CN109061810A - A kind of laser assembly and corresponding optical module - Google Patents
A kind of laser assembly and corresponding optical module Download PDFInfo
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- CN109061810A CN109061810A CN201810877330.7A CN201810877330A CN109061810A CN 109061810 A CN109061810 A CN 109061810A CN 201810877330 A CN201810877330 A CN 201810877330A CN 109061810 A CN109061810 A CN 109061810A
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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
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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
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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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
- G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a kind of laser assembly and corresponding optical modules, the laser assembly includes that laser assembly includes multiple optic path channels, laser assembly includes: multiple lasers, multiple collimation lenses and prism, wherein prism includes multiple deviation faces；Each optic path channel includes a laser, a collimation lens and a deviation face；In any optic path channel, the laser that collimation lens is used to issue laser carries out collimation processing and forms collimation laser；Prism is for reflecting the collimation laser for being incident to corresponding deviation face, so that the collimation laser after reflecting is parallel to the center line outgoing of prism.The laser that laser assembly of the invention is emitted various lasers guarantees outgoing light power equalization by mutually independent optic path channel transfer；Simultaneously there is the prism in multiple deviation faces can be compatible with multiple optic path channels, reduces the package dimension of laser assembly.
Description
Technical field
The invention belongs to technical field of photo communication, more particularly, to a kind of laser assembly and corresponding optical module.
Background technique
In optical communication system, as the transmission capacity of optical communication system is increasing, to the performance requirement of optical module
It is higher and higher.For example, the requirement to optical module rate is higher and higher, the requirement to the transmission range of optical module is also increasingly longer.
Realize that light is converted to electricity and electricity to the signal of light usually using optical module in optical communication field, optical signal is usually by laser
It generates, optical module converts optical signals to electric signal to transmit the function that data realize communication.
The performance for the laser that laser is issued directly influences the performance indicators such as the transmission range of optical module.Currently, root
According to the difference of modulation system, there are mainly two types of lasers: directly modulation laser (Directl Y Modulated Laser, letter
Claim DML) and externally modulated laser (External Modulated Laser, abbreviation EML).Wherein, DML laser implements
Relatively simple, cost is relatively low, but dispersion limit is shorter.And EML laser ratio DML laser can obtain biggish dispersion tolerance
Value, but implement more complex, cost is relatively also higher.
In order to improve the rate and transmission range of optical module, mostly use multichannel EML laser assembly along with one greatly
The mode of a packaged semiconductor amplifier (Semiconductor Optical Amplifier, write a Chinese character in simplified form SOA) component carries out
Form optical module.Multichannel EML laser assembly can pass through laser, collimation lens and a multilayer dielectric film cut-off filtration
Piece assembling device is constituted.Laser is directional light after collimation lens, is incident on multilayer dielectric film cut-off filtration piece combiner
In part, multilayer dielectric film cut-off filtration piece assembling device and the placement in a certain angle of collimation lens optical axis, the assembling device are leaned on
Nearly lens are stained with filter plate on one side, and the film for increasing reflectivity is coated at the corresponding multiple optical paths of another side, only reserve one and lead to
There is no reflectance coating at road, for the outgoing optical window of all optical paths.
The multichannel EML laser assembly that inventor's discovery is formed in the manner previously described needs to be situated between in multilayer due to multichannel light
Roundtrip in plasma membrane cut-off filtration piece assembling device, the optical power for being easy to happen multiple-channel output light is unbalanced, forms larger insert
Damage, the lower problem of yield rate.Simultaneously as cut-off filtration piece assembling device needs placement in a certain angle, EML laser is caused
The volume of component is larger, lower to the utilization rate in space.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of laser assembly and accordingly
Optical module, its object is to the laser for being emitted various lasers by mutually independent optic path channel transfer, each
The optical path in optic path channel is almost the same, guarantees outgoing light power equalization；Have the prism in multiple deviation faces can be simultaneous simultaneously
Hold multiple optic path channels, reduce the package dimension of laser assembly, thus solves multiple-channel output light in the prior art
Optical power it is unbalanced, the technical issues of device volume larger problem.
