CN107121782A - A kind of compact multi-wavelength light component and its application method - Google Patents
A kind of compact multi-wavelength light component and its application method Download PDFInfo
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- CN107121782A CN107121782A CN201710385173.3A CN201710385173A CN107121782A CN 107121782 A CN107121782 A CN 107121782A CN 201710385173 A CN201710385173 A CN 201710385173A CN 107121782 A CN107121782 A CN 107121782A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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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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Abstract
The present invention relates to optical module technical field, there is provided a kind of compact multi-wavelength light component and its application method.Wherein optical assembly includes being located at the lower section for the reflecting surface for being fixed with the speculum at least two groups photo-signal channel unit groups and a substrate, the substrate, is provided with the first diffraction light grid region；Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes the optical signal by each photo-signal channel unit group, and the optical signal transmitted in substrate is being entered by the first diffraction light grid region diffraction, after the total reflection of the base plate bottom, the same convergent point of substrate surface is being converged at；Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions.The present invention compares the mode proposed in background technology, and compactedness more preferably, due to dexterously changing optical axis, substantially increases the utilization rate of substrate space, can place more elements in the admissible space of existing photoelectricity integrated chip.
Description
【Technical field】
The present invention relates to optical module technical field, more particularly to a kind of compact multi-wavelength light component and its user
Method.
【Background technology】
Optical transceiver module is the essential elements device of optical communication field, from initial independent transmitting-receiving to transceiver, system
Integrated degree more and more higher, high-speed, low cost, miniaturization, hot plug, low-power consumption, intellectuality and be at a distance light transmitting-receiving
The developing direction of module.
With 5G development, the explosive growth of internet information amount, to low cost, high-speed (100Gb/s) and it can pass
The demand of defeated longer-distance multidiameter delay single mode optical transceiver module increasingly increases.In recent years, made based on semiconductor technology
Photoelectricity integrated chip is more and more by the concern of industry, in this photoelectricity integrated chip, and optical signal can be carried out at a high speed
Modulation, photodetection conversion, moreover it is possible to preemphasis, equilibrium, amplification and data clock are carried out to electric signal and recovered, this integrated core
Piece meets the minimizing of module, low cost, low-power consumption requirement.
However, silicon is a kind of indirect bandgap material, it is impossible to which directly as photoelectron material, therefore these are highly integrated
The photoelectricity integrated chip of degree needs additional light source.There is United States Patent (USP) using silicon based package light source technology
Coupling unit on U.S.Pat.No.8772704, light source and photoelectricity integrated chip carries out vertical coupled.The light source is by laser
Chip, globe lens, isolator assemblies, speculum and silicon substrate composition.The divergent beams of edge-emitting laser chip output are by saturating
After mirror convergence, after isolator assemblies, speculum, on the coupling unit for impinging perpendicularly on photoelectricity integrated chip.The program has
Have the advantages that compact, encapsulation is simple, but the light source is only capable of providing a wavelength, if realizing many ripples by placing multiple devices
Long light source, volume will be multiplied, and not meet the requirement of the integrated small size of photoelectricity, i.e., the patent formula will in wavelength-division multiplex etc.
The applications that seeking light source has multiple wavelength are restricted.
In addition, in existing document (application number：CN201310322502.1, it is entitled：A kind of high power laser
The optic fibre fixing device of coupling) in also relates to a kind of implementation of multiple-wavelength laser, all linings of high power laser
Bottom, fast axis collimation mirror FAC, slow axis collimating mirror SAC, speculum are separately fixed on the different steps of base, each pole of laser two
Pipe is fixed on one substrate, and multiple laser diodes produce the different light beams of multiple height, by respective fast axis collimation mirror FAC,
The different collimated light beams of height are produced after slow axis collimating mirror SAC；Collimation lens, multiple height are reached after the reflection of respective speculum
Different collimated light beams are focused on optical fiber after collimation lens；Optical fiber fixed position designs a boss on base, and
Boss and base are integrated, and a V-arrangement is designed in the direction of the collimated light beam after being focused in boss upper surface along collimation lens
Groove, optical fiber is positioned in V-shaped groove and filled with glass solder and fixed, this optical fiber fixed form shells the light in covering
From, it is to avoid burn out optical fiber.Heat on glass solder is shed rapidly by base.The program is closed using space by the way of beam,
Multiple wavelength are optically coupled into optical fiber, because coupled light beam is discrete hot spot, will have substantial amounts of after lens focus
Energy distribution is outside main spot, i.e., energy loss is more, especially when optical fiber is single-mode fiber, scheme described in the patent
Insertion Loss it is larger.
【The content of the invention】
The technical problem to be solved in the present invention is by the way of currently existing scheme closes beam using space, by the optocoupler of multiple wavelength
Conjunction enters optical fiber, because coupled light beam is discrete hot spot, will have substantial amounts of Energy distribution in main spot after lens focus
Outside, bring larger energy loss；Especially when optical fiber is single-mode fiber, larger Insertion Loss can be brought.
The present invention is adopted the following technical scheme that：
First aspect present invention includes at least two groups optical signals there is provided a kind of compact multi-wavelength light component, optical assembly
Channel unit group and a substrate, the photo-signal channel unit group are set on the substrate, wherein, one group of photo-signal channel list
Tuple includes lens, non-heterogeneite device and speculum, and three sets gradually on the substrate along optical signal transmission direction,
The optical assembly also includes：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffraction light grid region；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes by each photo-signal channel
The optical signal of unit group, and the optical signal transmitted in substrate is being entered by the first diffraction light grid region diffraction,
After the total reflection of the base plate bottom, the same convergent point of substrate surface is converged at；
Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions.
It is preferred that, the optical signal input of the optical assembly is used for coupled laser, wherein, the number of laser with it is described
The number of photo-signal channel unit group is consistent, and the scope of the laser emitting wavelength is less than 1/10th of its centre wavelength.
It is preferred that, the laser includes：Vertical cavity surface emitting laser and/or edge-emitting laser, its working method
For reactance modulation system or continuous luminous mode.
It is preferred that, according to grating equation：N Λ sin (θ)=m λ and each laser centre wavelength, select thickness
Meet the substrate of equation demand respectively with screen periods, and the distance differed between different photo-signal channel unit groups is set, make
The same convergent point of substrate surface can be converged at by obtaining the optical signal of various lasers output；
Wherein n is the refractive index of substrate, and Λ is screen periods, and θ is the angle of diffraction light and normal, and λ is lambda1-wavelength,
M is natural number, is determined by the flare angle and incident wavelength of grating.
It is preferred that, after optical signal is by each photo-signal channel unit group, impinge perpendicularly on the first diffraction grating on substrate
Qu Shi, the selection or processing thickness meet the substrate of preset parameter value, and set phase between different photo-signal channel unit groups
The distance of difference, is specifically included：
According to formula Li=2Dtan (θi) calculate and obtain i-th laser and project optical signal and transmit light path in a substrate to reflect
It is mapped to the air line distance of substrate surface；So that the distance between each photo-signal channel unit group is corresponding to be mapped to substrate surface
Air line distance difference absolute value it is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser
Degree.
