when light-receiving chip array provided in an embodiment of the present invention and the second lens subassembly are coupled and aligned
Figure；
Figure 16 is schematic diagram when laser chip array provided in an embodiment of the present invention and the first lens subassembly are coupled and aligned.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The core link of fiber optic communication first is that the conversion of photosignal.Fiber optic communication is existed using the optical signal for carrying information
It is transmitted in optical fiber/optical waveguide, low cost may be implemented using the passive transmission characteristic of light in a fiber, low-loss information passes
It is defeated.And the information processing equipments such as computer are using electric signal, this just need to realize in signals transmission electric signal with
The mutual conversion of optical signal.
Optical module realizes above-mentioned photoelectric converting function in technical field of optical fiber communication, and optical signal and the mutual of electric signal turn
Change be optical module core function.Optical module realizes being electrically connected between external host computer by the golden finger on circuit board,
Main electrical connection includes power supply, I2C signal, transmission data-signal and ground connection etc., and the electric connection mode that golden finger is realized is
Through becoming the standard mode of optical module industry, based on this, circuit board is technical characteristic indispensable in most of optical module.
Fig. 1 is optical communication terminal connection relationship diagram.As shown in Figure 1, the connection of optical communication terminal mainly includes light net
Network unit 100, optical module 200, optical fiber 101 and cable 103；
One end of optical fiber connects remote server, and one end of cable connects local information processing equipment, local information processing
The connection of equipment and remote server is completed by the connection of optical fiber and cable；And the connection between optical fiber and cable is by with optical mode
The optical network unit of block is completed.
The optical port of optical module 200 is connect with optical fiber 101, is established two-way optical signal with optical fiber and is connect；The electricity of optical module 200
In mouth access optical network unit 100, two-way electric signal is established with optical network unit and is connect；Optical module realizes optical signal and telecommunications
Number mutual conversion, thus realize connection is established between optical fiber and optical network unit；Specifically, from the optical signals of optical fiber
Optical module is input in optical network unit 100 after being converted to electric signal, and the electric signal from optical network unit 100 is turned by optical module
Optical signal is changed to be input in optical fiber.Optical module 200 is the tool realizing photosignal and mutually converting, without processing data
Function, in above-mentioned photoelectric conversion process, information does not change.
Optical network unit has optical module interface 102, for accessing optical module, establishes two-way electric signal with optical module and connects
It connects；There is optical network unit cable interface 104 to establish two-way electric signal for accessing cable with cable and connect；Optical module with
Connection is established by optical network unit between cable, specifically, the signal from optical module is passed to cable by optical network unit,
Signal from cable is passed into optical module, work of the optical network unit as the ipc monitor optical module of optical module.
So far, remote server is by optical fiber, optical module, optical network unit and cable, with local information processing equipment it
Between establish two-way signal transmission channels.
Common information processing equipment includes router, interchanger, electronic computer etc.；Optical network unit is optical module
Host computer provides data-signal to optical module, and receives the data-signal from optical module, and common optical module host computer is also
Optical line terminal etc..
Fig. 2 is optical network unit structural schematic diagram.As shown in Fig. 2, having circuit board 105, In in optical network unit 100
Cage 106 is arranged in the surface of circuit board 105；It is provided with electric connector in cage 106, for accessing the optical modules such as golden finger electricity
Mouthful；Radiator 107 is provided on cage 106, radiator 107 has the bulge-structures such as the fin of increasing heat radiation area.
Optical module 200 is inserted into optical network unit, specially the electric connector in the power port insertion cage 106 of optical module,
The optical port of optical module is connect with optical fiber 101.
Cage 106 is located on circuit board, and the electric connector on circuit board is wrapped in cage；Optical module is inserted into cage
In, by the fixed optical module of cage, the heat that optical module generates is conducted to cage by optical module shell, eventually by cage
Radiator 107 is diffused.
Fig. 3 is a kind of optical module structure schematic diagram provided in an embodiment of the present invention, and Fig. 4 provides optical mode for the embodiment of the present invention
Block decomposition texture schematic diagram.As shown in Figure 3, Figure 4, optical module 200 provided in an embodiment of the present invention includes upper housing 201, lower casing
Body 202, release lever 203, circuit board 300 and lens subassembly 400.
Upper housing and lower case form tool there are two the package cavity being open, and specifically can be and open at unidirectional both ends
Mouth (204,205) is also possible to be open at two in different directions；One of opening is power port 204, for being inserted into light net
In the host computers such as network unit, another opening is optical port 205, is accessed for external fiber to connect internal optical fiber, circuit board
300, the photoelectric devices such as lens subassembly 400 and fiber adapter 500 are located in package cavity.
