CN107589499A - More branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror - Google Patents
More branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror Download PDFInfo
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- CN107589499A CN107589499A CN201710912073.1A CN201710912073A CN107589499A CN 107589499 A CN107589499 A CN 107589499A CN 201710912073 A CN201710912073 A CN 201710912073A CN 107589499 A CN107589499 A CN 107589499A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 53
- 239000013307 optical fiber Substances 0.000 title claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
A kind of coupled system that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror, including semiconductor laser, collimation lens, terraced mirror, condenser lens and optical fiber；Collimation lens is provided with before each semiconductor laser correspondence position；Terraced mirror is provided with horizontal part and rake, and horizontal part and rake are alternately arranged, and rake is provided with reflective prism, and rake angle of inclination is 44.8~45.2 degree, and rake is emitted light direction into 44.8~45.2 degree with semiconductor laser；Collimation lens is between semiconductor laser and terraced mirror；Condenser lens is located at the reflective side of reflective prism, and optical fiber light inputting end is in condenser lens light extraction end focal point.The present invention has the advantage that：Simple in construction, cost is cheap, it not only install combination it is simple and convenient, can also accelerate and be up to more than 85% to improve its coupling efficiency, realize output high power density laser, and time and labour saving.
Description
Technical field
The present invention relates to laser technology field, and in particular to more branch semiconductor lasers are coupled into list by one kind based on terraced mirror
The coupled system of root optical fiber.
Background technology
Field is had a wide range of applications by the semiconductor laser of optical fiber output.Either laser scalpel or work
Industry laser marking, cutting or all solid laser and optical fiber laser, it is required for that there is good beam quality, high power density
And the LASER Light Source of using flexible.Semiconductor laser coupling is entered into simple optical fiber to export again, this demand can be met.It is real
The method of existing high power density optical fiber output laser has two kinds：First, the Output optical power for improving single semiconductor laser is close
Degree；Second, exported after the light that multiple semiconductor laser chips export is combined.
Improvement dependent on coupling technique is the main path of currently acquired high-power and super high power laser output.As specially
A kind of coupled systemes by integrating duplex splitted semiconductor laser into single optical fiber described in sharp application number CN201120534542.9
System, including multiple path laser, a ladder is heat sink, a condenser lens, a coupling optical fiber；The laser is installed by transition heat sink
In in the heat sink ladder plane of the ladder, being sequentially provided with before each laser and coaxial one fast of Laser Output Beam
Axle collimation lens, one make Laser Output Beam reflex to the reflecting prism of the convergent lens plane of incidence with same direction；Often
Equivalent optical path of one laser output to its corresponding reflecting prism exit facet；After the convergent lens exit facet be provided with
Its coaxial coupling optical fiber；Wherein, the reflecting prism is a total reflection prism, the plane of incidence of the total reflection prism or
Exit facet is the cylinder that a pair of Laser Output Beams carry out slow axis collimation.This device, laser are pacified by transition heat sink
It is coaxial with Laser Output Beam loaded on being sequentially provided with the heat sink ladder plane of the ladder, and before each laser
One fast axis collimation lens, the installation of structure is with combining complexity；Meanwhile only used a ladder heat sink, simply one coupled
The light of semiconductor laser chip output on ladder is heat sink, will be because when quantity increases again though efficiency increases
Refraction or reflection, which produce excessive loss, causes coupling efficiency low；In addition, total reflection prism quantity causes cost high and more difficult more
Cause increase debugging difficulty is led in alignment center.
Thus, existing more branch semiconductor lasers are coupled into the coupled system of simple optical fiber, still because of its structure the reason for
There is installation and the deficiency for combining complexity；Meanwhile its quantity increase also results in excessive loss to produce coupling efficiency low
Deficiency, and cost is higher, and debugging is also time consuming.
The content of the invention
It is an object of the invention to provide a kind of simple in construction, cost it is cheap based on terraced mirror by more branch semiconductor lasers
Be coupled into the coupled system of simple optical fiber, it not only install combination it is simple and convenient, can also accelerate improve its coupling effect
Rate is up to more than 85%, realizes output high power density laser, and time and labour saving.
The purpose of the present invention realizes that it includes semiconductor laser, collimation lens, ladder by such technical scheme
Mirror, condenser lens and optical fiber；Collimation lens is provided with before each semiconductor laser correspondence position；Terraced mirror is provided with horizontal part and inclined
Inclined portion, horizontal part and rake are alternately arranged, and rake is provided with reflective prism, and rake angle of inclination is 44.8~45.2
Degree, rake are emitted light direction into 44.8~45.2 degree with semiconductor laser；Collimation lens is in semiconductor laser and terraced mirror
Between；Condenser lens is located at the reflective side of reflective prism, and optical fiber light inputting end is in condenser lens light extraction end focal point.
