CN1564389A - Laser LED pump solid laser - Google Patents
Laser LED pump solid laser Download PDFInfo
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- CN1564389A CN1564389A CN 200410013012 CN200410013012A CN1564389A CN 1564389 A CN1564389 A CN 1564389A CN 200410013012 CN200410013012 CN 200410013012 CN 200410013012 A CN200410013012 A CN 200410013012A CN 1564389 A CN1564389 A CN 1564389A
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Abstract
The solid-state laser is a new type DPSSL module. Inside metal case, there are TEC refrigerator, pump, heat sink (2), lens group, Nd: YVO4 laser crystal, heat sink (8), cavity mirror, thermistor. Two heat sinks are connected to TEC refrigerator through laser welding. Lens group and cavity mirror are connected to heat sink (8) through laser welding. Advantages are: high conversion efficiency, small size, and high stability.
Description
Technical field
The present invention is a kind of laser diode-pumped solid state laser.
Background technology
Traditional solid YAG laser is made up of neodymium-doped yttrium-aluminum garnet crystal bar, pumping lamp, laser pump cavity, optical resonator, power supply and refrigerating system usually, and its conversion efficiency is 2% to 3%.Whole on the other hand laser needs huge refrigerating system, and volume is very big.The life-span of pumping lamp is about 300 to 1000 hours, operating personnel need spend a lot of times frequent change lamp, interrupt system work reduces the efficient of automatic production line greatly.Therefore technical do not have a big development space, and total solidifying laser diode solid state laser (DPSSL) will replace the lamp light-pumped solid state laser, and this is the developing direction of solid state laser.Owing to the maturation of high power laser diode (LD) manufacturing process and the reduction of production cost, make the research of diode pumping solid laser obtain very fast development, and formally enter commercialization in recent years.
The kind of laser diode pump solid state laser device is a lot, can be continuous, pulse, transfer Q, and add non-linear conversion such as frequency multiplication mixing.The shape of operation material has cylinder and lath-shaped.And the coupled modes of pumping are divided into direct end pumping, the face pumping of optical fiber coupled end and three kinds of structures of profile pump.The pump light of laser diode that pumping is used or diode laser matrix outgoing is coupled to pump light on the Nd:YAG crystal bar via convergence optical system, is coated with anti-reflection film to the 810nm wavelength for reducing coupling loss on the pumping coupling surface of crystal bar.Simultaneously, this end face also is the end that is all-trans of the resonant cavity of solid state laser, thereby the film of end face also is the laserresonator of 1.06 μ m, and the 1.06 μ m laser beams that produce after the starting of oscillation are by outgoing mirror coupling output.
Summary of the invention
Technical problem to be solved by this invention is: a kind of laser diode-pumped solid state laser that scale is produced in batches and used that is suitable for is provided.
The technical solution adopted in the present invention is: described solid state laser is the DPSSL module, as the pumping source of other laser, and output 1342nm laser.Its structure is: in its metal shell, be provided with TEC refrigerator, pumping LD and heat sink, set of lenses thereof, Nd:YVO
4Laser crystal and heat sink, chamber mirror thereof, thermistor, two heat sinkly connect by method for laser welding and the weldering of TEC refrigerator, and set of lenses and chamber mirror are by method for laser welding and Nd:YVO
4The heat sink weldering of laser crystal connects.
The present invention have conversion efficiency height, volume little, stablize high advantage, and technology is simple, with low cost, is suitable for scale and produces in batches and use.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is heat sink 8 a structural representation among Fig. 1.
Fig. 3 is the structural representation of set of lenses 4 among Fig. 1.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing.
One. laser diode-pumped solid state laser
Laser diode-pumped solid state laser is a kind of DPSSL module of new structure, and exportable 1342nm laser is as the pumping source of other laser.Its structure is as shown in Figure 1: in its metal shell 10, be provided with TEC refrigerator 1, pumping LD3 and heat sink 2, set of lenses 4 thereof, Nd:YVO
4Laser crystal 5 and heat sink 8, chamber mirror 6 thereof, thermistor 9, two are heat sink to be connected by laser welding technology and 1 weldering of TEC refrigerator.Set of lenses 4 and chamber mirror 6 connect by method for laser welding and heat sink 8 welderings.