It is preferred that, the non-reciprocal device includes：Magneto optic isolator or unidirectional couplings element.
Second aspect, present invention also offers a kind of application method of compact multi-wavelength light component, uses such as first party
Compact multi-wavelength light component described in face, also, the compact multi-wavelength light component and the laser for possessing respective wavelength
Coupling is completed with fixing, specifically：
Calculate in the compact multi-wavelength light component, each optical signal is projected relative to from laser, is believed by each light
After number channel unit group and substrate, when converging to the same convergent point of substrate surface, the optical path difference that each optical signal is passed through；
It is prolonging between each laser setting drive signal according to the optical path difference when sending drive signal for each laser
When；Delay between the drive signal is used to offset the optical path difference that each optical signal is passed through so that each optical signal is converged to simultaneously
The same convergent point of substrate surface.
It is preferred that, the light-emitting window side positioned at the compact multi-wavelength light module board is provided with photo-detector, then described
Application method also includes：
According to the delay parameter between the drive signal calculated, each laser is tested respectively；
Each laser is counted respectively since being received drive signal work, when detecting laser signal to photo-detector,
Every time it is whether identical；Wherein, delay parameter is arranged in drive signal；
If the interval duration for the optical signal that each laser of correspondence of statistics is launched is inconsistent, current compact is confirmed
Multi-wavelength light component is substandard products.
The third aspect, present invention also offers a kind of compact multi-wavelength light component, optical assembly includes at least two laser
Device, at least two groups photo-signal channel unit groups and a substrate, the photo-signal channel unit group are set on the substrate；Its
In, one group of photo-signal channel unit group includes lens, non-heterogeneite device and speculum, three along optical signal transmission direction according to
Secondary setting is on the substrate；Laser also includes with the Lens Coupling in photo-signal channel unit group, the optical assembly：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffraction light grid region；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes by each photo-signal channel
The optical signal of unit group, and the optical signal transmitted in substrate is being entered by the first diffraction light grid region diffraction,
After the total reflection of the base plate bottom, the same convergent point of substrate surface is converged at；
Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions；
The optical maser wavelength that each laser is configured according to its own, respectively with layout after photo-signal channel unit group is coupled,
Fix on the substrate；Wherein, the bigger laser of wavelength photo-signal channel unit group coupled thereto is relative to convergent point
Distance is more remote.
It is preferred that, according to grating equation：N Λ sin (θ)=m λ and each laser centre wavelength, select thickness
Meet the substrate of equation demand respectively with screen periods, and the distance differed between different photo-signal channel unit groups is set, make
The same convergent point of substrate surface can be converged at by obtaining the optical signal of various lasers output；
Wherein n is the refractive index of substrate, and Λ is screen periods, and θ is the angle of diffraction light and normal, and λ is lambda1-wavelength,
M is natural number, is determined by the flare angle and incident wavelength of grating.
It is preferred that, after optical signal is by each photo-signal channel unit group, impinge perpendicularly on the first diffraction grating on substrate
Qu Shi, the selection or processing thickness meet the substrate of preset parameter value, and set phase between different photo-signal channel unit groups
The distance of difference, is specifically included：
According to formula Li=2Dtan (θi) calculate and obtain i-th laser and project optical signal and transmit light path in a substrate to reflect
It is mapped to the air line distance of substrate surface；So that the distance between each photo-signal channel unit group is corresponding to be mapped to substrate surface
Air line distance difference absolute value it is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser
Degree.
Fourth aspect, present invention also offers a kind of compact multi-wavelength light component, optical assembly includes at least two groups light letters
Number channel unit group and a substrate, the photo-signal channel unit group are set on the substrate, wherein, one group of photo-signal channel
Unit group includes lens, non-heterogeneite device and speculum, and three receives direction along optical signal, according to speculum, non-inequality
The order of property device and lens, sets gradually on the substrate, the optical assembly also includes：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffraction light grid region；
Substrate surface is provided with the second diffractive grating regions；Wherein, the second diffractive grating regions and the first diffraction light grid region
Positioned at the homonymy of the substrate；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance make it that closing beam laser signal is entering
When being mapped to the second diffraction light grid region of upper surface of base plate, the laser signal for the corresponding different wave length that diffraction goes out can pass through base
After the total reflection of plate bottom, the first diffraction light grid region arrived at below the speculum in each photo-signal channel unit group.
It is preferred that, the light signal output end of each photo-signal channel unit group is used to couple photo-detector in the optical assembly.
It is preferred that, according to grating equation：N Λ sin (θ)=m λ and each laser centre wavelength, select thickness
Meet the substrate of equation demand respectively with screen periods, and the distance differed between different photo-signal channel unit groups is set, make
Corresponding photo-signal channel can be coupled to after second grating region and the first grating region diffraction by obtaining combined beam light signal
In the light-path of unit group；
Wherein n is the refractive index of substrate, and Λ is screen periods, and θ is the angle of diffraction light and normal, and λ is lambda1-wavelength,
M is natural number, is determined by the flare angle and incident wavelength of grating.
It is preferred that, the distance differed between different photo-signal channel unit groups is set so that combined beam light signal can pass through
After second grating region and the first grating region diffraction, in the light-path for being coupled to corresponding photo-signal channel unit group, tool
Body includes：
According to formula Li=2Dtan (θi) calculate and obtain i-th of wavelength channels and transmit light path in a substrate being mapped to base
The air line distance of plate surface；So that the corresponding straight line for being mapped to substrate surface of the distance between each photo-signal channel unit group
The absolute value of range difference is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser
Degree.
It is preferred that, the non-reciprocal device includes：Magneto optic isolator or unidirectional couplings element.
Compared with prior art, the beneficial effect of the embodiment of the present invention is：The present invention proposes a kind of many ripples of compact
Long optical assembly, make use of diffraction grating to correspond to the optical signal of different wave length, produce the principle of different angle of diffraction, and lead to
Cross interval between the rational photo-signal channel unit group designed for conducting different wave length so that different wave length optical signal can
After the reflection of diffraction, base plate bottom of the first diffractive grating regions and the diffraction of the second diffractive grating regions is undergone, light is completed
The clustering process of signal.The mode proposed in the background technology that compares, compactedness is more preferable, due to dexterously changing optical axis, significantly
The utilization rate of substrate space is improved, more elements can be placed in the admissible space of existing photoelectricity integrated chip；
On the other hand, Stability Analysis of Structures proposed by the invention is more preferable, because can directly make diffraction grating on substrate
Make, whole multiplex light path will be completed in substrate, may be such that whole light channel structure is stable.