Upper housing and lower case generally use metal material, are conducive to realize electromagnetic shielding and heat dissipation；Using upper housing, under
The shell of optical module will not be generally made by the assembly method that shell combines convenient for the devices such as circuit board are installed in shell
Integral structure, in this way in devices such as wiring harness plates, positioning element, heat dissipation and electromagnetic armouring structure can not be installed, also not
Conducive to production automation.
Release lever 203 is located at the outer wall of package cavity/lower case 202, pulls the end of release lever that can make to solve
Handle is locked to relatively move in outer wall surface；Optical module is fixed on the cage of host computer by optical module by release lever when being inserted into host computer
In son, by pulling release lever to release the snap-fit relationship of optical module and host computer, so as to by optical module from host computer
Cage in extract out.
Be provided on circuit board 300 light emitting chip, the driving chip of light emitting chip, light-receiving chip, across resistance amplify
Chip, limited range enlargement chip and microprocessor chip etc., wherein light emitting chip and light-receiving chip are directly mounted on optical module
Circuit board on, such form in the industry be known as COB (chip on board) encapsulation.
Lens subassembly 400 is arranged on the circuit board 300, and the top of optical chip, lens are arranged in by the way of being provide with formula
Component 400 and circuit board 300 form the cavity of the optical chips such as package light emitting chip, light-receiving chip.Light emitting chip issues
Light after lens subassembly reflects enter optical fiber in, the light from optical fiber after lens subassembly reflects enter light-receiving chip in,
Lens subassembly not only acts as the effect of sealing optical chip, while also establishing the light connects between optical chip and optical fiber.
High speed data transfers require closely to be arranged between optical chip and its driving/matching chip, with shorten chip it
Between line, reduce the loss of signal caused by line, and lens subassembly 400 is located at the top of optical chip, so lens subassembly
Generally optical chip and its driving/matching chip are provide with simultaneously.So the driving chip of light emitting chip and light emitting chip
Closely it is arranged, lens subassembly is provide with the driving chip of light emitting chip Yu light emitting chip；Light-receiving chip amplifies with across resistance
Chip is closely arranged, and lens subassembly is provide with light-receiving chip and across resistance amplification chip.
The general very little of the size of optical chip, and driving/matching chip size of optical chip is generally very big, especially realizes
Driving/matching chip of 100G or more rate, and the size of lens subassembly is limited, optical chip and its driving/matching chip are set
There are certain limitation, not too many spatial degrees of freedom for seated position.
In order to realize multimode single fiber bi-directional technology on COB technique platform, and it can guarantee optical coupling effect, this hair
Bright embodiment provides a kind of optical module of single fiber bi-directional, the optical texture of the optical module is separated into two structures, using note
It moulds technique and forms two independent lens subassemblies, the patch precision of laser chip array and light-receiving chip array is wanted in reduction
Ask, between laser chip array and light-receiving chip array relative position and angle requirement it is more loose, avoid optical path from occurring inclined
Coupling effect that is poor and influencing optical module.Meanwhile decaying to the optical power of the optical signal of laser chip array emitter, make most
The optical power for being coupled into optical fiber interface eventually is consistent, and is further ensured that optical coupling effect.
Optical module provided in an embodiment of the present invention uses Shooting Technique to its optical texture, easy to produce, at low cost；And
When being produced using the optical texture in optical module provided in an embodiment of the present invention for COB light engine, simple production process is improved
Production yield.The beneficial effect that the optical module provided for the embodiment of the present invention will be further explained can obtain, according to following implementations
The content of example is illustrated the specific structure of optical module.
Fig. 5 is the three-dimensional structure diagram of optical module provided in an embodiment of the present invention, and Fig. 6 is optical mode provided in an embodiment of the present invention
The exploded side figure of block, Fig. 7 are the structural schematic diagram of the second lens subassembly provided in an embodiment of the present invention.
Referring to Fig. 5, Fig. 6 and Fig. 7, in order to realize that multimode single fiber bi-directional technology, the present invention are real on COB technique platform
A kind of optical module of example offer is provided, comprising: circuit board 7, and, the first lens subassembly 1 and second being attached on circuit board 7 is saturating
Mirror assembly 2.Optical module provided in this embodiment will realize that optical signal receives and the optical texture of transmitting is separated into two structures,
Respectively the first lens subassembly 1 and the second lens subassembly 2, by the first lens subassembly 1 for realizing the transmitting of optical signal, by second
Lens subassembly 2 for realizing optical signal reception.