To achieve the above object, first aspect according to the invention provides a kind of laser assembly, the laser
Component includes multiple optic path channels, and the laser assembly includes: multiple lasers 1, multiple collimation lenses 2 and prism
3, wherein the prism 3 includes multiple deviation faces 31；
Each optic path channel includes described in 1, one, the laser collimation lens 2 and one
Deviation face 31；In any optic path channel, the collimation lens 2 is used for the laser issued to the laser 1
It carries out collimation processing and forms collimation laser；The prism 3 is used to reflect the collimation laser for being incident to corresponding deviation face 31,
So that the center line 6 that the collimation laser after reflecting is parallel to the prism 3 is emitted.
Preferably, the prism 3 is in symmetrical structure relative to its center line 6；The laser 1, the collimation lens 2 with
And the number in the deviation face 31 is even number, the number phase of the laser 1, the collimation lens 2 and the deviation face 31
Deng；
Wherein the first side of the center line 6 of the prism 3 is arranged in the laser 1 of half number, the other half number swashs
Second side of the center line 6 of the prism 3 is arranged in light device 1；
Wherein the first side of the center line 6 of the prism 3 is arranged in the collimation lens 2 of half number, the other half number
Second side of the center line 6 of the prism 3 is arranged in collimation lens 2；
Wherein the deviation face 31 of half number is arranged in the first side of the center line 6 of the prism 3, the other half number it is inclined
Second side of the center line 6 of the prism 3 is arranged in folding face 31.
Preferably, the deviation face 31 far from the center line 6 is less than in described relative to the angle of the center line 6
Angle of the deviation face 31 of heart line 6 relative to the center line 6.
Preferably, each deviation face 31 is 5 °~85 ° relative to the angular range of the center line 6.
Preferably, the prism 3 relative to its center line 6 be in symmetrical structure, the prism 3 include the first deviation face 311,
Second deviation face 312, third deviation face 313 and the 4th deviation face 314；First deviation face 311 and second deviation
Face 312 is distributed in the first side of the center line 6, and third deviation face 313 and the 4th deviation face 314 are distributed in the center
Second side of line 6；
First deviation face 311 is 71.22 ° ± 1 ° relative to the angle of the center line 6, second deviation face
312 relative to the angle of the center line 6 be 83.16 ° ± 1 °, folder of the third deviation face 313 relative to the center line 6
Angle is 83.16 ° ± 1 °, and the 4th deviation face 314 is 71.22 ° ± 1 ° relative to the angle of the center line 6；Or
First deviation face 311 is 60.3 ° ± 1 ° relative to the angle of the center line 6, second deviation face 312
Angle relative to the center line 6 is 77.45 ° ± 1 °, angle of the third deviation face 313 relative to the center line 6
It is 77.45 ° ± 1 °, the 4th deviation face 314 is 60.3 ° ± 1 ° relative to the angle of the center line 6.
Preferably, in any optic path channel, the width in the deviation face 31 is not less than the collimation laser
Diameter so that the collimation laser will not be projected on adjacent deviation face 31.
Preferably, the prism 3 is provided with multiple filter plates 7 away from the side in the deviation face 31, the filter plate 7
Number is equal with the number in the deviation face 31.
Preferably, anti-reflection film is additionally provided on each deviation face 31.
Preferably, the laser assembly further includes plus lens 4；
Straight line where the optical axis of the plus lens 4 is overlapped with the straight line where the center line 6；
The plus lens 4 is used to converge the collimation laser being emitted from the prism 3.