In addition, the heat endurance of compact multi-wavelength light component proposed by the invention is also more preferable, if semiconductor swashs
The outgoing wavelength with temperature of light device changes, but because the wavelength difference of adjacent semiconductor laser is constant, then the invention is still
Multi-wavelength multiplex can be completed well.
【Brief description of the drawings】
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of compact multi-wavelength light modular construction front view provided in an embodiment of the present invention；
Fig. 2 is facing with light path effect in a kind of compact multi-wavelength light modular construction provided in an embodiment of the present invention
Figure；
Fig. 3 is another compact multi-wavelength light modular construction front view provided in an embodiment of the present invention；
Fig. 4 is facing with light path effect in another compact multi-wavelength light modular construction provided in an embodiment of the present invention
Figure；
Fig. 5 is a kind of compact multi-wavelength light component application method flow chart provided in an embodiment of the present invention；
Fig. 6 is a kind of compact multi-wavelength light component detection method flow diagram provided in an embodiment of the present invention；
Fig. 7 is another compact multi-wavelength light modular construction front view provided in an embodiment of the present invention；
Fig. 8 is that the right side with light path effect is regarded in another compact multi-wavelength light modular construction provided in an embodiment of the present invention
Figure；
Fig. 9 is another compact multi-wavelength light modular construction front view provided in an embodiment of the present invention；
Figure 10 be in another compact multi-wavelength light modular construction provided in an embodiment of the present invention with light path effect just
View；
Figure 11 is another compact multi-wavelength light modular construction front view provided in an embodiment of the present invention；
Figure 12 be in another compact multi-wavelength light modular construction provided in an embodiment of the present invention with light path effect just
View.
【Embodiment】
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the invention, term " interior ", " outer ", " longitudinal direction ", " transverse direction ", " on ", " under ", " top ", " bottom " etc. refer to
The orientation or position relationship shown be based on orientation shown in the drawings or position relationship, be for only for ease of description the present invention rather than
It is required that the present invention must be with specific azimuth configuration and operation, therefore it is not construed as limitation of the present invention.
As long as in addition, technical characteristic involved in each embodiment of invention described below is each other not
Constituting conflict can just be mutually combined.
Embodiment 1:
The embodiment of the present invention 1 provides a kind of compact multi-wavelength light component, as shown in figures 1 and 3, and optical assembly is included extremely
Few two groups of photo-signal channel unit groups and a substrate, the photo-signal channel unit group are set on the substrate, wherein, one group
Photo-signal channel unit group includes lens, non-heterogeneite device and speculum, and three sets gradually along optical signal transmission direction
On the substrate；In embodiments of the present invention, the lens, for receiving the inputs light beam of laser, and are converted it into
Collimated light beam is exported；The non-reciprocal device, speculum is come from for transmiting the collimated light beam signal from lens, and isolating
Beam signal (also referred to as optical signal)；The reflection device, for changing from non-reciprocal device transmitted through the light beam come
The direction of propagation so that the vertical directive substrate of the beam signal.The optical assembly also includes：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffractive grating regions；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes by each photo-signal channel
The optical signal of unit group, and the optical signal transmitted in substrate is being entered by first diffractive grating regions diffraction,
After the total reflection of the base plate bottom, the same convergent point of substrate surface is being converged at；
Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions.
The embodiment of the present invention proposes a kind of compact multi-wavelength light component, make use of diffraction grating to correspond to different ripples
Long optical signal, produces the principle of different angle of diffraction, and pass through optical signal reasonably designed for conducting different wave length
It is spaced between channel unit group so that different wave length optical signal can undergo diffraction, the substrate base of the first diffractive grating regions
After the reflection in portion and the diffraction of the second diffractive grating regions, the clustering process of optical signal is completed.Proposed in the background technology that compares
Mode, compactedness more preferably, due to dexterously changing optical axis, substantially increase the utilization rate of substrate space, can be in existing photoelectricity
More elements are placed in the admissible space of integrated chip；
On the other hand, the Stability Analysis of Structures that the embodiment of the present invention is proposed is more preferable, because can be by diffraction grating directly in base
Made on plate, whole multiplex light path will be completed in substrate, may be such that whole light channel structure is stable.
In addition, the heat endurance for the compact multi-wavelength light component that the embodiment of the present invention is proposed is also more preferable, if half
The outgoing wavelength with temperature of conductor laser changes, but because the wavelength difference of adjacent semiconductor laser is constant, then should
Invention still is able to complete multi-wavelength multiplex well.
In embodiments of the present invention, as the existence form of each component units in photo-signal channel unit group, lens can
To be single, discrete element or microlens array；Non-reciprocal device can be it is discrete, can also be with diffraction
Grating carries out integrated；Diffraction grating both can be discrete component, can also be integrated on substrate.
As shown in figure 1, the number with photo-signal channel unit group provided by the embodiment of the present invention is specially 2 groups of knot
Structure schematic diagram, wherein, the 1st group of photo-signal channel unit group includes lens 101, non-heterogeneite device 102 and speculum 103, and
2nd group of photo-signal channel unit group includes lens 111, non-heterogeneite device 112 and speculum 113；First diffractive grating regions
Shown in Fig. 1 shown in dotted line frame 11, and positioned at the upper surface of substrate 1 and speculum (including speculum 103 and speculum 113)
Lower section；Second diffractive grating regions are that shown in Fig. 1 shown in dotted line frame 12, its band of position is the compact multi-wavelength light component
When in running order, the optical signal that correspondence each group photo-signal channel unit group is passed over is all-trans by the bottom surface of substrate 1
Penetrate the position converged afterwards.As shown in Fig. 2 the compact multi-wavelength light component provided by the embodiment of the present invention is in work
Make the light path effect diagram in the front view under state.
As shown in figure 3, the number with photo-signal channel unit group provided by the embodiment of the present invention is specially 3 groups of knot
Structure schematic diagram, wherein, the 1st group of photo-signal channel unit group includes lens 101, non-heterogeneite device 102 and speculum the 103, the 2nd
Group photo-signal channel unit group includes lens 111, non-heterogeneite device 112 and speculum 113, and the 3rd group of photo-signal channel list
Tuple includes lens 121, non-heterogeneite device 122 and speculum 123；First diffractive grating regions are dotted line frame 11 shown in Fig. 3
It is shown, and below the upper surface of substrate 1 and speculum (including speculum 103, speculum 113 and speculum 123)；The
Two diffractive grating regions are that shown in Fig. 3 shown in dotted line frame 12, its band of position is that the compact multi-wavelength light component is in work
When making state, the optical signal that correspondence each group photo-signal channel unit group is passed over institute after being totally reflected by the bottom surface of substrate 1
The position of convergence.As shown in figure 4, the compact multi-wavelength light component provided by the embodiment of the present invention is in running order
Under front view in light path effect diagram.