Above-mentioned TEC refrigerator 1 can be to pumping LD and Nd:YVO
4Laser crystal 5 freezes, thereby can guarantee their operate as normal.Pumping LD can adopt the high-power single tube laser diode of 808nm, and a large amount of heats that produce during its output laser absorb by heat sink 2, thereby can guarantee its operate as normal.
Above-mentioned heat sink 8 structure is as shown in Figure 2: made by the circulating type red copper, be divided into heat sink 8-1,8-2 two parts, they surround Nd:YVO
4Laser crystal 5 and being fixed by screw 19,20 respectively simultaneously, is equipped with the heat-conducting silicone grease coating on both contact-making surfaces.Heat sink 8 effect is: Nd:YVO
4Laser crystal 5 produces a large amount of heats in the fashionable meeting of high power pumping laser fluence, because Nd:YVO
4Thermal conductivity lower (only be Nd:YAG half) therefore needs good heat abstractor to guarantee Nd:YVO
4The stability of optical property during laser crystal 5 work, heat sink 8 adopt very high red copper of thermal conductivity and circulating type design just to solve Nd:YVO well
4The heat dissipation problem of laser crystal 5.
The structure of set of lenses 4 is as shown in Figure 3: be made of two mutually perpendicular cylindrical mirrors 21,22 of main shaft, they firmly are connected with heat sink 8 by the laser welding mode.Their main shaft is parallel with the main shaft of pumping LD3 output laser respectively.Wherein: the main shaft of cylindrical mirror 21 is the x direction, is used for the axial hot spot of calibration of laser x; The main shaft of cylindrical mirror 22 is the y direction, is used for the axial hot spot of calibration of laser y; Both face of cylinder curvature is determined according to concrete laser beam divergence.The effect of set of lenses 4 is: the laser beam asymmetric, the Vernonia parishii Hook angle for pumping LD3 output carries out shaping and collimation, makes it evenly to inject Nd:YVO
4Laser crystal 5.
The pumping source of above-mentioned pumping LD3 is 808～810nm wavelength.LD Nd:YVO
4Laser crystal 5 is a gain medium, inject end face at its pumping laser and can be coated with that 808～810nm is anti-reflection, the high reflective film of 1330～1350nm, it constitutes resonant cavity in conjunction with the output plane dichroscope, and formation 1342nm is sharp to be penetrated, and is coupled into monomode fiber 7.Chamber mirror 6 is a level crossing, is coated with 1342nm part transmission optics film, constitutes the Effect of Back-Cavity Mirror of laserresonator; The chamber mirror firmly is connected with heat sink 8 by laser welding.Monomode fiber 7 coupling output 1342nm laser.Thermistor 9 is used to monitor the working temperature of this module; It is by gluing heat sink 8 the side surface of being connected on of ultra-violet curing.Metallic seal shell 10 can be kept laser cleaning, dry operational environment.
Among Fig. 1, sequence number 11 to 18 is the metal pins of this laser, is respectively pin 1 to 8, or pin P1 to P8.Wherein: by inner lead, pin 1,2 is connected respectively to pumping LD3 positive and negative electrode, is designated as LD+, LD-; Pin 3,4 is connected to TEC refrigerator 1 positive pole, is designated as TEC+; Pin 5,6 is connected to TEC refrigerator 1 negative pole, is designated as TEC-; Pin 7 is connected to thermistor 9 one ends, is designated as Rt1; Pin 8 is connected to thermistor 9 other ends, is designated as Rt2.
Two. the course of work of laser diode-pumped solid state laser
Below, from laserresonator and two parts of refrigeration control the course of work of this DPSSL module is carried out brief description.