Second aspect according to the invention, provides a kind of optical module, and the optical module includes swashing described in first aspect
Light device assembly and optical fiber；The optical fiber is used to receive the laser that the plus lens 4 of the laser assembly is emitted.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have following beneficial to effect
Fruit: the laser that the present invention is emitted various lasers passes through mutually independent optic path channel transfer, each optic path
The optical path in channel is almost the same, guarantees outgoing light power equalization, reduces optical path loss.There is the prism in multiple deviation faces simultaneously
It can be compatible with multiple optic path channels, put down center line of multiple collimation lasers after deviation with prism with correspondence
Row reduces the distance between adjacent beams, to reduce the package dimension of laser assembly.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of laser assembly provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the section structure of the laser assembly in Fig. 1；
Fig. 3 is the structural schematic diagram of another laser assembly provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
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.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
The present invention provides a kind of laser assembly, which is applied to technical field of photo communication, the laser group
Part includes multiple optic path channels, the laser of the corresponding transmission respective wavelength in each optic path channel, and each optic path is logical
Road is mutually indepedent, and the interference between adjacent optic path channel is smaller.Meanwhile the optical path basic one in each optic path channel
It causes, guarantees outgoing light power equalization, reduce optical path loss.On the other hand, prism of the invention has multiple deviation faces, can be with
Compatible multiple optic path channels, with it is corresponding by multiple collimation lasers after deviation with the centerline parallel of prism, and it is logical
Crossing adjustment laser and the position of collimation lens, corresponding deviation face can will be through superrefraction relative to the angle of prism centers line
Collimation laser reduces the distance between adjacent beams, to reduce laser to the angle deviation of the center line close to prism
The package dimension of component.Specific explanations illustrate the structure of laser assembly of the invention below.
Also referring to Fig. 1 and Fig. 2, the present embodiment provides a kind of laser assembly, which includes multiple light
Road transmission channel, each optic path channel is for handling and transmitting the laser that corresponding laser 1 is issued.
Specifically, laser assembly includes: multiple lasers 1, multiple collimation lenses 2, prism 3 and plus lens 4, more
A laser 1, multiple collimation lenses 2, prism 3 and plus lens 4 are correspondingly arranged on the substrate 5, wherein substrate 5 can be with
For aluminium nitride substrate, or the substrate of other materials, here, being not specifically limited.In the present embodiment, prism 3 includes
Multiple deviation faces 31, the number of laser 1, collimation lens 2 and deviation face 31 is equal under normal conditions, and each optic path is logical
Road includes 1, collimation lens 2 of a laser and a deviation face 31；And the quantity of corresponding laser 1 is not then according to
In same module depending on light path design demand, particular determination is not done herein.Wherein, in any optic path channel, due to swashing
The laser that light device 1 emits is diverging light, and the laser for the diverging that collimation lens 2 is used to issue laser 1 carries out collimation processing
Form collimation laser；Prism 3 is for reflecting the collimation laser for being incident to corresponding deviation face 31, so that after reflecting
The center line 6 that collimation laser is parallel to prism 3 is emitted.The laser in each optic path channel is parallel incident after the outgoing of prism 3
To plus lens 4, plus lens 4 converges to the laser in all optic path channels on the focus F of plus lens 4.
In a practical situation, it is also possible to the case where quantity for laser 1 occur is less than 3 deviation face 31 of prism, specifically can be with
It is because 3 deviation face 31 of prism is designed to as the module comprising unified 31 quantity of deviation face, and swashs accordingly in practical application
1 quantity of light device is less than 31 quantity of deviation face, can also equally be combined into similar structure as shown in Figure 1, such as: it will be in Fig. 1
Prism 3 is suitable for the light channel structure of 4 lasers as shown in Figure 3, equally possible.
Specifically, the center of the optical axis of laser 1, the optical axis of collimation lens 2, the optical axis of plus lens 4 and prism 3
Line 6 is parallel to each other.In a preferred embodiment, where the center line 6 of the straight line where the optical axis of plus lens 4 and prism 3
Straight line is overlapped, so that the two sides of laser 1 and the corresponding center line 6 for being distributed in prism 3 of collimation lens 2, form corresponding optical path
Transmission channel.
In specific application scenarios, laser assembly is EML laser assembly, for example, laser 1 can be electric absorption
The type of externally modulated laser or lithium niobate laser, laser 1 is selected according to actual conditions, does not do specific limit herein
It is fixed.Wherein, laser 1 is used to emit the laser of specific wavelength, and the wavelength of laser can be 850nm, 1310nm or 1550nm etc.,
It can be selected according to actual conditions.