The rest may be inferred, and the number of the photo-signal channel unit group specifically can also be for 4 or multiple, no longer go to live in the household of one's in-laws on getting married herein
State.
In implementation process of the embodiment of the present invention, in order to which the compact multi-wavelength light component for ensureing proposed can coordinate respectively
Laser realizes the correspondence effect to be reached in the description of its feature, equally has phase at least two lasers of cooperating
The restriction of characteristic is answered, specifically, the optical signal input of the optical assembly is used for coupled laser, wherein, the number of laser
Consistent with the number of the photo-signal channel unit group, the scope of the laser emitting wavelength is less than its centre wavelength very
One of.Its principle is, when wavelength variation range is less than centre wavelength 1/10th, to be applied such as CWDM, laterally
Distance is linear with incident wavelength, i.e., the spacing of semiconductor laser and outgoing wavelength are in ratio；Wherein, lateral separation refers to
The position that each optical signal incides when in substrate 1 positioned at the first diffractive grating regions is converged to second in substrate 1 with each optical signal
The distance between position of diffractive grating regions.
In embodiments of the present invention, the cooperative laser of compact multi-wavelength light component that can be used for and proposed
Device, including：Vertical cavity surface emitting laser and/or edge-emitting laser, its working method are reactance modulation system or continuous
Illumination mode.
Can in order to further prove the functional characteristic in the compact multi-wavelength light component that the embodiment of the present invention is proposed
It is realisation, next it will be specifically addressed by way of Theoretical Proof.Due to producing the compact multi-wavelength light group
Part or before specific compact multi-wavelength light component dependency structure parameter is selected, it will usually with regard to the light to be used in light path letter
Number centre wavelength, using frequency range and transmission rate etc. assess and confirm, therefore, carrying out the compact multi-wavelength light component
During design, generally number of lasers to be taken and laser model just, it has been verified that following Theoretical Proof be
Carried out on the basis of this.
According to grating equation：N Λ sin (θ)=m λ and each laser centre wavelength, selection (design) thickness with
Screen periods meet the substrate of equation demand respectively, and set the distance differed between different photo-signal channel unit groups so that
The optical signal of various lasers output can converge at the same convergent point of substrate surface；Wherein n is the refractive index of substrate, and Λ is
Screen periods, θ is the angle of diffraction light and normal, and λ is lambda1-wavelength, and m is natural number, flare angle and incidence by grating
Wavelength determines that the corresponding relation between the flare angle and incident wavelength of the m and grating is prior art, is no longer gone to live in the household of one's in-laws on getting married herein
State.When the wire casing section of grating ruling toothing, the light energy of grating is just concentrated in a predetermined direction, i.e., a certain spectrum
In level.From this orientation detection when, the maximum intensity of spectrum, this phenomenon be referred to as glitter (blaze), this grating be referred to as glittering
Grating (a kind of example of diffraction grating i.e. described in the embodiment of the present invention).Wherein, in the balzed grating, being so carved into, rise and spread out
The groove face for penetrating effect is a smooth plane, its angle of surface one with grating, referred to as blaze angle (blaze angle).
During specific design, influence angle of diffraction θ factor includes grating period A, the refractive index n of baseplate material
With lambda1-wavelength λ, still, clear and definite lambda1-wavelength λ is usual in compact multi-wavelength light component in premise above
Determined that at the beginning of design, and the refractive index n of baseplate material variability also very little, typically by adjustment grating period A
To change angle of diffraction θ.The angle of diffraction θ is related to whether each optical signal can complete total reflection in the bottom of substrate.
Except above by design come in addition to adjusting angle of diffraction θ, many ripples of compact that the influence embodiment of the present invention is proposed
Another key factor of long optical assembly is the thickness of substrate and the spacing distance of different photo-signal channel unit groups.Wherein, exist
After angle of diffraction θ is determined, the distance and the thickness of substrate differed between different photo-signal channel unit groups is proportional relation, because
This, effect is totally reflected and on the basis of substrate surface makes diffraction grating meeting base plate bottom, what its thickness can be designed
It is as small as possible, it so can further reduce the spacing distance between photo-signal channel unit group.But, substrate in practical operation
The design of thickness also need to consider a bit, be exactly its parameter value can not it is small to degree cause photo-signal channel unit group between
(interval between photo-signal channel unit group can not be caused not accommodate every the size intrinsic less than its unit itself
The component units of lower photo-signal channel unit group itself).
Next, further illustrating the distance differed between different photo-signal channel unit groups and substrate by theory deduction
Thickness be proportional relation.Specifically, after optical signal is by each photo-signal channel unit group, impinging perpendicularly on first on substrate
During diffractive grating regions, the selection or processing thickness meet the substrate of preset parameter value, and set different photo-signal channel lists
The distance differed between tuple, is specifically included：
According to formula Li=2Dtan (θi) calculate and obtain i-th laser and project optical signal and transmit light path in a substrate to reflect
It is mapped to the air line distance of substrate surface；So that the distance between each photo-signal channel unit group is corresponding to be mapped to substrate surface
Air line distance difference absolute value it is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser
Spend (i.e. the angle of diffraction light and normal).
In embodiments of the present invention, the non-reciprocal device includes but is not limited to：Magneto optic isolator or unidirectional coupling
Close element.
In the embodiment of the present invention and other embodiments of the present invention, first diffractive grating regions and the second diffraction light
Gate region can be generated under identical lithography operations, i.e., keep apart between the region by both not deliberately, such behaviour
Make mode more convenient.But it is optional, the position generation institute of diffraction grating by way of mask, can be just used respectively
The first diffraction grating and the second diffraction grating are stated, other regions are (for example：Portion between first diffraction grating and the second diffraction grating
Point) it is then common base material structure.
In the embodiment of the present invention and other embodiments of the present invention, it is related to the region that optical signal is totally reflected to improve
Reflecting effect, can apply reflecting layer in relevant position.For example：In second diffractive grating regions coating it is complete penetrate layer and/or
The region for being used for reflected light signal in the base plate bottom applies reflecting layer.
The compact multi-wavelength light component that the embodiment of the present invention is proposed is logical comprising four groups of optical signals in CWDM application
Road unit group, it is respectively 1271nm, 1291nm, 1311nm and 1331nm corresponding to four optical maser wavelengths.Wherein, substrate material
For silicon, refractive index is 3.5, in order to save cost of manufacture and improve the degree of integration of whole scheme, can by the first diffraction grating and
Second diffraction grating is produced on upper surface of base plate, and the first diffraction grating is transmission-type balzed grating, and screen periods are 0.92um, is dodged
70 ° of angle of credit.Occur diffraction after aforementioned four wavelength laser the first diffraction grating of incidence, by base lower surface reflex,
Same position is overlapped, and lateral separation is respectively 9.22mm, 9.62mm, 10.05mm and 10.53mm, and the interval of incoming position is successively
For 399um, 433um and 474um.Now the thickness of substrate is 3.6mm, and for semiconductor technology, such a thickness is too
Greatly, this problem can multiple reflections be improved in a substrate by diffraction light：Reflect in a substrate twice, substrate thickness is
1.8mm, reflects three times, substrate thickness is 1.2mm, reflects four times, the thickness that substrate thickness can be reduced to 0.9mm, i.e. substrate can
Flexibly to be selected with reference to concrete technology.
