High-repetition-rate and high-power efficient picosecond thin-disk regenerative amplifier  

作　　者：Sizhi Xu Yubo Gao Xing Liu Yewang Chen Deqin Ouyang Junqing Zhao Minqiu Liu Xu Wu Chunyu Guo Cangtao Zhou Qitao Lue Shuangchen Ruan 

机构地区：[1]Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes,Sino-German College of Intelligent Manufacturing,Shenzhen Technology University,Shenzhen,China [2]Han’s Laser Technology Industry Group Co.,Ltd.,Shenzhen,China [3]Shenzhen Key Laboratory of Laser Engineering,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,China [4]Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology,College of Engineering Physics,Shenzhen Technology University,Shenzhen,China

出　　处：《High Power Laser Science and Engineering》2024年第2期16-23,共8页高功率激光科学与工程（英文版）

基　　金：This work was supported by the National Key Research and Development Program of China(2022YFB3605800);National Natural Science Foundation of China(62275174,62105225,61975136,61935014);Shenzhen University Stability Support Project(20220719104008001);Natural Science Foundation of Top Talent of Shenzhen Technology University(GDRC202106);Pingshan Special Funds for Scientific and Technological Innovation(PSKG202003,PSKG202007);Special Project of Self-made Experimental Instruments and Equipment of Shenzhen Technology University(JSZZ202201014).

摘　　要：We present an effective approach to realize a highly efficient,high-power and chirped pulse amplification-free ultrafast ytterbium-doped yttrium aluminum garnet thin-disk regenerative amplifier pumped by a zero-phonon line 969 nm laser diode.The amplifier delivers an output power exceeding 154 W at a pulse repetition rate of 1 MHz with custom-designed 48 pump passes.The exceptional thermal management on the thin disk through high-quality bonding,efficient heat dissipation and a fully locked spectrum collectively contributes to achieving a remarkable optical-to-optical efficiency of 61%and a near-diffraction-limit beam quality with an M2 factor of 1.06.To the best of our knowledge,this represents the highest conversion efficiency reported in ultrafast thin-disk regenerative amplifiers.Furthermore,the amplifier operates at room temperature and exhibits exceptional stability,with root mean square stability of less than 0.33%.This study significantly represents advances in the field of laser amplification systems,particularly in terms of efficiency and average power.This advantageous combination of high efficiency and diffraction limitation positions the thin-disk regenerative amplifier as a promising solution for a wide range of scientific and industrial applications.

关 键 词：high efficiency high power picosecond laser regenerative amplifier thin-disk laser 

分 类 号：TN248[电子电信—物理电子学] TN722