CN103346467A - Multi-laser-medium integration gain system - Google Patents
Multi-laser-medium integration gain system Download PDFInfo
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- CN103346467A CN103346467A CN2013102361955A CN201310236195A CN103346467A CN 103346467 A CN103346467 A CN 103346467A CN 2013102361955 A CN2013102361955 A CN 2013102361955A CN 201310236195 A CN201310236195 A CN 201310236195A CN 103346467 A CN103346467 A CN 103346467A
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Abstract
The invention provides a multi-laser-medium integration gain system. Pumping coupling modules in the gain system output light, the pump light is led into a cooling liquid box through reflecting mirrors, and the pump light is fully absorbed after passing through multiple laser media in the cooling liquid box. The absorption coefficient of the laser medium in the middle of the cooling liquid box is highest, and absorption coefficients of the remaining laser media gradually become low from the middle to the left side and the right side. Therefore, the formed gradually-changed absorption distribution enables all the laser media to evenly absorb the pump light. The pump light is incident perpendicular to the end faces of the laser media. The pumping effect can not be affected by changes of distances among the laser media. Due to the flexible changes of the distances among the laser media, great convenience can be brought for the design of a layer flow field. The advantage of integration of a multi-laser-medium gain module is kept, and in addition, the design difficulty of the gain module is greatly reduced, so that properties are greatly improved. The multi-laser-medium integration gain system is simple in structure, easy to machine, assemble and adjust and low in cost.
Description
Technical field
The invention belongs to the superpower laser field, be specifically related to the integrated gain system of a kind of many laser mediums.Be used for the development of high power, high light beam quality laser novel gain module.
Background technology
Along with the deep propelling of diode pumping solid laser to the high-tech application field, power output and the beam quality of laser are all had higher requirement.The quantity that just needs to increase the bore of laser medium and increase laser medium for the power output that improves laser realizes the calibration of laser power is amplified, and the method for employing large-caliber laser medium is with the apparent restriction that is limited by the material growth limit, thus, adopting the multi-disc laser medium will be the main method that addresses this problem.But the continuous increase along with laser medium, the volume of laser becomes problem big and the weight weightening finish and will show especially out, application in actual environment causes great inconvenience to laser, and adopting the integrated gain module of many laser mediums in the laser is the effective ways that address this problem.Simultaneously, for the ease of applying, system needs reliably, cost is low.
Existing gain module system mainly contains two kinds of forms: 1) single laser medium gain module: constitute single laser medium gain module by single laser medium, pumping coupling system and cooling system.2) the integrated gain module of many laser mediums: be immersed in after the little spacing of multi-disc laser medium arranged in the refractive index coupling cooling fluid and with the integrated gain module of profile pump coupled system formation laser medium more than.
Above-mentioned two kinds of gain modules come with some shortcomings and are: need a plurality of single laser medium gain modules are cascaded in superpower laser, each single laser medium gain module need have independent water route and Circuits System, usually select space filtering between each gain module for use, improve beam quality as technological means such as transmission or compensating glass, the whole optical path system complex, debugging difficulty is big.Laser will mate cooling fluid by refractive index in the integrated gain module of existing many laser mediums, this is laminar flow with regard to the flow field that requires refractive index coupling cooling fluid to constitute, the condition of laminar flow impels the spacing of each laser medium in the integrated gain module of many laser mediums enough little, and the pump mode of the integrated gain module of existing many laser mediums retrains mutually with the laser medium spacing.If obtain uniform pumping, then the laser medium spacing is just big, destroys the laminar flow condition in flow field; The laser medium spacing is little, has realized laminar flow condition, and then pumping is difficult to again obtain evenly, this just very big restriction the integrated advantages of many laser mediums, in addition, the clamping of the laser medium in the existing system is fixing also big problem.Hence one can see that, though the more single laser medium gain module of the integrated gain module of existing many laser mediums is greatly improved, requires to have influenced with the mutual restriction of uniform pumping performance and the result of use of the integrated gain mould of many laser mediums owing to laminar flow.
Summary of the invention
The purpose of this invention is to provide the integrated gain system of a kind of many laser mediums, mainly is to absorb the structure of arranging by the integrated gradual change of many laser mediums to realize.