In the present embodiment, prism 3 is in symmetrical structure, laser 1, collimation lens 2 and deviation relative to its center line 6
The number in face 31 is even number；Wherein the first side of the center line 6 of prism 3, the other half number is arranged in the laser 1 of half number
Laser 1 be arranged in prism 3 center line 6 second side；Wherein the collimation lens 2 of half number is arranged in prism 3
Second side of the center line 6 of prism 3 is arranged in first side of heart line 6, the collimation lens 2 of the other half number；Wherein half number
Deviation face 31 be arranged in prism 3 center line 6 the first side, the center of prism 3 is arranged in the deviation face 31 of the other half number
Second side of line 6.It is to be understood that the center line 6 of prism 3 is arranged in the optic path channel of the half number of laser assembly
The first side, second side of the center line 6 of prism 3 is arranged in the optic path channel of the other half number, by this way can be with
So that the laser that each optic path channel is transmitted is drawn close to the center line 6 of prism 3, to reduce the size of laser assembly.
In specific application scenarios, prism 3 includes n deviation face 31, wherein n is even number.Between adjacent deviation face 31
It is connected by a transition face 32, wherein each transition face 32 is parallel with the center line 6 of prism 3, each deviation face 31 and each mistake
It crosses face 32 and forms zigzag.Assuming that 311~n-th deviation face 31 of the first deviation face and the angle of the center line 6 of prism 3 are θ1、
θ2、θ3、θ4……θn, since prism 3 is in symmetrical structure, then θ relative to its center line 61=θn、θ2=θn-1, and so on θi=
θn+1-i, wherein θiAngle for i-th of deviation face 31 relative to the middle line of prism 3.
Wherein, each deviation face 31 is 5 °~85 ° relative to the angular range of the center line 6 of prism 3, each deviation face 31
The specific angle of center line 6 relative to prism 3 is designed according to actual conditions.In practical application scene, adjustable laser
It is saturating by collimation to change the diverging light that laser 1 issues for the position of device 1 and collimation lens 2 relative to the corresponding deviation face 31 of prism 3
The angle for the collimation laser being emitted after mirror 2, collimation laser reflect behind the corresponding deviation face 31 of prism 3, so that occurring
The outgoing of center line 6 that collimation laser after refraction is parallel to prism 3 converges in focus using plus lens 4.
In practical application scene, adjust laser 1 goes out position of the luminous point relative to the optical axis of collimation lens 2, to change
Become incident angle of the collimation laser being emitted from collimation lens 2 relative to deviation face 31, so that collimation laser is all projected to phase
On the deviation face 31 answered, while the center line 6 for making collimation laser be parallel to prism 3 after deviation face 31 reflects is emitted.
In order to enable the center line 6 of laser to prism 3 that each optic path channel is transmitted is close, far from prism 3
The deviation face 31 of center line 6 is less than 31 phase of deviation face of the center line 6 close to prism 3 relative to the angle of the center line 6 of prism 3
For the angle of the center line 6 of prism 3, so that the corresponding collimation laser of collimation lens 2 and corresponding deviation face 31 far from prism 3
Intersection point drawn close to the center line 6 of prism 3 so that by prism 3 refraction after light drawn close to the center line 6 of prism 3,
So that the size of plus lens 4 is smaller.By existing micromanipulative technique, interval be can achieve between adjacent directional light
0.1mm can effectively reduce the size of plus lens 4.
In order to guarantee that the laser of adjacent optical path transmission channel will not interfere with each other, in a preferred embodiment, in any light
In the transmission channel of road, the width L in deviation face 31 is not less than the diameter D of collimation laser so that collimation laser will not be projected to it is adjacent
Deviation face 31.Further, prism 3 is provided with multiple filter plates 7 away from the side in deviation face 31.Wherein, filter plate 7 can be with
To end filter plate 7, which is that can filter whole long waves or shortwave from complex light and only retain required wave band model
The optical filter of the laser enclosed.The number of filter plate 7 is equal with the number in deviation face 31；The position that filter plate 7 is arranged with it is corresponding inclined
Folding face 31 is overlapped in prism 3 perpendicular to the projection of the one side of center line 6, the filter plate 7 and the laser in each optic path channel
The wavelength for the laser that device 1 is issued is to correspondence, so that the laser in the optic path channel can be emitted from prism 3, and other waves
Long laser can not pass through filter plate 7.
In order to reduce laser in the reflection in deviation face 31, more laser is reflected through deviation face 31,
To improve the utilization rate of laser.In the present embodiment, anti-reflection film is additionally provided on each deviation face 31 of prism 3.