In the present invention, collimation lens is provided with before each semiconductor laser correspondence position, collimation lens can respectively half-and-half
The fast axle and slow axis for the light beam that conductor laser is sent are collimated；Terraced mirror rake is provided with reflective prism, and reflective prism can
So that light beam to be reflected, because rake angle of inclination is 44.8~45.2 degree, rake and semiconductor laser emergent light
Direction is into 44.8~45.2 degree；Ensure that light beam is transmitted to condenser lens close to 90 degree of corners；Optical fiber light inputting end is in condenser lens
Light extraction end focal point, coupled into optical fibres after light beam line focus lens focus.
Semiconductor laser in the present invention can multi-level arranged, can be arranged with single or multiple lift circular arrangement,
It can be single or multiple lift square arrangement arrangement, can also be irregular shape arranged.
By adopting the above-described technical solution, the present invention has the advantage that：Simple in construction, cost is cheap, and it is not only
Installation combination is simple and convenient, can also accelerate and be up to more than 85% to improve its coupling efficiency, realize that output high power is close
Spend laser, and time and labour saving.
Brief description of the drawings
The brief description of the drawings of the present invention is as follows：
Fig. 1 is a kind of schematic diagram of the present invention；
Fig. 2 is second of schematic diagram of the present invention；
Fig. 3 is the third schematic diagram of the present invention；
Fig. 4 is a kind of schematic diagram of the partial component of the present invention.
In figure：1. semiconductor laser；2. collimation lens；3. terraced mirror；4. condenser lens；5. optical fiber；6. horizontal part；7. incline
Inclined portion；9. light beam；10. fast axis collimation lens；11. slow axis collimation lens.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1 to Figure 3, the present invention includes semiconductor laser 1, collimation lens 2, terraced mirror 3, condenser lens 4 and light
Fibre 5；Collimation lens 2 is provided with before each correspondence position of semiconductor laser 1；Terraced mirror 3 is provided with horizontal part 6 and rake 7, horizontal
Portion 6 and rake 7 are alternately arranged, and rake 7 is provided with reflective prism, and the angle of inclination of rake 7 is 44.8~45.2 degree, is tilted
Portion 7 is emitted light direction into 44.8~45.2 degree with semiconductor laser 1；Collimation lens 2 semiconductor laser 1 and terraced mirror 3 it
Between；Condenser lens 4 is located at the reflective side of reflective prism, and the light inputting end of optical fiber 5 is in the light extraction end focal point of condenser lens 4.
In the present invention, collimation lens 2 is provided with before each correspondence position of semiconductor laser 1, collimation lens 2 can be right respectively
The fast axle and slow axis for the light beam 9 that semiconductor laser 1 is sent are collimated；The terraced rake of mirror 3 is provided with reflective prism, reflection edge
Mirror can be reflected light beam 9, because the angle of inclination of rake 7 is 44.8~45.2 degree, rake 7 and semiconductor laser
1 outgoing light direction is into 44.8~45.2 degree；Ensure that light beam 9 is transmitted to condenser lens 4 close to 90 degree of corners；The light inputting end of optical fiber 5
The coupled into optical fibres 5 after the light extraction end focal point of condenser lens 4, the line focus lens focus 4 of light beam 9.
Further, in the present invention, the curve of the curved surface of collimation lens 2 and condenser lens 4 meets equation：Z=cr2/
(1+√(1-1+kc2r2)), wherein, c is curvature, and c=1/R, R are radius of curvature, and k is quadratic curvature coefficient, and r is point on curved surface
Radius, c=1/R, R are radius of curvature, and k is quadratic curvature coefficient, r be on curved surface point to the distance of z-axis.
In the present invention, the value ginseng of collimation lens 2 (fast axis collimation lens 10 and slow axis collimation lens 11) and condenser lens 5
Number scope：
Wherein, thickness is the thickness of each lens, and half height is vertical range of the lens centre to rims of the lens, and r1, k1 are
The value of lens one side, r2, k2 are the value of the another side of lens, and "-" represents do not have.
The number of plies of terraced mirror reflecting surface is two layers of a width of 10mm (depending on the semiconductor laser quantity being arranged side by side), instead
The height for penetrating face (defines) for 5mm according to the size of hot spot.
Further, in one embodiment, value is as follows：
Wherein, thickness is the thickness of each lens, and half height is vertical range of the lens centre to rims of the lens, and r1, k1 are
The value of lens one side, r2, k2 are the value of the another side of lens.
As shown in figure 4, the design example is arranged for Ou Silang 450nm-1.6w semiconductor laser in a manner of 2*2
Row, it is as follows to obtain data：
Optical fiber 200um-400um coupling efficiencies are up to more than 60%；
Optical fiber 400um-600um coupling efficiencies are up to more than 80%；
Optical fiber is more than 600um coupling efficiencies up to more than 85%.