1. laser resonance cavity segment:
1) outside LD driver is connected to pin 11,12, and it is luminous to set suitable current driving pumping LD3;
2) outside automated power is controlled the Output optical power linear voltage signal of (APC) module by monitoring splitter (Tap) and the acquisition in real time of PIN photodetector and 7.
3) the predefined normal voltage signal of the Output optical power signal conversion voltage of APC module competitive list mode fiber 7 and system is adjusted the drive current that circuit is adjusted the LD driver in real time by the outside: when detection signal during greater than setting signal, reduce drive current; Otherwise the increase drive current makes the Output optical power of monomode fiber 7 be stabilized in the power level of setting.
2. refrigeration control section:
1) outside TEC driver drives 1 work of TEC refrigerator by pin 3,4,5 and 6.
2) simultaneously, outside electric bridge testing circuit detects the resistance of thermistor 9 in real time by pin 7,8; When the resistance of thermistor 9 equaled the balance resistance, the representation module temperature just in time was on the default temperature.
3) if detected temperatures is higher than design temperature, outside TEC controller is by increasing the refrigerating capacity that drive current improves TEC refrigerator 1; Otherwise detected temperatures is lower than design temperature, and outside TEC controller is by increasing the refrigerating capacity that drive current improves the TEC refrigerator; This closed-loop control system can guarantee that DPSSL is operated under the suitable temperature, thereby obtains stable 1342nm laser output.
Claims (8)
1. laser diode-pumped solid state laser, it is characterized in that the pumping source of described solid state laser as other laser, output 1342nm laser, its structure is: in its metal shell (10), be provided with TEC refrigerator (1), pumping LD (3) and heat sink (2), set of lenses (4), Nd:YVO
4Laser crystal (5) and heat sink (8) thereof, chamber mirror (6), thermistor (9), two heat sink welderings by method for laser welding and TEC refrigerator (1) connect, and set of lenses (4) and chamber mirror (6) connect by method for laser welding and heat sink (8) weldering.
2. laser diode-pumped solid state laser according to claim 1 is characterized in that heat sink (8) made by the circulating type red copper, is divided into heat sink (8-1), (8-2) two parts, and they surround Nd:YVO
4Laser crystal (5) and with screw simultaneously, is equipped with the heat-conducting silicone grease coating on both contact-making surfaces.
3. laser diode-pumped solid state laser according to claim 1 is characterized in that set of lenses (4) is made of two mutually perpendicular cylindrical mirrors of main shaft (21), (22), and it firmly is connected with heat sink (8) by laser welding; The face of cylinder curvature of cylindrical mirror (21), (22) determines that by laser beam divergence its main shaft is respectively x, y direction, and parallel with the main shaft of pumping LD (3) output laser respectively.
4. laser diode-pumped solid state laser according to claim 1, the pumping source that it is characterized in that pumping LD (3) are 800～810nm wavelength LD.
5. laser diode-pumped solid state laser according to claim 1 is characterized in that at Nd:YVO
4The crystal incident end face of laser crystal (5) is that pumping laser injects end face and is coated with that 800～810nm is anti-reflection, the high reflective film of 1330～1350nm, it constitutes resonant cavity in conjunction with the output plane dichroscope, formation 1342nm is sharp to be penetrated, and is coupled into monomode fiber (7).
6. laser diode-pumped solid state laser according to claim 1 is characterized in that thermistor (9) is by the gluing side surface that is connected on heat sink (8) of ultra-violet curing.
7. laser diode-pumped solid state laser according to claim 1 is characterized in that chamber mirror (6) is a level crossing, is coated with 1342nm part transmission optics film, constitutes the Effect of Back-Cavity Mirror of laserresonator.