In the application for receiving light (such as embodiment 4), the structure of the second diffraction grating is identical with the first diffraction grating structure
.
In the application of transmitting terminal, the second diffraction grating is reflectivity balzed grating, and screen periods are 0.92um, blaze angle
27.2°。
Embodiment 2:
The embodiment of the present invention additionally provides a kind of application method of compact multi-wavelength light component, what the present embodiment was proposed
Using the compact multi-wavelength light component used described in embodiment 1, also, the compact multi-wavelength light component is with gathering around
The laser for having respective wavelength completes coupling with fixing, as shown in figure 5, methods described includes：
In step 301, calculate in the compact multi-wavelength light component, each optical signal is penetrated relative to from laser
Go out, after each photo-signal channel unit group and substrate, when converging to the same convergent point of substrate surface, each optical signal is passed through
Optical path difference.
In step 302, it is that each laser sets drive according to the optical path difference when sending drive signal for each laser
Delay between dynamic signal；Delay between the drive signal is used to offset the optical path difference that each optical signal is passed through so that each light letter
Number the same convergent point of substrate surface is converged to simultaneously.
The embodiment of the present invention proposes a kind of application method of compact multi-wavelength light component, except possessing in embodiment 1
Outside described many beneficial effects, difference of the embodiment of the present invention on the light path that each optical signal is transmitted in a substrate is considered
Away from will pass through delay pre- interference when optical signal is launched using laser so that from each photo-signal channel unit group
Optical signal can arrive at the convergent point simultaneously, it is ensured that close the transmission quality of laser signal after beam.
The embodiment of the present invention is also carried in addition to there is provided the method using compact multi-wavelength light component described in embodiment 1
A kind of method for detecting whether compact multi-wavelength light component described in embodiment 1 is qualified is supplied, positioned at the compact multi-wavelength
The light-emitting window side of optical assembly substrate is provided with photo-detector, as shown in fig. 6, the application method also includes：
In step 401, according to the delay parameter between the drive signal calculated, each laser is tested respectively.
In specific test process, it is same to send the main body of drive signal and the main body of connection photo-detector to each laser
One, for example：The main body is a main frame or server.It is a conjunction beam because different optical signals is projected after by substrate
Optical signal, therefore, in order to detect optical signal that each laser sent by respective photo-signal channel unit group and
Time-consuming used in being projected after substrate, optimal mode is utilized successively with a collection of drive signal, and corresponding laser is triggered successively
Color development optical signal, it is described time-consuming to calculate one by one.
In step 402, since each laser of statistics detect sharp respectively receiving drive signal work to photo-detector
During optical signal, whether interlude is identical；Wherein, delay parameter is arranged in drive signal.
Why delay parameter is arranged in drive signal, is to consider in practical work process, drive signal is equal
It can be pre-processed according to delay parameter, can just form the drive signal for being available for laser to use, it is therefore, so real to carry out test
Test and be closest to reality.This drive signal pretreatment mode, it is possible to increase the formation efficiency of drive signal, than real-time
Increase time delayed signal efficiency much higher.
In step 403, if the interval duration for the optical signal that each laser of correspondence of statistics is launched is inconsistent, confirm
Current compact multi-wavelength light component is substandard products.
The above-mentioned method of testing that the embodiment of the present invention is proposed, can effectively detect the compact proposed by embodiment 1
Multi-wavelength light component, the defect rate of resulting finished product after production and processing.It ensure that work during its future input industrial application
Make stability.
Embodiment 3:
(laser is not carried after there is provided a kind of compact multi-wavelength light component as described in Example 1 in its optical assembly
Device), the embodiment of the present invention additionally provides a kind of compact multi-wavelength light component, and one kind that wherein embodiment of the present invention is proposed is tight
The type multi-wavelength light component that gathers also carries laser.Compact multi-wavelength light component described in the embodiment that compares 1, due to of the invention real
Apply in example and to introduce laser, the flexibility that compact multi-wavelength light component industry uses is reduced to a certain extent and (is swashed
Light device can not be by voluntarily being selected using producer or user), but reduce because many ripples of compact proposed in embodiment 1
Long optical assembly when being installed with the laser purchased in addition, coupling precision is not up to standard cause finally can not be after normal work
Really.
In embodiments of the present invention, optical assembly includes at least two lasers, at least two groups optical signals as described in Fig. 7 and 8
Channel unit group and a substrate, the photo-signal channel unit group are set on the substrate；Wherein, one group of photo-signal channel list
Tuple includes lens, non-heterogeneite device and speculum, and three sets gradually on the substrate along optical signal transmission direction；
Laser and the Lens Coupling in photo-signal channel unit group, in embodiments of the present invention, the lens, for receiving laser
Inputs light beam, and convert it into collimated light beam output；The non-reciprocal device, for transmiting the collimated light from lens
Beam signal, and isolate the beam signal (also referred to as optical signal) from speculum；The reflection device, for changing from nonreciprocal
Property device transmitted through the direction of propagation of the light beam come so that the vertical directive substrate of the beam signal.The optical assembly also includes：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffractive grating regions；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes by each photo-signal channel
The optical signal of unit group, and the optical signal transmitted in substrate is being entered by first diffractive grating regions diffraction,
After the total reflection of the base plate bottom, the same convergent point of substrate surface is being converged at；
Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions；
The optical maser wavelength that each laser is configured according to its own, respectively with layout after photo-signal channel unit group is coupled,
Fix on the substrate；Wherein, the bigger laser of wavelength photo-signal channel unit group coupled thereto is relative to convergent point
Distance is more remote.
The embodiment of the present invention proposes a kind of compact multi-wavelength light component, make use of diffraction grating to correspond to different ripples
Long optical signal, produces the principle of different angle of diffraction, and pass through optical signal reasonably designed for conducting different wave length
It is spaced between channel unit group so that different wave length optical signal can undergo diffraction, the substrate base of the first diffractive grating regions
After the reflection in portion and the diffraction of the second diffractive grating regions, the clustering process of optical signal is completed.Proposed in the background technology that compares
Mode, compactedness more preferably, due to dexterously changing optical axis, substantially increase the utilization rate of substrate space, can be in existing photoelectricity
More elements are placed in the admissible space of integrated chip；
On the other hand, the Stability Analysis of Structures that the embodiment of the present invention is proposed is more preferable, because can be by diffraction grating directly in base
Made on plate, whole multiplex light path will be completed in substrate, may be such that whole light channel structure is stable.