In the practical coupling operation of laser assembly, first anti-reflection film will be plated on the deviation face 31 of prism 3, then each
31 corresponding position of deviation face is stained with the filter plate 7 of corresponding 1 wavelength of laser.Then, by laser 1, prism 3 and plus lens 4
Passive bonding can be carried out by the limit in shell, finally carries out the active coupling bonding of collimation lens 2.Adjust collimation lens 2
Position make the light of laser 1 that can accurately converge in plus lens 4 after prism 3 and plus lens 4 focus F at,
The progress of collimation lens 2 dispensing, solidification, the coupling in the optic path channel for completing single channel are adjusted again.Similarly, to others
The coupling in optic path channel, which is adjusted, also carries out identical step adjusting, can be accurate with the smallest loss per laser all the way
The focus F of plus lens 4 is converged to, so that the optical path in each optic path channel is almost the same, guarantees outgoing light power equalization,
Optical path loss is reduced, while reducing the size of laser assembly.
Below by taking prism 3 includes four deviation faces as an example, the structure of laser assembly is illustrated.
Refering to Fig. 3, prism 3 includes that the first deviation face 311, the second deviation face 312, third deviation face 313 and the 4th are inclined
Folding face 314, the first deviation face 311 and the second deviation face 312 are distributed in the first side of the center line 6 of prism 3, third deviation face
313 and the 4th deviation face 314 be distributed in prism 3 center line 6 second side.
The number of laser is four, respectively first laser device 11, second laser 12, third laser 13 and the
Four lasers 14, first laser device 11 and second laser 12 are distributed in the first side of the center line 6 of prism 3, third laser
13 and the 4th laser 14 be distributed in prism 3 center line 6 second side.The number of collimation lens be four, respectively first
Collimation lens 21, the second collimation lens 22, third collimation lens 23 and the 4th collimation lens 24.First collimation lens 21 and
Two collimation lenses 22 are distributed in the first side of the center line 6 of prism 3, and third collimation lens 23 and the 4th collimation lens 24 are distributed in
Second side of the center line 6 of prism 3.
Wherein, it is logical to form first via optic path for first laser device 11, the first collimation lens 21 and the first deviation face 311
Road；Second laser 12, the second collimation lens 22 and the second deviation face 312 form the second tunnel optic path channel；Third swashs
Light device 13, third collimation lens 23 and third deviation face 313 form third road optic path channel；4th laser 14,
Four collimation lenses 24 and the 4th deviation face 314 form the 4th tunnel optic path channel.
Side of the prism 3 far from collimation lens, straight line and rib where the optical axis of plus lens 4 is arranged in plus lens 4
Straight line where the center line 6 of mirror 3 is overlapped.Since the optic path channel of laser assembly is the optical axis (rib with plus lens 4
The center line 6 of mirror 3) it is symmetrical structure, therefore two-way transmission channel (first via, second of 6 top of center line is described in detail here
Road transmission channel) coupling condition, the coupling of the two-way transmission channel (third road, the 4th tunnel transmission channel) of the lower section of center line 6
Situation can accordingly be learnt according to the two-way transmission channel of 6 top of center line.
In one of them application scenarios, the length, width and height of laser are having a size of 1.5mm × 0.9mm × 0.6mm, laser
Light-emitting surface in endface.Wherein, prism 3 selects K9 glass, and the refractive index of prism 3 is 1.5.Collimation lens is silicon lens, quasi-
The thickness of straight lens is 0.5mm, the one side of collimation lens against laser be radius of curvature be 0.5, circular cone coefficient be 2.2 it is ellipse
Round surface, another side are plane.Plus lens 4 select K9 glass, the front and back curvature radius of plus lens 4 be respectively 5mm ,-
5mm。
In first via optic path channel, the luminous point of first laser device 11 is in the Y direction away from the distance d of center line 611=
1.35mm.Distance of first collimation lens 21 in the X direction away from 11 luminous point of first laser device is d12=1.17mm, the first collimation
The optical axis of lens 21 is in the Y direction away from the distance d of center line 613=1.12mm.The rear plane of first collimation lens 21 is to prism 3
The first deviation face 311 vertex A distance d14The distance of=1mm, vertex A to the center line 6 in the first deviation face 311 is
The angle theta 1 of 1.17mm, the first deviation face 311 and optical axis is 71.22 °.
