摘要
报道了一种结构紧凑、高效率、高功率的2μm棒状Tm∶YAG激光器。通过优化设计三向激光二极管(LD)侧面泵浦激光模块,提高了晶体棒内泵浦光的功率密度。激光谐振腔采用平平腔结构,包含单个激光模块,几何腔长为88 mm,整台激光器结构简单、紧凑且体积小。激光模块通过一个水冷机进行冷却,在冷却温度为12℃条件下,获得了最高功率为119 W、波长为2.02μm的激光输出,光-光转换效率为19.6%,斜率效率达32.7%。该激光器可在最大输出功率下连续稳定运转2 h,功率波动小于1%,晶体端面及光学元件表面不结霜。实验测得x和y方向的光束质量因子分别为21.01和21.68。这种紧凑、可靠、高效的百瓦级2μm激光器对于医疗和科学研究等应用具有重要意义。
We report a compact,high-efficiency,and high-power 2μm rod-type Tm∶YAG laser.By optimizing the design of the threefold laser diode(LD)side-pumped laser module structure,the pump power density inside the crystal rod was increased.The laser resonator adopted a flat-flat cavity configuration,incorporating a single laser module,with a geometric cavity length of 88 mm and the complete laser structure was simple and compact with small footprint.The laser module was cooled by a water chiller,under a crystal cooling temperature of 12℃,we obtained a maximum output power of 119 W at a wavelength of 2.02μm,with an optical-to-optical efficiency of 19.6%and a slope efficiency of 32.7%.The laser can operate stably for 2 hours at maximum output power with power fluctuations below 1%,and no water condensation was observed on the crystal end faces and optical element surfaces.The mea⁃sured beam quality factors in the x and y directions were 21.01 and 21.68,respectively.This compact,reliable,and efficient hundred-watt level 2μm laser is of great significance for applications in medical and scientific research.
作者
吴健宏
杜仕峰
高昀
王海龙
陈玲芝
王志超
薄勇
崔大复
彭钦军
WU Jianhong;DU Shifeng;GAO Yun;WANG Hailong;CHEN Lingzhi;WANG Zhichao;BO Yong;CUI Dafu;PENG Qinjun(Key Laboratory of Solid State Laser,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Function Crystal and Laser Technology,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Optical Physics and Engineering Technology,Qilu Zhongke,Jinan 250000,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2023年第11期2027-2032,共6页
Chinese Journal of Luminescence
基金
国家高层次人才科技专项(SQ2022RA24910010)
中国科学院重点技术人才计划。
作者简介
吴健宏(1999-),男,山东潍坊人,硕士研究生,2021年于安徽大学获得学士学位,主要从事固体激光技术的研究。E-mail:wujianhong21@mails.ucas.ac.cn;杜仕峰(1979-),男,湖北利川人,博士,高级工程师,硕士生导师,2009年于中国科学院物理研究所获得博士学位,主要从事全固态激光及其变频激光技术的研究。E-mail:shifengdu@mail.ipc.ac.cn;王志超(1985-),男,四川资阳人,博士,高级工程师,2012年于中国科学院研究生院获得博士学位,主要从事全固态激光技术及其应用研究。E-mail:wangzhichao@mail.ipc.ac.cn。