In addition, the heat endurance for the compact multi-wavelength light component that the embodiment of the present invention is proposed is also more preferable, if half
The outgoing wavelength with temperature of conductor laser changes, but because the wavelength difference of adjacent semiconductor laser is constant, then should
Invention still is able to complete multi-wavelength multiplex well.
Also it is exactly that the embodiment of the present invention compares embodiment 1 with higher integrated level, and industry can be improved to make
The ease of used time.
As shown in fig. 7, the number with photo-signal channel unit group provided by the embodiment of the present invention is specially 2 groups of knot
Structure schematic diagram, wherein, the 1st group of photo-signal channel unit group includes lens 101, non-heterogeneite device 102 and speculum 103, with
The 1st group of photo-signal channel unit group coupling is laser 104, and the 2nd group of photo-signal channel unit group includes lens
111st, non-heterogeneite device 112 and speculum 113, what is coupled with the 2nd group of photo-signal channel unit group is laser 114；
First diffractive grating regions are shown in Fig. 7 shown in dotted line frame 11, and positioned at (including the reflection of the upper surface of substrate 1 and speculum
Mirror 103 and speculum 113) lower section；Second diffractive grating regions are that its band of position is described shown in Fig. 7 shown in dotted line frame 12
When compact multi-wavelength light component is in running order, the optical signal that correspondence each group photo-signal channel unit group is passed over is in warp
The position converged after the bottom surface total reflection for crossing substrate 1.The compact multi-wavelength light component that the embodiment of the present invention is provided
Light path effect diagram in right view under in running order is as shown in Figure 8；It is described tight that the embodiment of the present invention is provided
The light path effect diagram in front view under the type multi-wavelength light component that gathers is in running order can be used for reference shown in Fig. 2, herein
Repeat no more.
As shown in figure 9, the number with photo-signal channel unit group provided by the embodiment of the present invention is specially 4 groups of knot
Structure schematic diagram, wherein, the 1st group of photo-signal channel unit group includes lens 101, non-heterogeneite device 102 and speculum 103, with
The 1st group of photo-signal channel unit group coupling is laser 104；2nd group of photo-signal channel unit group include lens 111,
Non- heterogeneite device 112 and speculum 113, what is coupled with the 2nd group of photo-signal channel unit group is laser 114；3rd group
Photo-signal channel unit group includes lens 121, non-heterogeneite device 122 and speculum 123, with the 3rd group of photo-signal channel
The coupling of unit group is laser 124；4th group of photo-signal channel unit group includes lens 131, non-heterogeneite device 132 and anti-
Mirror 133 is penetrated, what is coupled with the 4th group of photo-signal channel unit group is laser 134；First diffractive grating regions are Fig. 9 institutes
Show shown in dotted line frame 11, and positioned at the upper surface of substrate 1 and speculum (including speculum 103, speculum 113 and speculum
123) lower section；Second diffractive grating regions are that shown in Fig. 9 shown in dotted line frame 12, its band of position is the compact multi-wavelength light
When component is in running order, the optical signal that correspondence each group photo-signal channel unit group is passed over is in the bottom surface by substrate 1
The position converged after total reflection.As shown in Figure 10, the compact multi-wavelength light component provided by the embodiment of the present invention
Light path effect diagram in front view under in running order.
The rest may be inferred, and the number of the photo-signal channel unit group specifically can also be for 5 or multiple, matching
The rest may be inferred for laser, will not be repeated here.
In implementation process of the embodiment of the present invention, in order to which the compact multi-wavelength light component for ensureing proposed can coordinate respectively
Laser realizes the correspondence effect to be reached in the description of its feature, equally has phase at least two lasers of cooperating
The restriction of characteristic is answered, specifically, the optical signal input of the optical assembly is used for coupled laser, wherein, the number of laser
Consistent with the number of the photo-signal channel unit group, the scope of the laser emitting wavelength is less than its centre wavelength very
One of.Its principle is, when wavelength variation range is less than centre wavelength 1/10th, to be applied such as CWDM, laterally
Distance is linear with incident wavelength, i.e., the spacing of semiconductor laser and outgoing wavelength are in ratio；Wherein, lateral separation refers to
The position that each optical signal incides when in substrate 1 positioned at the first diffractive grating regions is converged to second in substrate 1 with each optical signal
The distance between position of diffractive grating regions.
In embodiments of the present invention, the cooperative laser of compact multi-wavelength light component that can be used for and proposed
Device, including：Vertical cavity surface emitting laser and/or edge-emitting laser, its working method are reactance modulation system or continuous
Illumination mode.
Can in order to further prove the functional characteristic in the compact multi-wavelength light component that the embodiment of the present invention is proposed
It is realisation, next it will be specifically addressed by way of Theoretical Proof.Due to producing the compact multi-wavelength light group
Part or before specific compact multi-wavelength light component dependency structure parameter is selected, it will usually with regard to the light to be used in light path letter
Number centre wavelength, using frequency range and transmission rate etc. assess and confirm, therefore, carrying out the compact multi-wavelength light component
During design, generally number of lasers to be taken and laser model just, it has been verified that following Theoretical Proof be
Carried out on the basis of this.
According to grating equation：N Λ sin (θ)=m λ and each laser centre wavelength, selection (design) thickness with
Screen periods meet the substrate of equation demand respectively, and set the distance differed between different photo-signal channel unit groups so that
The optical signal of various lasers output can converge at the same convergent point of substrate surface；Wherein n is the refractive index of substrate, and Λ is
Screen periods, θ is the angle of diffraction light and normal, and λ is lambda1-wavelength, and m is natural number, flare angle and incidence by grating
Wavelength is determined.
During specific design, influence angle of diffraction θ factor includes grating period A, the refractive index n of baseplate material
With lambda1-wavelength λ, still, clear and definite lambda1-wavelength λ is usual in compact multi-wavelength light component in premise above
Determined that at the beginning of design, and the refractive index n of baseplate material variability also very little, typically by adjustment grating period A
To change angle of diffraction θ.The angle of diffraction θ is related to whether each optical signal can complete total reflection in the bottom of substrate.
Except above by design come in addition to adjusting angle of diffraction θ, many ripples of compact that the influence embodiment of the present invention is proposed
Another key factor of long optical assembly is the thickness of substrate and the spacing distance of different photo-signal channel unit groups.Wherein, exist
After angle of diffraction θ is determined, the distance and the thickness of substrate differed between different photo-signal channel unit groups is proportional relation, because
This, effect is totally reflected and on the basis of substrate surface makes diffraction grating meeting base plate bottom, what its thickness can be designed
It is as small as possible, it so can further reduce the spacing distance between photo-signal channel unit group.But, substrate in practical operation
The design of thickness also need to consider a bit, be exactly its parameter value can not it is small to degree cause photo-signal channel unit group between
(interval between photo-signal channel unit group can not be caused not accommodate every the size intrinsic less than its unit itself
The component units of lower photo-signal channel unit group itself).