Since the optical texture in optical module provided in this embodiment no longer uses integrally formed structure, but uses and divide
From structure, therefore, for the optical texture for guaranteeing two separation, i.e. the first lens subassembly 1 and the second lens subassembly 2 are able to carry out light
The propagation of signal, the incidence surface 25 of the light-emitting surface 15 of the first lens subassembly 1 and the second lens subassembly 2 is opposite, so that by first
The optical signal that lens subassembly 1 projects is able to enter in the second lens subassembly 2, and by the optical fiber interface 31 in the second lens subassembly 2
It receives.
The reception of optical signal is realized in second lens subassembly 2, the top of the second lens subassembly 2 is equipped with inclined filter plate
21, specifically, forming the bracket 22 with tilt angle at the top of the second lens subassembly 2, filter plate 21 is fixed on bracket
On 22, the mode of glue bonding can be used, so that filter plate 21 is heeling condition, filter plate 21 is for realizing the anti-of optical signal
It penetrates.The bottom of second lens subassembly 2 is equipped with light-receiving chip array 23, and light-receiving chip array 23 is placed on circuit board 7, and
Between circuit board 7 and the second lens subassembly 2.For realize optical signal reception, light-receiving chip array 23 and for realizing
The amplifying circuit for receiving optical signal is located at the underface of filter plate 21, and is fitted on circuit board 7, so that light-receiving chip array
23 optical path is corresponding with the optical path of filter plate 21.
As the optical module of single fiber bi-directional, the reception and transmitting of optical signal are realized by an optical fiber, i.e. the optical fiber both received
Optical signal from the first lens subassembly 1, but the light-receiving chip array 23 into the second lens subassembly 2 emits optical signal, with
It is received by light-receiving chip array 23.For this purpose, optical fiber interface 31 is arranged in the second lens subassembly 2 in the present embodiment.It is filtering
The side of the separate incidence surface 25 of wave plate 21 is equipped with optical fiber interface 31, and the light-emitting window of optical fiber interface 31 and the light of filter plate 21 reflect
Face is opposite, reflects after the lightray propagation from optical fiber interface 31 to filter plate 21, and the reflected light travels of formation connect to light
It receives in chip array 23.
Filter plate 21 is tilted along the direction of 31 to the first lens subassembly 1 of optical fiber interface, and tilt angle can be 40 ° to 50 °, is come
Reflection is generated from after the lightray propagation to the filter plate 21 being obliquely installed of optical fiber interface 31, optical path turns 90 °, and reflection direction court
To 23 direction of light-receiving chip array, the reflected light for enabling optical path to turn 90 ° is received by light-receiving chip array 23.
Since the optical signal from optical fiber interface 41 is diverging light, to guarantee optical coupling effect, light loss is avoided the occurrence of, this
In embodiment, the third lens array 4 is equipped between optical fiber interface 31 and filter plate 21.Two optical ports of the third lens array 4
(light inlet and light-emitting window) is opposite with the light receiving surface of the light-emitting window of optical fiber interface 31 and filter plate 21 respectively, by the third lens battle array
Column 4 collimate the optical signal from optical fiber interface 41, and the directional light made is propagated to the direction of filter plate 21.
The direction of propagation of optical signal from optical fiber interface 31 is horizontal direction, to guarantee that the third lens array 4 can be right
Optical signal from optical fiber interface 31 is collimated, and in the present embodiment, the third lens array 4 is vertically arranged, so that coming from light
The optical signal of fine interface 31 can pass through the third lens array 4.
Fig. 8 is the structure schematic diagram of the second lens subassembly provided in an embodiment of the present invention.Optical signal is in filter plate 21
Place is when reflecting, and to avoid optical signal from dissipating, influences optical coupling effect, in the present embodiment, as shown in Figure 6 and Figure 8, connects in light
It receives and is equipped with the second lens array 24 between chip array 23 and filter plate 21, the light inlet and filter plate 21 of the second lens array 24
Relatively, the light-emitting window of the second lens array 24 and light-receiving chip array 23 are opposite.Second lens array 24 is in filter plate 21
Generation reflection is propagated through the optical signal come and is assembled, so that converging light travels in light-receiving chip array 23.
In the present embodiment, the second lens array 24 can be integrally formed by the second lens subassembly 2, the setting of the second lens array 24
At the back side of the second lens subassembly 2, light-receiving chip array 23 is fitted in by the back side of the second lens subassembly 2 towards circuit board 7
On circuit board 7, and make the light sensation of light-receiving chip array 23 facing towards the second lens array 24, so that light-receiving chip array 23
The optical signal after being assembled by the second lens array 24 can be received.
The index path of optical module shown in Figure 9, such as the lightray propagation path of a length of λ 2 of figure medium wave, in the second lens
Lightray propagation path in component 2 are as follows: after the optical signal from optical fiber interface 31 is collimated via the third lens array 4, formed
Parallel light propagation to filter plate 21 after reflect, optical path turns 90 °, and the reflected light of formation is by the convergence of the second lens array 24
Afterwards, the light-receiving chip array 23 for being located at 24 lower section of the second lens array receives.
