长脉宽大能量Yb∶YAG平面波导激光放大器  

Long Pulse Laser Amplification of Yb∶YAG Planar Waveguide with High Energy

作　　者：刘东升 王金川 徐浏[1,2] 杜佳林 何平 谭亮[1,2] 王亚楠 汪丹 王君涛[1,2] 周唐建[1,2] 尚建力[1,2] 高清松[1,2] Liu Dongsheng;Wang Jinchuan;Xu Liu;Du Jialin;He Ping;Tan Liang;Wang Yanan;Wang Dan;Wang Juntao;Zhou Tangjian;Shang Jianli;Gao Qingsong(Institute of Applied Electronics China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;Key Laboratory of Science and Technology on High Energy Laser China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;Graduate School China Academy of Engineering Physics,Beijing 100088,China)

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳612900 [2]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳621900 [3]中国工程物理研究院研究生院,北京100088

出　　处：《中国激光》2021年第16期35-42,共8页Chinese Journal of Lasers

基　　金：中物院创新发展基金创新项目(C-2021-CX20200030)。

摘　　要：搭建了1030 nm波长的准连续长脉宽室温Yb∶YAG平面波导激光放大器,分析对比注入光强、抽运光强和抽运脉宽等因素对光-光转换效率的影响。采用主振荡功率放大结构,种子源为1030 nm连续保偏光纤激光器。放大器增益介质为一块Yb∶YAG平面波导,抽运源为两个准连续940 nm半导体激光阵列,抽运光经整形后分别从两个端面耦合进入平面波导。在双端抽运下,抽运重复频率为400 Hz和最大峰值功率为20.4 kW时获得了最大能量为4.65 J的激光放大输出,偏振度为97%,光-光转换效率为44.0%,与理论分析基本吻合。Objective Diode-pumped solid-state laser(DPSSL)has a large energy compact structure,high efficiency,and good stability,which possesses outstanding application value and prospects in scientific research,military,industrial processing,and other fields.DPSSL has achieved rapid development in the past 10 years.The efficiency of high average-power solid-state laser has been the development direction of solid-state lasers.The planar waveguide gain medium can satisfy the high injected laser and high pump laser intensities.Thus,the planar waveguide laser is one of the potential laser technologies for obtaining high optical-optical efficiency and high average-power output.In this study,aquasi-continuous long pulse width Yb∶YAG planar waveguide laser amplifier at room temperature with a wavelength of 1030 nm was constructed and the factors affecting the optical-optical conversion efficiency were analyzed.We hope that this study will help improve the optical-optical conversion efficiency of high-power solidstate lasers.Methods The experiment is based on a planar waveguide gain medium.First,the theoretical model of laser dynamics based on Yb∶YAG was developed.The effects of the injected laser intensity,pump laser intensity,and pump pulse width on the optical-optical conversion efficiency were analyzed through computer simulation.Then,a quasi-continuous long pulse width Yb∶YAG planar waveguide laser amplifier at room temperature with a wavelength of 1030 nm was constructed.Next,the output energy of the amplifier was tested to verify the correctness of the theoretical model.The laser amplifier was operated at different pulse repetition frequencies.In addition,the beam quality of the output laser was measured using a beam quality analyzer,and spectra of the output laser were analyzed using a spectrograph.Results and Discussions The simulation results show that the higher the seed laser power,the earlier it enters the steady-state extraction.The higher the injected laser intensity,the higher the optical efficiency of the s

关 键 词：激光器 激光放大器 1030 nm 平面波导 Yb∶YAG 

分 类 号：TN248[电子电信—物理电子学]