The integrated gain system of many laser mediums of the present invention is characterized in, described gain system comprises the first pumping coupling module, the second pumping coupling module, first speculum, second speculum, cooling fluid box, laser medium and cooling fluid.The described first pumping coupling module, the second pumping coupling module are separately positioned on the two ends of cooling fluid box, first speculum is placed in the below of the first pumping coupling module, the angle of the first pumping coupling module and first speculum is 45 °, second speculum is placed in second pumping coupling module below, and the angle of the second pumping coupling module and second speculum is 45 °.Being full of in the cooling fluid box has cooling fluid, is arranged with several pieces laser mediums in the cooling fluid box in parallel.Its light channel structure is, the emergent light of the first pumping coupling module from left to right enters into laser medium through cooling fluid box, cooling fluid after by first mirror reflects successively, the emergent light of the second pumping coupling module enters into laser medium through cooling fluid box, cooling fluid after by second mirror reflects successively from right to left, laser medium absorption coefficient in cooling fluid box center is the highest, the laser medium absorption coefficient is become gradual change to absorb and is arranged by center laser medium both sides laser medium step-down one by one to the left and right.The gradual change of laser medium absorbs to arrange and can realize that every laser medium is to the even absorption of pump light.The pump light of the first pumping coupling module, the second pumping coupling module outgoing is perpendicular to the laser medium end face, this has guaranteed that the laser medium spacing can change freely, and can not influence the effect of pumping, bring great convenience for the design in laser medium interflow flow field and can change the laser medium spacing flexibly, the integrated advantage that had both kept many laser mediums gain module has significantly reduced the design difficulty of gain module again and has improved performance.
The light source bore of the described first pumping coupling module, the second pumping coupling module is 10mm * 10mm ~ 10mm * 20mm, is complementary with the laser medium bore, and surface uniformity is greater than 90%, and wavelength is 805nm.
The clear aperture of described first speculum, second speculum is 20mm * 20mm ~ 20mm * 35mm, and greater than 99%, material is optical glass to the reflectivity of 805nm laser.
The clear aperture of described cooling fluid box is 30mm * 30mm ~ 30mm * 35mm, and material is optical glass, logical light mouth plating 805nm anti-reflection film, and transmitance is greater than 99.5%.
The quantity of described laser medium is 10 ~ 20, and thickness is 2mm, and the scope of doping content is 0.15at.% ~ 0.70at.%, and material is the neodymium-doped yttrium-fluoride lithium.
Refractive index and the laser medium of described cooling fluid are complementary.
Described speculum is 45 ° of high reflective mirrors.
The clear aperture of described cooling fluid box is than the big 10mm ~ 15mm of laser medium bore.
The clear aperture of described laser medium is 10mm * 10mm ~ 10mm * 20mm.
Described cooling fluid is that the refractive index with the neodymium-doped yttrium-fluoride lithium material is complementary.
In the integrated gain system of many laser mediums of the present invention, pumping coupling module output light imports the cooling fluid box through speculum with pump light, pump light is again by fully being absorbed behind the multi-disc laser medium, the absorption coefficient of the laser medium in the middle of the cooling fluid box is the highest, the absorption coefficient of laser medium is by centre step-down one by one to the left and right sides, the gradual change of laser medium absorbs to arrange and can realize that every laser medium is to the even absorption of pump light, be perpendicular to the laser medium surface feeding sputtering from the pump light of pumping coupling module outgoing simultaneously, the spacing that changes laser medium freely can't influence the effect of pumping, this shows, the gradual change of many laser mediums absorbs arranges and the configuration of pump light vertical incidence laser medium end face is easy to guarantee the uniform absorption of every laser medium, simultaneously can not go to influence the spacing of laser medium again, be that pumping coupling and flow field laminar flow are separate, do not restrict mutually, bring great convenience for the design in laser medium interflow flow field and can change the laser medium spacing flexibly, make laminar flow be easy to realize, this had both kept the integrated advantage of many laser mediums gain module, had significantly reduced the design difficulty of gain module again and had improved performance.
The pumping coupling module, speculum, cooling fluid box, laser medium and the cooling fluid that adopt in the integrated gain system of many laser mediums of the present invention all are general optical materials.Gain system of the present invention is simple in structure, is easy to process and debug, and cost is low.