The propagation of optical signal and the installation of optical fiber interface 31 can be achieved at the same time in second lens subassembly 2, for this purpose, can be by second thoroughly
Mirror assembly 2 is separated into two parts, propagation of the part for realizing optical signal, the peace of another part realization optical fiber interface 31
Dress.
Figure 10 is the decomposition chart of optical module provided in an embodiment of the present invention, and Figure 11 is light provided in an embodiment of the present invention
The section view decomposition texture schematic diagram of module, Figure 12 are the cross-sectional view of optical module provided in an embodiment of the present invention.
Referring to Figure 10, Figure 11 and Figure 12, in the present embodiment, it is equipped with fixed frame 5 in the second lens subassembly 2, fixed frame 5 is along hanging down
Directly it is arranged in the direction of paths, the second lens subassembly 2 is separated into paths cavity 210 and optical fiber fixed cavity
220, paths cavity 210 for realizing propagation of the optical signal from the first lens subassembly 1 in the second lens subassembly 2 and
The propagation of optical signal from optical fiber interface 31, optical fiber fixed cavity 220 is for fixing optical fiber interface 31.
For realizing the received device of optical signal (light-receiving chip array 23, filter plate 21, the second lens array 24 and
Three lens arrays 4) it is located in paths cavity 210, and optical fiber interface 31 and its fixed structure are located at optical fiber fixed cavity 220
It is interior.
Fixation of the fixed frame 5 for realizing the third lens array 4, the light-emitting window of the third lens array 4 and optical fiber interface 31
It is corresponding, to enable the optical signal from optical fiber interface 31 to travel to the third lens array 4, in the present embodiment, on fixed frame 5
Equipped with paths mouth 6, the third lens array 4 is mounted on paths mouth 6, so that the third lens array 4 is passed by optical path
It is corresponding with the light-emitting window of optical fiber interface 31 to broadcast mouth 6.
For optical fiber interface 31 is fixed, in the present embodiment, fiber retention structures are equipped in optical fiber fixed cavity 220
3, optical fiber interface 31 is installed in fiber retention structures 3.When installing optical fiber interface 31, can be opened up in fiber retention structures 3
Multiple V-grooves 33, each V-groove 33 is for fixing an optical fiber interface 31.The fixed form of optical fiber interface 31 and V-groove 33 can
By the way of glue bonding, optical fiber interface 31 is sticked in corresponding V-groove 33.
As shown in figure 12, when fiber retention structures 3 are fixed in optical fiber fixed cavity 220, fiber retention structures 3 with
Fixed frame 5 is bonded, and the gap formed between fiber retention structures 3 and fixed frame 5 is paths mouth 6, for realizing light letter
Number propagation.Optical fiber interface 31 and the third lens array 4 and non-direct contact, the optical signal from optical fiber interface 31 is first in optical fiber
It is propagated in fixed structure 3, then 3 backward light path of output fiber fixed structure is propagated mouth 6 and propagated, that is to say, that come from optical fiber interface
31 optical signal enters back into the third lens array 4 after need to propagating stretch diameter in air, and optical signal is propagated in air
Region be that paths mouth 6 is formed by region.
For the fixation for realizing fiber retention structures 3, avoid fiber retention structures 3 are unstable optical fiber interface 31 is caused to issue
There is deviation in the propagation path of optical signal, influences optical coupling effect, and in the present embodiment, two light are symmetrically arranged on fixed frame 5
Fine fixing piece 32.Two optical fiber fixing pieces 32 are located in optical fiber fixed cavity 220, fiber retention structures 3 towards fixed frame 5
One end is symmetrically arranged with two mounting hole (not shown)s, optical fiber fixing piece 32 is embedded in the mounting hole of fiber retention structures 3,
To fix fiber retention structures 3.
In second lens subassembly 2 provided in an embodiment of the present invention, the second lens array 24 and the third lens array 4 can be adopted
It is integrally formed with the mode of injection molding, filter plate 21 is then fixed in the second lens subassembly 2 by the way of glue bonding.Second thoroughly
The 23 received optical signal of institute of light-receiving chip array comes from optical fiber interface 31, the optical signal from optical fiber interface 31 in mirror assembly 2
The optical power that is required closer to optical module of optical power the light function to optical signal is not therefore needed in the second lens subassembly 2
Rate decays, and the optical signal from optical fiber interface 31 is directly reflected into light-receiving chip array 23.
