高功率直接液冷固体薄片激光器的设计与实验
|
摘要
设计了一种新型高功率直接液冷固体薄片激光器,由数十至数百片透射薄片密集堆叠构成分布式增益系统,使特种激光冷却液在增益介质间的平板微流道内流动以实现薄片直接冷却,有效解决了传统高功率固体激光器中增益介质焊接于热沉引入的热致应力、焊接面变形等问题。对该激光器的腔内损耗、腔内像差等参数进行了优化设计。分析了影响光-光转换效率的关键因素,根据像差特点给出了光束质量控制方法。将20片薄片以特别角度密集堆叠构成增益模块,利用两个增益模块在稳腔和非稳腔中均实现了功率大于9kW的准连续波(QCW)偏振激光输出,且这一实验室光源的体积小于0.4m3。
A novel high-power direct-liquid-cooled thin-disk solid-state laser is designed,in which the distributed gain system is composed of tens or hundreds transmission disks by intensive stacking.A special kind of laser cooling liquid flows in the planar micro-channels between gain media,and thus the direct cooling of disks is realized.The thermal stress,the reflective surface deformation and so on caused by the soldering between gain media and the heatsink in the traditional high power solid-state laser are successfully avoided.In addition,the parameters such as intracavity loss and aberration are optimized.The key factors influencing the optical-to-optical conversion efficiency are analyzed,and the methods for controlling laser beam quality are introduced according to the thermal aberration characteristics.A gain module is composed of 20 disks by intensive stacking with a special angle.With these gain modules,aquasi-continuous-wave(QCW)polarized laser with an output power of larger than 9kW is obtained in both stable and unstable cavities.Moreover,the whole volume of this laser source in laboratory is smaller than 0.4m3.
A novel high-power direct-liquid-cooled thin-disk solid-state laser is designed,in which the distributed gain system is composed of tens or hundreds transmission disks by intensive stacking.A special kind of laser cooling liquid flows in the planar micro-channels between gain media,and thus the direct cooling of disks is realized.The thermal stress,the reflective surface deformation and so on caused by the soldering between gain media and the heatsink in the traditional high power solid-state laser are successfully avoided.In addition,the parameters such as intracavity loss and aberration are optimized.The key factors influencing the optical-to-optical conversion efficiency are analyzed,and the methods for controlling laser beam quality are introduced according to the thermal aberration characteristics.A gain module is composed of 20 disks by intensive stacking with a special angle.With these gain modules,aquasi-continuous-wave(QCW)polarized laser with an output power of larger than 9kW is obtained in both stable and unstable cavities.Moreover,the whole volume of this laser source in laboratory is smaller than 0.4m3.
引文
[1]Zhou S H,Zhao H,Tang X J.High average power laser diode pumped solid-state laser[J].Chinese Journal of Lasers,2009,36(7):1605-1618.周寿桓,赵鸿,唐小军.高平均功率全固态激光器[J].中国激光,2009,36(7):1605-1618.
[2]Kuhn V,Gottwald T,Stolzenburg C,et al.Latest advances in high brightness disk lasers[J].Proceedings of SPIE,2015,9342:93420Y.
[3]Li J M.Development,trend and application of high average power diode pumped lasers[J].Laser&Optoelectronics Progress,2008,45(7):16-29.李晋闽.高平均功率全固态激光器发展现状、趋势及应用[J].激光与光电子学进展,2008,45(7):16-29.
[4]Tang C.Review on high brightness high average power solid-state laser technology[J].Chinese Journal of Quantum Electronics,2005,22(4):488-496.唐淳.高亮度高平均功率固体激光器技术评述[J].量子电子学报,2005,22(4):488-496.
[5]Chen J B,Guo S F.Review on technical approaches of high energy solid-state lasers[J].Chinese Journal of Lasers,2013,40(6):0602006.陈金宝,郭少锋.高能固态激光器技术路线分析[J].中国激光,2013,40(6):0602006.
[6]Ren G G,Huang Y N.Diode pumped solid-state laser stride forward 100kW[J].Laser&Infrared,2006,36(8):617-622.任国光,黄裕年.二极管抽运固体激光器迈向100kW[J].激光与红外,2006,36(8):617-622.
[7]Avizonis P V,Bossert D J,Curtin M S.Physics of high performance Yb:YAG thin disk lasers[C].Conference on Lasers and Electro-Optics and Quantum electronics and Laser Science,2009:CThA2.
[8]Mandl A,Klimek D E.Textron′s J-HPSSL 100kWThinZaglaser program[C].Conference on Laser Science to Photonic Applications,2010:JThH2.
[9]Giesen A,Speiser J.Fifteen years of work on thindisk lasers:results and scaling laws[J].IEEEJournal of Selected Topics in Quantum Electronics,2007,13(3):598-609.
[10]An X C,Tang C,Shang J L,et al.10Jdiodepumped thin-disk laser in unstable resonator[J].Chinese Journal of Lasers,2014,41(8):0802001.安向超,唐淳,尚建力,等.10J级二极管抽运非稳腔薄片激光器[J].中国激光,2014,41(8):0802001.
[11]Cai Z,Wang X J,Jiang J F,et al.Study of uniform pumping and uniform cooling on thin disk laser[J].Chinese Journal of Lasers,2010,37(10):2437-2440.蔡震,王小军,蒋建锋,等.薄片激光器均匀抽运及均匀冷却技术研究[J].中国激光,2010,37(10):2437-2440.