Description of drawings
Fig. 1 is the index path of the integrated gain system of many laser mediums of the present invention;
Among the figure, the 1. first pumping coupling module, 2. second pumping coupling modules, 3. first speculums, 4. second speculums, 5. cooling fluid boxes, 6. laser mediums, 7. cooling fluids.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment 1
Fig. 1 is the index path of the integrated gain system of a kind of many laser mediums of the present invention.Among Fig. 1, the integrated gain system of many laser mediums of the present invention comprises the first pumping coupling module 1, the second pumping coupling module 2, first speculum 3, second speculum 4, cooling fluid box 5, laser medium and cooling fluid 7; The described first pumping coupling module 1, the second pumping coupling module 2 are separately positioned on the two ends of cooling fluid box 5, first speculum 3 is placed in the below of the first pumping coupling module 1, the angle of the first pumping coupling module 1 and first speculum 3 is 45 °, the angle that second speculum, 4, the second pumping coupling modules 2 and second speculum 4 are placed in the second pumping coupling module, 2 belows is 45 °; Being full of in the cooling fluid box 5 has cooling fluid 7, is arranged with several pieces laser mediums in the cooling fluid box 5 in parallel.Its light channel structure is, the emergent light of the first pumping coupling module 1 from left to right enters into laser medium through cooling fluid box 5, cooling fluid 7 after reflecting by first speculum 3 successively, the emergent light of the second pumping coupling module 2 enters into laser medium through cooling fluid box 5, cooling fluid 7 after reflecting by second speculum 4 successively from right to left, the laser medium absorption coefficient by the center laser medium to the left and right the both sides laser medium die down one by one, become gradual change to absorb and arrange; Laser medium is that gradual change absorbs to the outgoing pump light of the first pumping coupling module 1 and the second pumping coupling module 2, the absorption of the laser medium in the middle of cooling fluid box 5 is the strongest, the gradual change of laser medium absorbs to arrange and can realize every laser medium to the even absorption of pump light, and the pump light of the first pumping coupling module 1,2 outgoing of the second pumping coupling module is perpendicular to the laser medium end face.The spacing that changes laser medium freely can't influence the effect of pumping, bring great convenience to the design to laser medium interflow flow field and can change the laser medium spacing flexibly, the integrated advantage that had both kept many laser mediums gain module has significantly reduced the design difficulty of gain module again and has improved performance.
The light source bore of the described first pumping coupling module 1, the second pumping coupling module 2 is 10mm * 10mm, and surface uniformity is greater than 90%, and wavelength is 805nm.
The clear aperture of described first speculum 3, second speculum 4 is 20mm * 20mm, and greater than 99%, material is optical glass to the reflectivity of 805nm laser.
The clear aperture of described cooling fluid box 5 is 30mm * 30mm, and material is optical glass, logical light mouth plating 805nm anti-reflection film, and transmitance is greater than 99.5%.
The clear aperture of described laser medium is 10mm * 10mm, and thickness is 2mm.
The quantity of the laser medium that arranges in the present embodiment is 10, and laser medium 6 is wherein 1.The scope of laser medium doping content is 0.3at.% ~ 0.70at.%, and the material of laser medium is the neodymium-doped yttrium-fluoride lithium.
Refractive index and the laser medium of described cooling fluid 7 are complementary.
The refractive index of described cooling fluid 5 and neodymium-doped yttrium-fluoride lithium material are complementary, and the cooling fluid material is CCl4.
Embodiment 2
Present embodiment is identical with the basic structure of embodiment 1, and difference is, in the present embodiment, the light source bore of the described first pumping coupling module is 10mm * 20mm, and the light source bore of the second pumping coupling module is 10mm * 20mm.
The clear aperture of described first speculum is 20mm * 35mm, and the clear aperture of second speculum is 20mm * 35mm.
The clear aperture of described cooling fluid box is 30mm * 35mm.
The clear aperture of described laser medium is 10mm * 20mm, and thickness is 2mm, and the quantity of the laser medium of setting is 20, and material is the neodymium-doped yttrium-fluoride lithium, and the scope of doping content is 0.15at.% ~ 0.35at.%.
Claims (8)
1. the integrated gain system of laser medium more than a kind, it is characterized in that: described gain system comprises the first pumping coupling module (1), the second pumping coupling module (2), first speculum (3), second speculum (4), cooling fluid box (5), laser medium and cooling fluid (7); The described first pumping coupling module (1), the second pumping coupling module (2) are separately positioned on the two ends of cooling fluid box (5), first speculum (3) is placed in the below of the first pumping coupling module (1), the first pumping coupling module (1) is 45 ° with the angle of first speculum (3), second speculum (4) is placed in the second pumping coupling module (2) below, and the second pumping coupling module (2) is 45 ° with the angle of second speculum (4); Being full of in the cooling fluid box (5) has cooling fluid (7), and the cooling fluid box is arranged with several pieces laser mediums in parallel in (5); Its light channel structure is, the emergent light of the first pumping coupling module (1) passes through cooling fluid box (5) after reflecting by first speculum (3) successively, cooling fluid (7) from left to right enters into laser medium, the emergent light of the second pumping coupling module (2) passes through cooling fluid box (5) after reflecting by second speculum (4) successively, cooling fluid (7) enters into laser medium from right to left, the laser medium absorption coefficient by the center laser medium to the left and right the both sides laser medium die down one by one, become gradual change to absorb and arrange; The pump light of the first pumping coupling module (1), second pumping coupling module (2) outgoing is perpendicular to the laser medium end face.
2. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: the light source bore of the described first pumping coupling module (1), the second pumping coupling module (2) is 10mm * 10mm ~ 10mm * 20mm, surface uniformity is greater than 90%, and wavelength is 805nm.
3. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: the clear aperture of described first speculum (3), second speculum (4) is 20mm * 20mm ~ 20mm * 35mm, to the reflectivity of 805nm laser greater than 99%.
4. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: the clear aperture of described cooling fluid box (5) is 30mm * 30mm ~ 30mm * 35mm, logical light mouth plating 805nm anti-reflection film, transmitance is greater than 99.5%.
5. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: described laser medium clear aperture is 10mm * 10mm ~ 10mm * 20mm, thickness is 2mm.
6. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: the quantity of described laser medium is 10 ~ 20.
7. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: the scope of laser medium doping content is 0.15at.% ~ 0.70at.%.
8. the integrated gain system of a kind of many laser mediums according to claim 1, it is characterized in that: refractive index and the laser medium of described cooling fluid (7) are complementary.
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| CN2013102361955A CN103346467A (en) | 2013-06-17 | 2013-06-17 | Multi-laser-medium integration gain system |
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| CN2013102361955A CN103346467A (en) | 2013-06-17 | 2013-06-17 | Multi-laser-medium integration gain system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107492785A (en) * | 2017-08-16 | 2017-12-19 | 西安炬光科技股份有限公司 | A kind of semiconductor laser light source module for realizing circular light spot and profile pump device |
| CN107565359A (en) * | 2017-08-16 | 2018-01-09 | 西安炬光科技股份有限公司 | A kind of semiconductor laser side face-pumping pumping system |
| CN108923231A (en) * | 2018-07-30 | 2018-11-30 | 中国工程物理研究院应用电子学研究所 | A kind of direct liquid cooling distributed gain laser based on polarization bilateral side pump |
| CN111244733A (en) * | 2020-02-11 | 2020-06-05 | 中国工程物理研究院应用电子学研究所 | Variable-caliber multi-pass laser amplifier based on direct liquid cooling array distribution gain module |
| CN114824998A (en) * | 2022-06-30 | 2022-07-29 | 中国工程物理研究院应用电子学研究所 | High-overlapping-efficiency distributed reflection type direct liquid-cooling laser gain device |
| CN117134179A (en) * | 2023-10-26 | 2023-11-28 | 中国工程物理研究院应用电子学研究所 | Angle array type gain module capable of eliminating return light and preventing self-oscillation and laser amplifying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107492785A (en) * | 2017-08-16 | 2017-12-19 | 西安炬光科技股份有限公司 | A kind of semiconductor laser light source module for realizing circular light spot and profile pump device |
| CN107565359A (en) * | 2017-08-16 | 2018-01-09 | 西安炬光科技股份有限公司 | A kind of semiconductor laser side face-pumping pumping system |
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| CN107565359B (en) * | 2017-08-16 | 2019-09-17 | 西安炬光科技股份有限公司 | A kind of semiconductor laser side face-pumping pumping system |
| CN108923231A (en) * | 2018-07-30 | 2018-11-30 | 中国工程物理研究院应用电子学研究所 | A kind of direct liquid cooling distributed gain laser based on polarization bilateral side pump |
| CN111244733A (en) * | 2020-02-11 | 2020-06-05 | 中国工程物理研究院应用电子学研究所 | Variable-caliber multi-pass laser amplifier based on direct liquid cooling array distribution gain module |
| CN114824998A (en) * | 2022-06-30 | 2022-07-29 | 中国工程物理研究院应用电子学研究所 | High-overlapping-efficiency distributed reflection type direct liquid-cooling laser gain device |
| CN117134179A (en) * | 2023-10-26 | 2023-11-28 | 中国工程物理研究院应用电子学研究所 | Angle array type gain module capable of eliminating return light and preventing self-oscillation and laser amplifying device |
| CN117134179B (en) * | 2023-10-26 | 2024-03-29 | 中国工程物理研究院应用电子学研究所 | Angle array type gain module capable of eliminating return light and preventing self-oscillation and laser amplifying device |
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Inventor after: Tang Chun Inventor after: Jiang Jianfeng Inventor after: Fan Guobin Inventor after: Gao Qingsong Inventor after: Guan Youguang Inventor before: Tang Chun Inventor before: Jiang Jianfeng |
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Application publication date: 20131009 |