For this purpose, hollow structure, i.e. paths can be used in the part for realizing lightray propagation of the second lens subassembly 2
Cavity 210 is hollow structure.And the first lens subassembly 1 realizes that the device of transmitting optical signal is for realizing the transmitting of optical signal
Laser chip array 13 is higher than required by optical module in general, the optical power for the optical signal that laser chip array 13 emits is higher
Optical power.Therefore, it is the consistency of the optical power of guarantee optical module, that is, guarantees the optical signal power of coupled into optical fibres interface 31
It is consistent with optical power required by optical fiber interface 31, need the optical power for emitting laser chip array 13 optical signal to decline
Subtract.
In the present embodiment, for enable the first lens subassembly 1 to laser chip array 13 emit optical signal optical power into
Row decaying, in such a way that the material of the first lens subassembly 1 and the material of the second lens subassembly 2 are different, makes the first lens subassembly 1
Optical signal power attenuation degree be greater than the second lens subassembly 2 optical signal power attenuation degree.
It specifically, is the optical signal power attenuation degree for improving the first lens subassembly 1, the first lens subassembly 1 can be solid
Structure, and other substances are adulterated in the injected plastics material of the first lens subassembly 1, which can be used for the optical power that decays, such as stone
Ink.By adjusting the doping ratio of addition graphite in the injected plastics material of the first lens subassembly 1, difference is realized to adjust optical module
The optical power attenuation of degree makes final so that the optical power of the optical signal of the first lens subassembly 1 transmitting meets the demand of optical module
The optical power for being coupled into optical fiber interface 31 is consistent, and guarantees optical coupling effect.
For realizing the transmitting of optical signal in first lens subassembly 1, referring again to Fig. 5 and Fig. 6, the first lens subassembly 1
Inclined reflecting surface 12 is formed on top.Since the first lens subassembly 1 is solid construction, the mode for forming reflecting surface 12 can
To dig a groove 11 downwards at the top of the first lens subassembly 1, a face of groove 11 is inclined-plane, the inclined direction on the inclined-plane
To be tilted down along close to the second lens subassembly 2 to the direction far from the second lens subassembly 2.The inclined-plane is reflecting surface 12, instead
It penetrates face 12 to be obliquely installed, for realizing the reflection of optical signal, optical path is made to turn 90 °.
The bottom of first lens subassembly 1 is equipped with laser chip array 13, and laser chip array 13 is placed on circuit board 7,
And between circuit board 7 and the second lens subassembly 2.For the transmitting for realizing optical signal, by laser chip array 13 and it is used to drive
The laser circuit driving of dynamic laser chip array 13 is fitted on circuit board 7, and is located at the underface of reflecting surface 12, so that swashing
The light-emitting window of optical chip array 13 is corresponding with reflecting surface 12, and the optical signal emitted convenient for laser chip array 13 can travel to instead
It penetrates on face 12.
Due to the optical module that optical module provided in this embodiment is single fiber bi-directional, the reception of optical signal is realized by an optical fiber
And transmitting.And the optical fiber interface 31 for being used to receive optical signal is arranged in the second lens subassembly 2, therefore, it is necessary to the first lens groups
The optical module that part 1 emits can travel in the optical fiber interface 31 in the second lens subassembly 2.
In the present embodiment, the first lens subassembly 1 and the second lens subassembly 2 are relatively independent optical texture, the first lens
The incidence surface 25 of the light-emitting surface 15 of component 1 and the second lens subassembly 2 is opposite, and the two is fitted on circuit board 7, but at a distance of one section
Distance, so that the optical signal projected by the first lens subassembly 1 enters back into the second lens group after need to propagating a distance in air
In part 2.And in the first lens subassembly 1, lightray propagation path are as follows: the lightray propagation that laser chip array 13 issues is to instead
Reflection is generated after penetrating face 12, optical path turns 90 °, and the direction where reflection direction towards the second lens subassembly 2, so that optical path turns
90 ° of reflected light is projected by light-emitting surface 15, then is entered in the optical fiber interface 31 in the second lens subassembly 2 via incidence surface 25.
In the second lens subassembly 2, due to optical fiber interface 31 light inlet respectively with filter plate 21 and the third lens array 4
It relatively, need to be by filter plate 21 and the so that the optical signal that launches of the first lens subassembly 1 is before entering optical fiber interface 31
Three lens arrays 4, the at this time effect of filter plate 21 are that the optical signal for allowing the first lens subassembly 1 to launch penetrates, using
The third lens array 4 enters optical fiber interface 31 after assembling.