8. laser diode-pumped solid state laser according to claim 1, it is characterized in that laser diode-pumped solid state laser is provided with eight metal pins, it is respectively pin 1 to 8, wherein: pass through inner lead, pin 1,2 is connected respectively to pumping LD (3) positive and negative electrode, is designated as LD+, LD-; Pin 3,4 is connected to TEC refrigerator 1 positive pole, is designated as TEC+; Pin 5,6 is connected to TEC refrigerator 1 negative pole, is designated as TEC-; Pin 7 is connected to thermistor 9 one ends, is designated as Rt1; Pin 8 is connected to thermistor 9 other ends, is designated as Rt2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013012 CN1564389A (en) | 2004-04-12 | 2004-04-12 | Laser LED pump solid laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013012 CN1564389A (en) | 2004-04-12 | 2004-04-12 | Laser LED pump solid laser |
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| CN1564389A true CN1564389A (en) | 2005-01-12 |
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| CN 200410013012 Pending CN1564389A (en) | 2004-04-12 | 2004-04-12 | Laser LED pump solid laser |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570250A (en) * | 2011-04-06 | 2012-07-11 | 北京国科世纪激光技术有限公司 | Optical crystal heat radiation apparatus and optical crystal heat radiation system |
| CN101527424B (en) * | 2008-03-03 | 2012-08-08 | 北京中视中科光电技术有限公司 | Laser light source |
| CN102780151A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical-fiber coupled output end surface pumped solid-state laser and manufacture technology |
| CN102780150A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical fiber coupling output laser diode pump solid-state laser and manufacture process |
| CN102780149A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical-fiber side surface coupled laser diode pumped solid-state laser and manufacture technology |
| CN102810812A (en) * | 2012-07-25 | 2012-12-05 | 西安电子科技大学 | Fiber-coupled output Q-switched solid-state laser and manufacturing process |
| CN103199430A (en) * | 2013-03-20 | 2013-07-10 | 厦门大学 | Frequency doubling self-regulating Q green laser inside double-doped chrome yttrium aluminum garnet composite photassium titanyl phosphate cavity |
| CN103487902A (en) * | 2013-10-21 | 2014-01-01 | 武汉六九传感科技有限公司 | Optical fiber coupling packaging structure and packaging method for DFB (distributed feedback) semiconductor laser array chip |
| CN104028919A (en) * | 2013-03-06 | 2014-09-10 | 中国科学院理化技术研究所 | Welding system for on-line monitoring transmittance of laser crystal, and on-line monitoring method of welding system |
| CN104485573A (en) * | 2014-11-21 | 2015-04-01 | 湖北久之洋红外系统股份有限公司 | Laser diode array side pumping module |
| CN107910739A (en) * | 2017-12-22 | 2018-04-13 | 广东华快光子科技有限公司 | A kind of hundred picoseconds of microchip solid state lasers with temperature control device |
| CN108321666A (en) * | 2018-02-05 | 2018-07-24 | 中国科学院长春光学精密机械与物理研究所 | Infrared laser |
| CN109244808A (en) * | 2018-09-30 | 2019-01-18 | 沈阳理工大学 | A kind of Nd:YLF laser and its beamquality improvement method based on cylindrical mirror |
| CN109244805A (en) * | 2018-11-02 | 2019-01-18 | 中国科学院西安光学精密机械研究所 | A kind of phase transformation thermal control system and method for high-power laser diode pumping source array |
| CN112103757A (en) * | 2020-09-01 | 2020-12-18 | 西安电子科技大学 | Modularized heat management device for solid laser block material and control method thereof |
| CN114361916A (en) * | 2021-11-30 | 2022-04-15 | 中国电子科技集团公司第十一研究所 | Heat sink structural part for laser and laser with heat sink structural part |
| US11881676B2 (en) * | 2019-01-31 | 2024-01-23 | L3Harris Technologies, Inc. | End-pumped Q-switched laser |
-
2004