[12]General Atomics and Affiliated Companies.Hellads laser completes development[EB/OL].[2018-08-21].http://www.ga.com/hellads-laser-completesdevelopment.
[13]Shang J L,Yu Y,An X C,et al.Influence and compensation of intra-cavity defocusing in unstable resonator Nd:YAG thin-disk laser[J].Chinese Journal of Lasers,2015,42(1):0102005.尚建力,于益,安向超,等.非稳腔Nd:YAG薄片激光器腔内离焦的影响和补偿[J].中国激光,2015,42(1):0102005.
[14]Cai H D,Shang J L,Su H,et al.Research of nonconjugated aberration compensation in passive unstable resonator[J].Chinese Journal of Lasers,2015,42(11):1102005.蔡海动,尚建力,苏华,等.无源非稳腔内非共轭像差补偿研究[J].中国激光,2015,42(11):1102005.
[15]Su H.Study on coupling dynamics in high-power solid state lasers with unstable cavity[D].Beijing:China Academy of Engineering Physics,2015.苏华.非稳腔式高能固体激光器中的耦合动力学研究[D].北京:中国工程物理研究院,2015.
[16]Wang K,Tu B,Shang J L,et al.Kilowatt-level immersed and direct-liquid-cooling Nd:YAG multidisk laser resonator[J].Chinese Journal of Lasers,2017,44(8):0801002.王柯,涂波,尚建力,等.千瓦级浸入式直接液冷Nd:YAG多薄片激光谐振腔[J].中国激光,2017,44(8):0801002.
[2]Kuhn V,Gottwald T,Stolzenburg C,et al.Latest advances in high brightness disk lasers[J].Proceedings of SPIE,2015,9342:93420Y.
[3]Li J M.Development,trend and application of high average power diode pumped lasers[J].Laser&Optoelectronics Progress,2008,45(7):16-29.李晋闽.高平均功率全固态激光器发展现状、趋势及应用[J].激光与光电子学进展,2008,45(7):16-29.
[4]Tang C.Review on high brightness high average power solid-state laser technology[J].Chinese Journal of Quantum Electronics,2005,22(4):488-496.唐淳.高亮度高平均功率固体激光器技术评述[J].量子电子学报,2005,22(4):488-496.
[5]Chen J B,Guo S F.Review on technical approaches of high energy solid-state lasers[J].Chinese Journal of Lasers,2013,40(6):0602006.陈金宝,郭少锋.高能固态激光器技术路线分析[J].中国激光,2013,40(6):0602006.
[6]Ren G G,Huang Y N.Diode pumped solid-state laser stride forward 100kW[J].Laser&Infrared,2006,36(8):617-622.任国光,黄裕年.二极管抽运固体激光器迈向100kW[J].激光与红外,2006,36(8):617-622.
[7]Avizonis P V,Bossert D J,Curtin M S.Physics of high performance Yb:YAG thin disk lasers[C].Conference on Lasers and Electro-Optics and Quantum electronics and Laser Science,2009:CThA2.
[8]Mandl A,Klimek D E.Textron′s J-HPSSL 100kWThinZaglaser program[C].Conference on Laser Science to Photonic Applications,2010:JThH2.
[9]Giesen A,Speiser J.Fifteen years of work on thindisk lasers:results and scaling laws[J].IEEEJournal of Selected Topics in Quantum Electronics,2007,13(3):598-609.
[10]An X C,Tang C,Shang J L,et al.10Jdiodepumped thin-disk laser in unstable resonator[J].Chinese Journal of Lasers,2014,41(8):0802001.安向超,唐淳,尚建力,等.10J级二极管抽运非稳腔薄片激光器[J].中国激光,2014,41(8):0802001.
[11]Cai Z,Wang X J,Jiang J F,et al.Study of uniform pumping and uniform cooling on thin disk laser[J].Chinese Journal of Lasers,2010,37(10):2437-2440.蔡震,王小军,蒋建锋,等.薄片激光器均匀抽运及均匀冷却技术研究[J].中国激光,2010,37(10):2437-2440.
[12]General Atomics and Affiliated Companies.Hellads laser completes development[EB/OL].[2018-08-21].http://www.ga.com/hellads-laser-completesdevelopment.
[13]Shang J L,Yu Y,An X C,et al.Influence and compensation of intra-cavity defocusing in unstable resonator Nd:YAG thin-disk laser[J].Chinese Journal of Lasers,2015,42(1):0102005.尚建力,于益,安向超,等.非稳腔Nd:YAG薄片激光器腔内离焦的影响和补偿[J].中国激光,2015,42(1):0102005.
[14]Cai H D,Shang J L,Su H,et al.Research of nonconjugated aberration compensation in passive unstable resonator[J].Chinese Journal of Lasers,2015,42(11):1102005.蔡海动,尚建力,苏华,等.无源非稳腔内非共轭像差补偿研究[J].中国激光,2015,42(11):1102005.
[15]Su H.Study on coupling dynamics in high-power solid state lasers with unstable cavity[D].Beijing:China Academy of Engineering Physics,2015.苏华.非稳腔式高能固体激光器中的耦合动力学研究[D].北京:中国工程物理研究院,2015.
[16]Wang K,Tu B,Shang J L,et al.Kilowatt-level immersed and direct-liquid-cooling Nd:YAG multidisk laser resonator[J].Chinese Journal of Lasers,2017,44(8):0801002.王柯,涂波,尚建力,等.千瓦级浸入式直接液冷Nd:YAG多薄片激光谐振腔[J].中国激光,2017,44(8):0801002.