Figure 13 is the structure schematic diagram of the first lens subassembly provided in an embodiment of the present invention.Due to laser chip array
13 optical signals issued are diverging light, to guarantee optical coupling effect, light loss are avoided the occurrence of, in the present embodiment, such as Fig. 6 and Figure 13
It is shown, the first lens array 14 is equipped between laser chip array 13 and reflecting surface 12.The light inlet of first lens array 14
Opposite with the light-emitting window of laser chip array 13, the light-emitting window and reflecting surface 12 of the first lens array 14 are opposite, by the first lens
The optical signal that array 14 emits laser chip array 13 is assembled, and the converging light made is passed to the direction of reflecting surface 12
It broadcasts.
In the present embodiment, the first lens array 14 can be integrally formed by the first lens subassembly 1, the setting of the first lens array 14
At the back side of the first lens subassembly 1, laser chip array 13 is fitted in electricity towards circuit board 7 by the back side of the first lens subassembly 1
On road plate 7, and make the light-emitting window of laser chip array 13 towards the first lens array 14, so that laser chip array 13 issued
Optical signal is propagated to the direction of the first lens array 14.
The direction of propagation for the optical signal that laser chip array 13 issues is from the bottom to top, therefore, to guarantee the first lens array
The optical signal that column 14 can issue laser chip array 13 is assembled, in the present embodiment, the first lens array 14 is horizontal
It places, the optical signal vertically propagated that laser chip array 13 is issued passes through the first lens array 14.
The index path of optical module shown in Figure 9, such as the lightray propagation path of a length of λ 1 of figure medium wave, the first lens group
The propagation path of the transmitting optical signal of part 1 are as follows: after the optical signal that laser chip array 13 issues is assembled via the first lens array 14,
The converging light of formation generates reflection after traveling to reflecting surface 12, and optical path turns 90 °, and the reflected light of formation is projected by light-emitting surface 15, In
Entered in the second lens subassembly 2 after air borne a distance by incidence surface 25, optical signal enters third after penetrating filter plate 21
Lens array 4 is assembled, and the converging light of formation enters in optical fiber interface 31.
The embodiment of the present invention provides optical module, what the first lens subassembly 1 therein needed to emit laser chip array 13
The optical power of optical signal decays, so that the coupled optical power of optical module is consistent, connects even if being finally coupled into optical fiber
The optical power of mouth 31 is consistent with optical power required by optical fiber interface 31.Previous embodiment is used in the first lens subassembly 1
Injected plastics material in add the mode of the material for the optical power that can be used for decaying such as graphite, and in other embodiments, also can be used
The mode of plating decaying film on reflecting surface 12.
Specifically, in the present embodiment, decaying film is coated on reflecting surface 12, decaying film is used to send out laser chip array 13
The optical power of optical signal out decays, so that the optical signal that laser chip array 13 emits is traveling to the progress of reflecting surface 12
When reflection, while decaying to the optical power of optical signal.It, can be according to the demand optical power of optical module, In in practical plated film
Plating has the decaying film that can be realized with the consistent attenuation degree of the coupled optical power of optical module on reflecting surface 12, so that by anti-
Optical signal after penetrating the reflection of face 12 and decay power can satisfy the demand of optical module, the i.e. light of the transmission of optical fiber interface 31 optical signal
Power requirement guarantees optical coupling effect.
In order to enable the first lens subassembly 1 to decay the optical power for the optical signal that laser chip array 13 emits,
The mode of the plating decaying film on the first lens array 14 also can be used.If 24 phase of the first lens array 14 and the second lens array
Away from relatively closely, when carrying out plating decaying film to the first lens array 14, easily it is plated on the second lens array 24.And the second lens array
Carry out optical power attenuation is not required here for realizing the convergence of the optical signal from optical fiber interface 31 in column 24.If the second lens
It is coated with decaying film on array 24, the optical power for receiving optical signal can be reduced again, lead to the received light of light-receiving chip array 23
Signal power is different from coupled optical power needed for optical module, influences coupling effect.
Therefore, in the present embodiment, by the second lens array 24 far from the first lens array 14.It is provided in an embodiment of the present invention
Optical module uses separated structure, and the first lens subassembly 1 is separated by a certain distance with the second lens subassembly 2, so that the first lens array
14 and second lens array 24 also a distance away, it is possible to avoid the plating when plating decaying film to the first lens array 14
Onto the second lens array 24, decline in the first lens subassembly 1 of guarantee to the optical power for the optical signal that laser chip array 13 emits
In the case where subtracting, it not will lead to the second lens subassembly 2 and the optical power of optical signal had an impact, and then can guarantee optical module
Optical coupling effect.