In the second tunnel optic path channel, the luminous point of second laser 12 is in the Y direction away from the distance d of center line 621=
0.45mm.Distance of second collimation lens 22 in the X direction away from 12 luminous point of second laser is also d12=1.17mm, second is quasi-
The optical axis of straight lens 22 is in the Y direction away from the distance d of center line 623=0.36mm.The rear plane of second collimation lens 22 is to prism
The distance of the vertex B in 3 the second deviation face 312 is also d14The distance of=1mm, the vertex B in the second deviation face 312 to center line 6
It is 0.55mm, the angle theta 2 of the second deviation face 312 and optical axis is 83.16 °.
In this way, what first via light and the second tunnel optic path channel that first via optic path channel is transmitted were transmitted
Second road light exports the directional light parallel with optical axis after prism 3.Rear plane of 4 first surface of plus lens to prism 3
Distance d15=1mm, plus lens 4 with a thickness of 1mm, the radius of curvature of first surface and the second curved surface is 5mm, -5mm.Convergence
The aperture of lens 4 is 2.3mm, and multi-path parallel light converges at the F of the distance 4.8mm of the second curved surface away from plus lens 4.
Correspondingly, the third laser 13, third collimation lens 23 in third road optic path channel and third deviation face
313 position is designed according to the second tunnel optic path channel, the angle theta 3 and second in third deviation face 31 and center line 6
Deviation face 312 is equal with the angle theta 2 of center line 6, i.e. the angle theta in third deviation face 31 and center line 63It is 83.16 °.4th
4th laser 14, the 4th collimation lens 24 and the position in the 4th deviation face 314 in road optic path channel are according to the first via
The design of optic path channel, i.e., the angle theta in the 4th deviation face 31 and center line 64With the first deviation face 311 and center line
6 angle theta1It is equal, i.e., the angle theta in the 4th deviation face 31 and center line 64It is 71.22 °.
When the size of laser and laser change relative to the position of plus lens, each deviation face relative to
The angle of center line 6 can also change accordingly.In another specific application scenarios, the length, width and height of laser having a size of
1.5mm × 1.2mm × 0.6mm, the light-emitting surface of laser is in endface.Collimation lens is silicon lens, and the thickness of collimation lens is
0.5mm, the one side of collimation lens 2 against laser 1 is the oval calotte that radius of curvature is 0.5, circular cone coefficient is 2.2, another
Face is plane.Prism 3 selects K9 glass, and corresponding refractive index is 1.5.Plus lens 4 selects K9 glass, the front and back of plus lens 4
Curvature radius is respectively 5mm, -5mm.
In the first optic path channel, the luminous point of first laser device 11 is in the Y direction away from the distance d11=of center line 6
1.8mm.Distance of first collimation lens 21 in the X direction away from 11 luminous point of first laser device is d12=1.17mm, the first collimation
The optical axis of lens 21 is in the Y direction away from the distance d of center line 613=1.36mm.The rear plane of first collimation lens 21 is to prism 3
The first deviation face 311 distance be d14=1mm, the distance of the first deviation face 311 vertex A to center line 6 are 1.16mm, first
The angle theta in deviation face 311 and optical axis1It is 60.3 °.
In the second tunnel optic path channel, the luminous point of second laser 12 is in the Y direction away from the distance d of center line 621=
0.6mm, distance of second collimation lens 22 in the X direction away from 12 luminous point of second laser is also d12=1.17mm, second is quasi-
The optical axis of straight lens 22 is in the Y direction away from the distance d of center line 623=0.44mm.The rear plane of second collimation lens 22 is to prism
The distance in 3 the second deviation face 312 is also d14The distance of=1mm, vertex B to the center line 6 in the second deviation face 312 is
0.56mm, the angle theta in the second deviation face 312 and optical axis2It is 77.45 °.
In this way, what first via light and the second tunnel optic path channel that first via optic path channel is transmitted were transmitted
Second road light exports the directional light parallel with optical axis after prism 3.Rear plane of 4 first surface of plus lens to prism 3
Distance d15=1mm, plus lens 4 with a thickness of 1mm, the radius of curvature of first surface and the second curved surface is 5mm, -5mm.Convergence
The aperture of lens 4 is 2.3mm, and multi-path parallel light converges at the F of the distance 4.8mm of the second curved surface away from plus lens 4.