- 2004-04-12 CN CN 200410013012 patent/CN1564389A/en active Pending
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101527424B (en) * | 2008-03-03 | 2012-08-08 | 北京中视中科光电技术有限公司 | Laser light source |
| CN102570250A (en) * | 2011-04-06 | 2012-07-11 | 北京国科世纪激光技术有限公司 | Optical crystal heat radiation apparatus and optical crystal heat radiation system |
| CN102780151A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical-fiber coupled output end surface pumped solid-state laser and manufacture technology |
| CN102780150A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical fiber coupling output laser diode pump solid-state laser and manufacture process |
| CN102780149A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical-fiber side surface coupled laser diode pumped solid-state laser and manufacture technology |
| CN102810812A (en) * | 2012-07-25 | 2012-12-05 | 西安电子科技大学 | Fiber-coupled output Q-switched solid-state laser and manufacturing process |
| CN102810812B (en) * | 2012-07-25 | 2014-10-15 | 西安电子科技大学 | Fiber-coupled output Q-switched solid-state laser and manufacturing process |
| CN102780151B (en) * | 2012-07-25 | 2014-06-18 | 西安电子科技大学 | Optical-fiber coupled output end surface pumped solid-state laser and manufacture technology |
| CN102780149B (en) * | 2012-07-25 | 2014-08-13 | 西安电子科技大学 | Optical-fiber side surface coupled laser diode pumped solid-state laser and manufacture technology |
| CN102780150B (en) * | 2012-07-25 | 2014-08-13 | 西安电子科技大学 | Optical fiber coupling output laser diode pump solid-state laser and manufacture process |
| CN104028919A (en) * | 2013-03-06 | 2014-09-10 | 中国科学院理化技术研究所 | Welding system for on-line monitoring transmittance of laser crystal, and on-line monitoring method of welding system |
| CN103199430A (en) * | 2013-03-20 | 2013-07-10 | 厦门大学 | Frequency doubling self-regulating Q green laser inside double-doped chrome yttrium aluminum garnet composite photassium titanyl phosphate cavity |
| CN103487902A (en) * | 2013-10-21 | 2014-01-01 | 武汉六九传感科技有限公司 | Optical fiber coupling packaging structure and packaging method for DFB (distributed feedback) semiconductor laser array chip |
| CN103487902B (en) * | 2013-10-21 | 2015-06-17 | 武汉六九传感科技有限公司 | Optical fiber coupling packaging structure and packaging method for DFB (distributed feedback) semiconductor laser array chip |
| CN104485573A (en) * | 2014-11-21 | 2015-04-01 | 湖北久之洋红外系统股份有限公司 | Laser diode array side pumping module |
| CN104485573B (en) * | 2014-11-21 | 2017-09-22 | 湖北久之洋红外系统股份有限公司 | A kind of diode laser matrix side pumping module |
| CN107910739A (en) * | 2017-12-22 | 2018-04-13 | 广东华快光子科技有限公司 | A kind of hundred picoseconds of microchip solid state lasers with temperature control device |
| CN108321666A (en) * | 2018-02-05 | 2018-07-24 | 中国科学院长春光学精密机械与物理研究所 | Infrared laser |
| CN109244808A (en) * | 2018-09-30 | 2019-01-18 | 沈阳理工大学 | A kind of Nd:YLF laser and its beamquality improvement method based on cylindrical mirror |
| CN109244805A (en) * | 2018-11-02 | 2019-01-18 | 中国科学院西安光学精密机械研究所 | A kind of phase transformation thermal control system and method for high-power laser diode pumping source array |
| US11881676B2 (en) * | 2019-01-31 | 2024-01-23 | L3Harris Technologies, Inc. | End-pumped Q-switched laser |
| CN112103757A (en) * | 2020-09-01 | 2020-12-18 | 西安电子科技大学 | Modularized heat management device for solid laser block material and control method thereof |
| CN114361916A (en) * | 2021-11-30 | 2022-04-15 | 中国电子科技集团公司第十一研究所 | Heat sink structural part for laser and laser with heat sink structural part |
| CN114361916B (en) * | 2021-11-30 | 2023-12-26 | 中国电子科技集团公司第十一研究所 | Heat sink structural part for laser and laser with heat sink structural part |
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