Further, the spherical mirror, aspherical mirror or cylindrical mirror that collimation lens 2 is 1 or more than 1；Such as Fig. 1 institutes
Show, collimating mirror 2 is the combination of two lens, respectively fast axis collimation lens 10 and slow axis collimation lens 11, respectively to light beam 9
Fast axle and slow axis are collimated.
Further, as shown in Fig. 1 Fig. 3, condenser lens 4 is single or multiple spherical mirrors or aspherical mirror；Its is main
Effect reflecting prism is reflected light beam 9 is focused and is coupled into optical fiber 5.
Further, the plane of incidence or/and exit facet of 2 groups of collimation lens and condenser lens 4 are coated with anti-reflection film；Anti-reflection film
Set, the light transmittance of light beam 9 can be increased, improve the coupling efficiency of light beam 9.
Further, in the present invention, terraced mirror 3 arranged in parallel 2 or more than 2 or/and terraced mirror 3 can be provided with 1 simultaneously
It is individual or 1 with upper inclined portion 7；It is reflective according to the different horizontal part 6 and rake 7 that need to increase terraced mirror 3, corresponding increase
Prism and semiconductor laser 1, to increase the power of output laser；The quantity that terraced mirror 3 can also be increased side by side according to demand is come
Realize the output of more power laser；The horizontal part 6 of terraced mirror 3 and the number of the quantity of rake 7 and terraced mirror can also be increased simultaneously
Measure to reach the output of high power laser light.
Further, in the present invention, reflecting prism can also be reflective mirror, and can also be coated with thereon reflective
Film, to obtain more preferable reflecting effect, avoid light beam 9 because reflecting effect is bad and caused by waste, improve coupling efficiency.
Further, in the present invention, the angle of inclination of rake 7 is the sharp angle that inclination angle is formed with horizontal line, its
Light direction reaching the level of light beam 9 at condenser lens can be emitted with conjunction with semiconductors laser 1.Optimal case is rake 7
Angle of inclination is 45 degree, and rake 7 is emitted light direction into 45 degree with semiconductor laser 1；Ensure that the normal sheaf of light beam 9 focuses on
Lens 4.
Further, in the present invention, as depicted in figs. 1 and 2, terraced mirror 3 is that both sides can be provided with rake 7；Such as Fig. 2
It is shown, rake 7 can also be provided with its side；Rake 7 can also be interval with；The main function of horizontal part 6 is regulation
The distance between same gradient upper inclined portion 7, its length can be adjusted as needed.
Further, can be opposite towards two respectively as shown in figure 3, when the terraced both sides of mirror 3 can be provided with rake 7
Direction occur light beam 9 and to be coupled into optical fiber 5.
When light beam 9 passes through lens curved surface, the theoretical reflectance rate (optics study course second edition, the leaf that are gone out by the Fei Nier derivations of equation
Yutang, Xiao Jun, rich build treasure etc. and write) Binding experiment test data, off-energy caused by reflection two is 4%~6%, thus,
The lens that light beam 9 passes through are more, and loss is bigger, and coupling efficiency is lower.Therefore the quantity of condenser lens 4 and collimation lens 2 it is more few more
It is good.
Claims (14)
1. more branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror, it is characterised in that：Including partly leading
Body laser（1）, collimation lens（2）, terraced mirror（3）, condenser lens（4）And optical fiber（5）；Each semiconductor laser（1）It is corresponding
Collimation lens is provided with before position（2）；Terraced mirror（3）It is provided with horizontal part（6）And rake（7）, horizontal part（6）And rake（7）
It is alternately arranged, rake（7）It is provided with reflective prism, rake（7）Angle of inclination is 44.8~45.2 degree, rake（7）With
Semiconductor laser（1）Light direction is emitted into 44.8~45.2 degree；Collimation lens（2）In semiconductor laser（1）With terraced mirror（3）
Between；Condenser lens（4）It is located at the reflective side of reflective prism, optical fiber（5）Light inputting end is in condenser lens（4）Light extraction end focal point.
2. the coupled system according to claim 1 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Collimation lens（2）And condenser lens（4）The curve of curved surface meet equation：z=cr²/(1+√(1-（1+k）
C2r2)) formula is shown problematic, wherein, c is curvature, and c=1/R, R are radius of curvature, and k is quadratic curvature coefficient, and r is on curved surface
Distance of the point to z-axis.
3. the coupled systemes according to claim 1 or 2 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror
System, it is characterised in that：Collimation lens（2）For one or more spherical mirror, aspherical mirror or cylindrical mirror.
4. the coupled systemes according to claim 1 or 2 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror
System, it is characterised in that：Condenser lens（4）For single or multiple spherical mirrors or aspherical mirror.
5. the coupled system according to claim 3 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Condenser lens（4）For single or multiple spherical mirrors or aspherical mirror.