Correspondingly, the third laser 13, third collimation lens 23 in third road optic path channel and third deviation face
313 position is designed according to the second tunnel optic path channel, the angle theta in third deviation face 31 and center line 63With second
The angle theta in deviation face 312 and center line 62It is equal, i.e. the angle theta in third deviation face 31 and center line 63It is 77.45 °.4th
4th laser 14, the 4th collimation lens 24 and the position in the 4th deviation face 314 in road optic path channel are according to the first via
The design of optic path channel, i.e., the angle theta in the 4th deviation face 31 and center line 64With the first deviation face 311 and center line
6 angle theta1It is equal, i.e., the angle theta in the 4th deviation face 31 and center line 64It is 60.3 °.
In a preferred embodiment, the corresponding laser in each optic path channel, which is close to each other, is pasted together, and leads to
The direction of propagation of the position change optical path of respective lens is overregulated, so that prism swashs the collimation for being incident to corresponding deviation face
Light is reflected, and the collimation laser after reflecting is parallel to the center line outgoing of prism.Very due to the distance between laser
It is small, the volume size of laser assembly can be further decreased.
It should be noted that the material of lens and prism used in above-described embodiment is not limited to cited material,
Relevant design parameter can also be optimized according to different demands, be not specifically limited herein.
Here, it is emphasized that numerical value above-mentioned is after rounding up as a result, each cited by aforementioned simultaneously
The deviation face of kind scheme is optimal as a result, guaranteeing that collimation laser reflects on deviation face relative to the angle value of center line 6
Afterwards along the direction outgoing for being parallel to optical axis.But during actual production manufacture, due to the error or other factors of technique
Consider, deviation face may be not identical with aforementioned list relative to the angle value of center line 6, that is, there is certain tolerance model
It encloses.Inventor, when tolerance is controlled at ± 1 °, equally enables to collimation laser on deviation face by a large amount of experiment discovery
Along the direction outgoing for being parallel to optical axis after refraction.
It is different from the prior art, the present invention leads to the laser that various lasers are emitted by mutually independent optic path
Road transmission, the optical path in each optic path channel is almost the same, guarantees outgoing light power equalization, reduces optical path loss.Simultaneously
Prism with multiple deviation faces can be compatible with multiple optic path channels, to correspond to multiple collimation lasers after deviation
With the centerline parallel of prism, reduce the distance between adjacent beams, to reduce the package dimension of laser assembly.Together
When, the manufacture craft of laser assembly of the invention is simple, and yields is high, convenient for batch production.
The present invention also provides a kind of optical module, which includes the laser assembly and light of any of the above-described embodiment
Fibre, optical fiber is used to receive the laser that the plus lens 4 of laser assembly is emitted, and the laser is transferred to corresponding module, with
Photoelectric conversion is carried out, to realize the function of optic communication.
Structure about laser assembly please refers to FIG. 1 to FIG. 3 and corresponding verbal description, here, repeating no more.
It is different from the prior art, the laser that the laser assembly in optical module of the invention is emitted various lasers leads to
Mutually independent optic path channel transfer is crossed, the optical path in each optic path channel is almost the same, guarantees that outgoing optical power is equal
Weighing apparatus, reduces optical path loss.Simultaneously there is the prism in multiple deviation faces can be compatible with multiple optic path channels, it will with correspondence
Multiple collimation lasers, with the centerline parallel of prism, reduce the distance between adjacent beams, to reduce after deviation
The package dimension of laser assembly.Meanwhile the manufacture craft of laser assembly of the invention is simple, yields is high, convenient for batch
Production.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of laser assembly, which is characterized in that the laser assembly includes multiple optic path channels, the laser
Component includes: multiple lasers (1), multiple collimation lenses (2) and prism (3), wherein the prism (3) includes multiple inclined
Folding face (31)；
Each optic path channel is including described in a laser (1), a collimation lens (2) and one
Deviation face (31)；In any optic path channel, the collimation lens (2) is for issuing the laser (1)
Laser carry out collimation processing formed collimation laser；The prism (3) is used to swash the collimation for being incident to corresponding deviation face (31)
Light is reflected, so that the collimation laser after reflecting is parallel to center line (6) outgoing of the prism (3).