The optical texture of optical module is separated into two using isolated structure by optical module provided in an embodiment of the present invention
Part, respectively the first lens subassembly 1 and the second lens subassembly 2.The laser chip array 13 of the lower section of first lens subassembly 1 and the
The mode that the light-receiving chip array 23 of two lens subassemblies, 2 lower section is all made of fitting attaches on circuit boards, and is to guarantee optical mode
The optical coupling effect of block, it is very high to the patch required precision of laser chip array 13 and light-receiving chip array 23, so that laser
The light-emitting window of chip array 13 can be opposite with the first lens subassembly 1, makes the light inlet and second of light-receiving chip array 23 thoroughly
Mirror assembly 2 is opposite.
Due in the first lens subassembly 1 the first lens array 14 and reflecting surface 12 with the one of the first lens subassembly 1 at
Type, the second lens array 24 and filter plate 21 in the second lens subassembly 2 are integrally formed with the second lens subassembly 2, so that the
Optical path between one lens array 14 and reflecting surface 12 is stable, between the second lens array 24 and filter plate 21 optical path
It is stable, is not in deviate.And if the relative position of laser chip array 13 and light-receiving chip array 23 occurs
Deviation, then will lead to laser chip array 13 and the optical path of the first lens array 14 deviates, and, lead to light-receiving core
Chip arrays 23 and the optical path of the second lens array 24 deviate, it will influence optical coupling effect.
As it can be seen that when the relative position tolerance of laser chip array 13 and light-receiving chip array 23 is larger, such as tolerance
When greater than 7 μm, will lead to laser chip array 13 and light-receiving chip array 23 can not couple with fiber array simultaneously, can
It can will appear that laser couples and light-receiving chip array 23 can not be coupled to best situation, either conversely, the two
Best situation can not be coupled to.
To avoid laser chip array 13 and the relative position of light-receiving chip array 23 from deviation occur, guarantee optical module
Optical texture is separated into the first lens subassembly 1 and the second lens group by optical coupling effect, optical module provided in an embodiment of the present invention
Part 2.Optical texture in optical module uses separated structure, can reduce to laser chip array 13 and light-receiving chip array 23
Patch required precision, between laser chip array 13 and light-receiving chip array 23 relative position and angle requirement compared with
Pine can reduce paster technique difficulty.
Specifically, the patch relative position angle of laser chip array 13 as shown in figure 14 and light-receiving chip array 23
The biggish schematic diagram of deviation.When specific coupling, the second lens subassembly 2 is coupled on light-receiving chip array 23 respectively, and,
First lens subassembly 1 is coupled on laser chip array 13, i.e., makes light-receiving chip array 23 and the second lens subassembly 2 respectively
It is coupled and aligned, and, so that laser chip array 13 is coupled and aligned with the first lens subassembly 1.
Schematic diagram when light-receiving chip array 23 and the second lens subassembly 2 as shown in figure 15 is coupled and aligned, according to light
The coupling optical path for receiving chip array 23 and the second lens array 24, by the second lens array 24 and 23 coupling of light-receiving chip array
Close alignment, realization the second lens subassembly 2 is coupled on light-receiving chip array 23, at this time the angle of the second lens subassembly 2 and
Position couples unanimously with light-receiving chip array 23.
Schematic diagram when laser chip array 13 and the first lens subassembly 1 as shown in figure 16 is coupled and aligned, according to laser
First lens array 14 is coupled and aligned by the coupling optical path of chip array 13 and the first lens subassembly 1 with laser chip array 13,
First lens subassembly 1 is coupled on laser chip array 13 by realization, at this time the angles and positions and laser of the first lens subassembly 1
Chip array 13 is consistent.
First lens subassembly 1 of separation is coupled and aligned laser chip array 13, and, the second lens subassembly 2 is coupled
The first lens subassembly 1 and the second lens subassembly 2 after being directed at light-receiving chip array 23, then after being coupled and aligned are aligned, so that
The incidence surface 25 of the light-emitting surface 15 of first lens subassembly 1 and the second lens subassembly 2 is opposite, forms the optical texture of optical module, can
To guarantee the coupling effect of optical module.