Next, further illustrating the distance differed between different photo-signal channel unit groups and substrate by theory deduction
Thickness be proportional relation.Specifically, after optical signal is by each photo-signal channel unit group, impinging perpendicularly on first on substrate
During diffractive grating regions, the selection or processing thickness meet the substrate of preset parameter value, and set different photo-signal channel lists
The distance differed between tuple, is specifically included：
According to formula Li=2Dtan (θi) calculate and obtain i-th laser and project optical signal and transmit light path in a substrate to reflect
It is mapped to the air line distance of substrate surface；So that the distance between each photo-signal channel unit group is corresponding to be mapped to substrate surface
Air line distance difference absolute value it is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser
Spend (i.e. the angle of diffraction light and normal).
In embodiments of the present invention, the non-reciprocal device includes but is not limited to：Magneto optic isolator or unidirectional coupling
Close element.
Embodiment 4:
Embodiment 1 and embodiment 3 propose a kind of compact multi-wavelength light component, but corresponding optical assembly is as sharp
Light transmitting terminal is illustrated, and similar technical principle and structure is readily applicable to optical receiving end.Specifically, such as Figure 11
Shown, optical assembly includes at least two groups photo-signal channel unit groups and a substrate, and the photo-signal channel unit group is arranged on institute
State on substrate, wherein, one group of photo-signal channel unit group includes lens, non-heterogeneite device and speculum, and three believes along light
Number receive direction, according to the order of speculum, non-heterogeneite device and lens, set gradually on the substrate, the light group
Part also includes：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffractive grating regions；
Substrate surface is provided with the second diffractive grating regions；Wherein, the second diffractive grating regions and the first diffraction light grid region
Domain is located at the homonymy of the substrate；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance make it that closing beam laser signal is entering
When being mapped to the second diffraction light grid region of upper surface of base plate, the laser signal for the corresponding different wave length that diffraction goes out can pass through base
After the total reflection of plate bottom, the first diffractive grating regions arrived at below the speculum in each photo-signal channel unit group.
The embodiment that compares 1, light path trend takes reverse in being embodiment in principle due to the embodiment of the present invention
Move towards what is completed, therefore, the embodiment of the present invention can obtain the beneficial effect that corresponding optical assembly is resulted in embodiment 1.
The implementation of laser is set up in the embodiment that compares 3 in the compact multi-wavelength light component, the present invention
Embodiment is also provided that the solution comprising photo-detector, as shown in figure 11, each photo-signal channel list in the optical assembly
The light signal output end of tuple is used to couple photo-detector.
In fig. 11, the number with photo-signal channel unit group provided by the embodiment of the present invention is specially 4 groups of knot
Structure schematic diagram, wherein, the 1st group of photo-signal channel unit group includes lens 101, non-heterogeneite device 102 and speculum 103, with
The 1st group of photo-signal channel unit group coupling is photo-detector 105；2nd group of photo-signal channel unit group includes lens
111st, non-heterogeneite device 112 and speculum 113, what is coupled with the 2nd group of photo-signal channel unit group is laser 115；
3rd group of photo-signal channel unit group includes lens 121, non-heterogeneite device 122 and speculum 123, with the 3rd group of optical signal
The coupling of channel unit group is laser 125；4th group of photo-signal channel unit group includes lens 131, non-heterogeneite device 132
With speculum 133, what is coupled with the 4th group of photo-signal channel unit group is laser 135；First diffractive grating regions are figure
Shown in dotted line frame 11 shown in 11, and positioned at the upper surface of substrate 1 and speculum (including speculum 103, speculum 113 and anti-
Penetrate mirror 123) lower section；Second diffractive grating regions are that shown in Figure 11 shown in dotted line frame 12, its band of position is that the compact is more
When wavelength optical assembly is in running order, the optical signal that correspondence each group photo-signal channel unit group is passed over is passing through substrate 1
Bottom surface total reflection after the position converged.As shown in figure 12, the compact multi-wavelength provided by the embodiment of the present invention
Light path effect diagram in front view under optical assembly is in running order.
It is related to substrate thickness, substrate index, the interval of photo-signal channel unit group, diffraction grating in the embodiment of the present invention
Cycle set etc. may be referred to the elaboration of design principle described in embodiment 1 or embodiment 3, will not be repeated here.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of embodiment is to lead to
Cross program to instruct the hardware of correlation to complete, the program can be stored in a computer-readable recording medium, storage medium
It can include：Read-only storage (ROM, Read Only Memory), random access memory (RAM, Random Access
Memory), disk or CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (16)
1. a kind of compact multi-wavelength light component, it is characterised in that optical assembly include at least two groups photo-signal channel unit groups and
One substrate, the photo-signal channel unit group is set on the substrate, wherein, one group of photo-signal channel unit group includes saturating
Mirror, non-heterogeneite device and speculum, three set gradually on the substrate along optical signal transmission direction, the optical assembly
Also include：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffraction light grid region；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes by each photo-signal channel unit
The optical signal of group, and the optical signal transmitted in substrate is being entered by the first diffraction light grid region diffraction, passing through
After the total reflection of the base plate bottom, the same convergent point of substrate surface is converged at；
Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions.
2. compact multi-wavelength light component according to claim 1, it is characterised in that the optical signal input of the optical assembly
Hold for coupled laser, wherein, the number of laser is consistent with the number of the photo-signal channel unit group, the laser
The scope of outgoing wavelength is less than 1/10th of its centre wavelength.
3. compact multi-wavelength light component according to claim 2, it is characterised in that the laser includes：
Vertical cavity surface emitting laser and/or edge-emitting laser, its working method are reactance modulation system or continuous luminous
Mode.
4. according to any described compact multi-wavelength light components of claim 1-3, it is characterised in that according to grating equation：n·
Λ sin (θ)=m λ and each laser centre wavelength, selection thickness and screen periods meet the base of equation demand respectively
Plate, and the distance differed between different photo-signal channel unit groups is set so that the optical signal of various lasers output can converge
Gather the same convergent point in substrate surface；
Wherein n is the refractive index of substrate, and Λ is screen periods, and θ is the angle of diffraction light and normal, and λ is lambda1-wavelength, and m is
Natural number.
5. compact multi-wavelength light component according to claim 4, it is characterised in that logical by each optical signal in optical signal
After road unit group, when impinging perpendicularly on the first diffraction light grid region on substrate, the selection or processing thickness meet preset parameter value
Substrate, and the distance differed between different photo-signal channel unit groups is set, specifically included：
According to formula Li=2Dtan (θi) calculate and obtain i-th laser and project optical signal and transmit light path in a substrate to be mapped to
The air line distance of substrate surface；So that the distance between each photo-signal channel unit group is corresponding to be mapped to the straight of substrate surface
The absolute value of line-spacing deviation is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser.