2. laser assembly according to claim 1, which is characterized in that the prism (3) is in relative to its center line (6)
Symmetrical structure；The number of the laser (1), the collimation lens (2) and the deviation face (31) is even number, the laser
The number of device (1), the collimation lens (2) and the deviation face (31) is equal；
Wherein the laser (1) of half number is arranged in the first side of the center line (6) of the prism (3), the other half number
Second side in the center line (6) of the prism (3) is arranged in laser (1)；
Wherein the collimation lens (2) of half number is arranged in the first side of the center line (6) of the prism (3), the other half number
Collimation lens (2) setting the prism (3) center line (6) second side；
Wherein the deviation face (31) of half number is arranged in the first side of the center line (6) of the prism (3), the other half number
Second side in the center line (6) of the prism (3) is arranged in deviation face (31).
3. laser assembly according to claim 2, which is characterized in that the deviation face (31) far from the center line (6)
Angle relative to the center line (6) is less than the deviation face (31) close to the center line (6) relative to the center line (6)
Angle.
4. laser assembly according to claim 1, which is characterized in that each deviation face (31) is relative to the center line
(6) angular range is 5 °~85 °.
5. laser assembly according to claim 1, which is characterized in that the prism (3) is in relative to its center line (6)
Symmetrical structure, the prism (3) include the first deviation face (311), the second deviation face (312), third deviation face (313) and the
Four deviation faces (314)；First deviation face (311) and second deviation face (312) are distributed in the of the center line (6)
Side, third deviation face (313) and the 4th deviation face (314) are distributed in second side of the center line (6)；
First deviation face (311) is 71.22 ° ± 1 ° relative to the angle of the center line (6), second deviation face
(312) angle relative to the center line (6) is 83.16 ° ± 1 °, and third deviation face (313) is relative to the center
The angle of line (6) is 83.16 ° ± 1 °, and the 4th deviation face (314) is 71.22 ° relative to the angle of the center line (6)
±1°；Or
First deviation face (311) is 60.3 ° ± 1 ° relative to the angle of the center line (6), second deviation face
(312) angle relative to the center line (6) is 77.45 ° ± 1 °, and third deviation face (313) is relative to the center
The angle of line (6) is 77.45 ° ± 1 °, the 4th deviation face (314) relative to the angle of the center line (6) be 60.3 ° ±
1°。
6. laser assembly according to claim 1, which is characterized in that described in any optic path channel
The width in deviation face (31) is not less than the diameter of the collimation laser, so that the collimation laser will not be projected to adjacent deviation
On face (31).
7. laser assembly according to claim 1, which is characterized in that the prism (3) deviates from the deviation face (31)
Side be provided with multiple filter plates (7), the number of the filter plate (7) is equal with the number of the deviation face (31).
8. laser assembly according to claim 1, which is characterized in that be additionally provided with increasing on each deviation face (31)
Permeable membrane.
9. laser assembly according to claim 1, which is characterized in that the laser assembly further includes plus lens
(4)；
Straight line where the optical axis of the plus lens (4) is overlapped with the straight line where the center line (6)；
The plus lens (4) is used to converge the collimation laser being emitted from the prism (3).
10. a kind of optical module, which is characterized in that the optical module includes laser group as described in any one of claims 1 to 9
Part and optical fiber；The optical fiber is used to receive the laser of plus lens (4) outgoing of the laser assembly.
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| CN201810877330.7A CN109061810B (en) | 2018-08-03 | 2018-08-03 | Laser assembly and corresponding optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810877330.7A CN109061810B (en) | 2018-08-03 | 2018-08-03 | Laser assembly and corresponding optical module |
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| CN109061810B CN109061810B (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114296089A (en) * | 2022-03-03 | 2022-04-08 | 深圳市海创光学有限公司 | Optical system and laser radar |
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| US5594752A (en) * | 1992-12-07 | 1997-01-14 | Sdl, Inc. | Diode laser source with concurrently driven light emitting segments |
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| CN109061810B (en) | 2020-10-09 |
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