From the above technical scheme, a kind of optical module provided in an embodiment of the present invention, according to different optical power attenuations
It is required that specifically including the first lens subassembly 1 and the second lens subassembly 2 being attached on circuit board 7 using separated structure.Second
The top of lens subassembly 2 is equipped with filter plate 21, and the side of the separate incidence surface 25 of filter plate 21 is equipped with optical fiber interface 31, comes from light
It is reflected after the lightray propagation to filter plate 21 of fine interface 31, the reflected light travels of formation are to positioned at the second lens subassembly 2
In the light-receiving chip array 23 of bottom.Reflecting surface 12 is formed on the top of the first lens subassembly 1, what laser chip array 13 issued
Reflection is generated after lightray propagation to reflecting surface 12, the reflected light of formation is projected by light-emitting surface 15 and enters the second lens subassembly 2
In interior optical fiber interface 31.The optical signal power attenuation degree of first lens subassembly 1 is greater than the optical signal function of the second lens subassembly 2
Rate attenuation degree enables the first lens subassembly 1 to decay the optical power for the optical signal that laser chip array 13 emits,
It is consistent the optical power for being finally coupled into optical fiber interface 31 with optical power required by optical fiber interface 31, guarantees optical coupling
Effect.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of optical module characterized by comprising circuit board, and, the first lens subassembly being attached on the circuit board
With the second lens subassembly, the light-emitting surface of first lens subassembly is opposite with the incidence surface of second lens subassembly；
The top of second lens subassembly is equipped with inclined filter plate, and the bottom of second lens subassembly is equipped with light-receiving core
Chip arrays；The light-receiving chip array is placed on the circuit board, and is located at the circuit board and second lens group
Between part；The side far from the incidence surface of the filter plate is equipped with optical fiber interface, the optical signal from the optical fiber interface
It is reflected after traveling to the filter plate, the reflected light travels of formation to the light-receiving chip array；
Inclined reflecting surface is formed on the top of first lens subassembly, and the bottom of first lens subassembly is equipped with laser chip
Array；The laser chip array is placed on the circuit board, and be located at the circuit board and first lens subassembly it
Between；Reflection is generated after the lightray propagation to the reflecting surface that the laser chip array issues, the reflected light of formation is by described
Light-emitting surface projects, then enters in the optical fiber interface in second lens subassembly via the incidence surface；
The material of first lens subassembly is different with the material of second lens subassembly, the light letter of first lens subassembly
Number power attenuation degree is greater than the optical signal power attenuation degree of second lens subassembly.
2. optical module according to claim 1, which is characterized in that include for declining in the material of first lens subassembly
The substance of dim light power.
3. optical module according to claim 1, which is characterized in that the surface of the reflecting surface is coated with decaying film, described to decline
The optical power for subtracting optical signal of the film for issuing to the laser chip array decays.
4. optical module according to claim 1, which is characterized in that be equipped with the between the optical fiber interface and the filter plate
Three lens arrays, the optical signal from the optical fiber interface occur after traveling to the filter plate via the third lens array
Reflection.
5. optical module according to claim 1, which is characterized in that between the light-receiving chip array and the filter plate
It equipped with the second lens array, is reflected in the filter plate, the reflected light of formation is traveled to via second lens array
In the light-receiving chip array.
6. optical module according to claim 1, which is characterized in that set between the laser chip array and the reflecting surface
There is the first lens array, the optical signal that the laser chip array issues travels to the reflection via first lens array
Reflection is generated behind face, the reflected light of formation is projected by the light-emitting surface.
7. optical module according to claim 1, which is characterized in that fixed frame is equipped in second lens subassembly, it is described
Second lens subassembly is separated into paths cavity and optical fiber fixed cavity by fixed frame, and the paths cavity is used for
Realize the propagation of the optical signal from first lens subassembly and the propagation of the optical signal from the optical fiber interface, the light
Fine fixed cavity is for fixing the optical fiber interface.
8. optical module according to claim 7, which is characterized in that the fixed frame is equipped with paths mouth, the light
Road propagates mouth and installs the third lens array, and the third lens array is gone out by the paths mouth and the optical fiber interface
Optical port is corresponding.
9. optical module according to claim 7, which is characterized in that be equipped with optical fiber fixed knot in the optical fiber fixed cavity
Structure is equipped with the optical fiber interface in the fiber retention structures.
10. optical module according to claim 9, which is characterized in that be symmetrically arranged with two optical fiber on the fixed frame and fix
Part, two optical fiber fixing pieces are located in the optical fiber fixed cavity, and the optical fiber fixing piece is embedded in the optical fiber fixed knot
Structure, with the fixation fiber retention structures.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812590.0A CN110501789A (en) | 2019-08-30 | 2019-08-30 | A kind of optical module |
| CN202010048813.3A CN112444923A (en) | 2019-08-30 | 2020-01-16 | Optical module |
| PCT/CN2020/111499 WO2021037085A1 (en) | 2019-08-30 | 2020-08-26 | Optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812590.0A CN110501789A (en) | 2019-08-30 | 2019-08-30 | A kind of optical module |
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| Publication Number | Publication Date |
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| CN110501789A true CN110501789A (en) | 2019-11-26 |
Family
ID=68590633
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910812590.0A Pending CN110501789A (en) | 2019-08-30 | 2019-08-30 | A kind of optical module |
| CN202010048813.3A Pending CN112444923A (en) | 2019-08-30 | 2020-01-16 | Optical module |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010048813.3A Pending CN112444923A (en) | 2019-08-30 | 2020-01-16 | Optical module |
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Application publication date: 20191126 |