6. the coupled systemes according to claim 1 or 2 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror
System, it is characterised in that：Condenser lens（4）For single or multiple spherical mirrors or aspherical mirror.
7. the coupling that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror according to claim 1,2 or 5
System, it is characterised in that：Collimation lens（2）Group and condenser lens（4）The plane of incidence or/and exit facet be coated with anti-reflection film.
8. the coupled system according to claim 3 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Collimation lens（2）Group and condenser lens（4）The plane of incidence or/and exit facet be coated with anti-reflection film.
9. the coupled system according to claim 4 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Collimation lens（2）Group and condenser lens（4）The plane of incidence or/and exit facet be coated with anti-reflection film.
10. more branch semiconductor lasers are coupled into by simple optical fiber based on terraced mirror according to claim 1,2,5,8 or 9
Coupled system, it is characterised in that：Terraced mirror（3）Can simultaneously arranged in parallel 2 or more than 2 or/and terraced mirror（3）Provided with 1 or 1
It is individual with upper inclined portion（7）.
11. the coupled system according to claim 3 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Terraced mirror（3）Can simultaneously arranged in parallel 2 or more than 2 or/and terraced mirror（3）Provided with 1 or 1 with updip
Inclined portion（7）.
12. the coupled system according to claim 4 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Terraced mirror（3）Can simultaneously arranged in parallel 2 or more than 2 or/and terraced mirror（3）Provided with 1 or 1 with updip
Inclined portion（7）.
13. the coupled system according to claim 6 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Terraced mirror（3）Can simultaneously arranged in parallel 2 or more than 2 or/and terraced mirror（3）Provided with 1 or 1 with updip
Inclined portion（7）.
14. the coupled system according to claim 7 that more branch semiconductor lasers are coupled into simple optical fiber based on terraced mirror,
It is characterized in that：Terraced mirror（3）Can simultaneously arranged in parallel 2 or more than 2 or/and terraced mirror（3）Provided with 1 or 1 with updip
Inclined portion（7）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710912073.1A CN107589499A (en) | 2017-09-29 | 2017-09-29 | More branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror |
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| CN201710912073.1A CN107589499A (en) | 2017-09-29 | 2017-09-29 | More branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061810A (en) * | 2018-08-03 | 2018-12-21 | 武汉电信器件有限公司 | A kind of laser assembly and corresponding optical module |
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| CN102156352A (en) * | 2011-03-30 | 2011-08-17 | 青岛海信电器股份有限公司 | Beam shaping method and device thereof and laser display light source module and apparatus |
| CN202383321U (en) * | 2011-12-19 | 2012-08-15 | 北京凯普林光电科技有限公司 | Coupled system for coupling multichannel discrete semiconductor lasers into single fiber |
| CN202888604U (en) * | 2012-08-06 | 2013-04-17 | 北京大族天成半导体技术有限公司 | Semiconductor laser device |
| CN105759411A (en) * | 2016-04-15 | 2016-07-13 | 武汉凌云光电科技有限责任公司 | Optical fiber coupled laser, optical fiber coupled laser system and optimization method thereof |
| CN207675988U (en) * | 2017-09-29 | 2018-07-31 | 重庆光遥光电科技有限公司 | More branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror |
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2017
- 2017-09-29 CN CN201710912073.1A patent/CN107589499A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101144909A (en) * | 2007-10-25 | 2008-03-19 | 中国科学院长春光学精密机械与物理研究所 | Surface array semiconductor laser light beam shaping device |
| CN102141683A (en) * | 2011-03-30 | 2011-08-03 | 青岛海信电器股份有限公司 | Beam shaping method and device and laser display light source module and equipment |
| CN102156352A (en) * | 2011-03-30 | 2011-08-17 | 青岛海信电器股份有限公司 | Beam shaping method and device thereof and laser display light source module and apparatus |
| CN202383321U (en) * | 2011-12-19 | 2012-08-15 | 北京凯普林光电科技有限公司 | Coupled system for coupling multichannel discrete semiconductor lasers into single fiber |
| CN202888604U (en) * | 2012-08-06 | 2013-04-17 | 北京大族天成半导体技术有限公司 | Semiconductor laser device |
| CN105759411A (en) * | 2016-04-15 | 2016-07-13 | 武汉凌云光电科技有限责任公司 | Optical fiber coupled laser, optical fiber coupled laser system and optimization method thereof |
| CN207675988U (en) * | 2017-09-29 | 2018-07-31 | 重庆光遥光电科技有限公司 | More branch semiconductor lasers are coupled into the coupled system of simple optical fiber based on terraced mirror |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109061810A (en) * | 2018-08-03 | 2018-12-21 | 武汉电信器件有限公司 | A kind of laser assembly and corresponding optical module |
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