6. compact multi-wavelength light component according to claim 1, it is characterised in that the non-reciprocal device includes：
Magneto optic isolator or unidirectional couplings element.
7. a kind of application method of compact multi-wavelength light component, it is characterised in that using as described in claim 1-6 is any
Compact multi-wavelength light component, also, the compact multi-wavelength light component with possess respective wavelength laser complete couple
With fixation, specifically：
Calculate in the compact multi-wavelength light component, each optical signal is projected relative to from laser, it is logical by each optical signal
After road unit group and substrate, when converging to the same convergent point of substrate surface, the optical path difference that each optical signal is passed through；
It is the delay between each laser setting drive signal according to the optical path difference when sending drive signal for each laser；
Delay between the drive signal is used to offset the optical path difference that each optical signal is passed through so that each optical signal converges to substrate simultaneously
The same convergent point on surface.
8. the application method of compact multi-wavelength light component according to claim 7, it is characterised in that positioned at described compact
The light-emitting window side of type multi-wavelength light module board is provided with photo-detector, then the application method also includes：
According to the delay parameter between the drive signal calculated, each laser is tested respectively；
Each laser is counted respectively since being received drive signal work, when detecting laser signal to photo-detector, interval
Whether the time is identical；Wherein, delay parameter is arranged in drive signal；
If the interval duration for the optical signal that each laser of correspondence of statistics is launched is inconsistent, many ripples of current compact are confirmed
Long optical assembly is substandard products.
9. a kind of compact multi-wavelength light component, it is characterised in that optical assembly includes at least two lasers, at least two groups light letters
Number channel unit group and a substrate, the photo-signal channel unit group are set on the substrate；Wherein, one group of photo-signal channel
Unit group includes lens, non-heterogeneite device and speculum, and three is successively set on the substrate along optical signal transmission direction
On；Laser also includes with the Lens Coupling in photo-signal channel unit group, the optical assembly：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffraction light grid region；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance causes by each photo-signal channel unit
The optical signal of group, and the optical signal transmitted in substrate is being entered by the first diffraction light grid region diffraction, passing through
After the total reflection of the base plate bottom, the same convergent point of substrate surface is converged at；
Wherein, each optical signal substrate surface to be converged is provided with the second diffractive grating regions；
The optical maser wavelength that each laser is configured according to its own, it is fixed respectively with layout after photo-signal channel unit group is coupled
On the substrate；Wherein, the bigger laser of wavelength photo-signal channel unit group coupled thereto is relative to convergent point distance
It is more remote.
10. compact multi-wavelength light component according to claim 9, it is characterised in that according to grating equation：n·Λ·
Sin (θ)=m λ and each laser centre wavelength, selection thickness and screen periods meet the substrate of equation demand respectively, and
The distance differed between different photo-signal channel unit groups is set so that the optical signal of various lasers output can converge at base
The same convergent point of plate surface；
Wherein n is the refractive index of substrate, and Λ is screen periods, and θ is the angle of diffraction light and normal, and λ is lambda1-wavelength, and m is
Natural number.
11. compact multi-wavelength light component according to claim 10, it is characterised in that pass through each optical signal in optical signal
After channel unit group, when impinging perpendicularly on the first diffraction light grid region on substrate, the selection or processing thickness meet parameter preset
The substrate of value, and the distance differed between different photo-signal channel unit groups is set, specifically include：
According to formula Li=2Dtan (θi) calculate and obtain i-th laser and project optical signal and transmit light path in a substrate to be mapped to
The air line distance of substrate surface；So that the distance between each photo-signal channel unit group is corresponding to be mapped to the straight of substrate surface
The absolute value of line-spacing deviation is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser.
12. a kind of compact multi-wavelength light component, it is characterised in that optical assembly include at least two groups photo-signal channel unit groups and
One substrate, the photo-signal channel unit group is set on the substrate, wherein, one group of photo-signal channel unit group includes saturating
Mirror, non-heterogeneite device and speculum, three receive direction along optical signal, according to speculum, non-heterogeneite device and lens
Order, set gradually on the substrate, the optical assembly also includes：
It is located at the lower section for the reflecting surface for being fixed with the speculum on the substrate, is provided with the first diffraction light grid region；
Substrate surface is provided with the second diffractive grating regions；Wherein, the second diffractive grating regions and the first diffraction grating area are located at
The homonymy of the substrate；
Pre-determined distance is differed between different photo-signal channel unit groups, the pre-determined distance make it that closing beam laser signal is inciding
During the second diffraction light grid region of upper surface of base plate, the laser signal for the corresponding different wave length that diffraction goes out can pass through substrate base
After the total reflection in portion, the first diffraction light grid region arrived at below the speculum in each photo-signal channel unit group.
13. compact multi-wavelength light component according to claim 12, it is characterised in that each optical signal in the optical assembly
The light signal output end of channel unit group is used to couple photo-detector.
14. according to any described compact multi-wavelength light component of claim 12 or 13, it is characterised in that according to grating side
Journey：N Λ sin (θ)=m λ and each laser centre wavelength, selection thickness and screen periods meet equation demand respectively
Substrate, and the distance differed between different photo-signal channel unit groups is set so that combined beam light signal can be by described the
After two grating regions and the first grating region diffraction, in the light-path for being coupled to corresponding photo-signal channel unit group；
Wherein n is the refractive index of substrate, and Λ is screen periods, and θ is the angle of diffraction light and normal, and λ is lambda1-wavelength, and m is
Natural number.
15. compact multi-wavelength light component according to claim 14, it is characterised in that the different optical signals of the setting lead to
The distance differed between road unit group so that combined beam light signal can spread out by second grating region and the first grating region
After penetrating, in the light-path for being coupled to corresponding photo-signal channel unit group, specifically include：
According to formula Li=2Dtan (θi) calculate and obtain i-th of wavelength channels and transmit light path in a substrate being mapped to substrate table
The air line distance in face；So that the corresponding air line distance for being mapped to substrate surface of the distance between each photo-signal channel unit group
The absolute value of difference is identical；
Wherein, θiThe angle that optical signal is diffracted into from i-th group of photo-signal channel unit group in substrate is projected for i-th of laser.
16. compact multi-wavelength light component according to claim 12, it is characterised in that the non-reciprocal device bag
Include：Magneto optic isolator or unidirectional couplings element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710385173.3A CN107121782A (en) | 2017-05-26 | 2017-05-26 | A kind of compact multi-wavelength light component and its application method |
| PCT/CN2017/118568 WO2018214498A1 (en) | 2017-05-26 | 2017-12-26 | Compact multi-wavelength optical component and usage method therefor |
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| WO2018214498A1 (en) | 2018-11-29 |
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