二极管泵浦重复频率纳秒高能固体激光器研究进展  

High Energy Diode-Pumped Rep-Rated Nanosecond Solid-State Laser

作　　者：付星 刘廷昊 雷新星 巩马理[1,2] 柳强 Fu Xing;Liu Tinghao;Lei Xinxing;Gong Mali;Liu Qiang(Department of Precision Instrument,Tsinghua University,Beijing 100084,China;Key Laboratory of Photonic Control Technology(Tsinghua University),Ministry of Education,Beijing 100084,China)

机构地区：[1]清华大学精密仪器系,北京100084 [2]光子测控技术教育部重点实验室,北京100084

出　　处：《中国激光》2021年第15期39-59,共21页Chinese Journal of Lasers

基　　金：国家万人计划青年拔尖人才支持计划;中国科协青年人才托举工程;北京市优秀人才培养资助(2017000020124G044);中国兵器工业集团有限公司激光器件技术重点实验室开放基金资助。

摘　　要：二极管泵浦重复频率纳秒高能固体激光器(主要指单脉冲能量10 J以上,脉冲重复频率10 Hz以上)在重大基础和应用研究领域中发挥了重要的作用,是科学研究的前沿热点之一。本文以叠片、激活镜、之字形板条三种放大构型为线索,详细介绍了二极管泵浦重复频率纳秒高能固体激光器的代表性成果和研究进展,分析了激光器的优选技术路线,并对未来的发展前景进行了展望。Significance High-energy rep-rated nanosecond diode-pumped solid-state lasers(DPSSLs),mainly referring to nanosecond lasers with pulse energies greater than 10 Jand repetition rates greater than 10 Hz,are crucial in major fundamental and applied research domains and are emerging as one of the hot topics at the frontier of scientific research.This study first analyzes the preferred technical paths of high-energy rep-rated nanosecond DPSSLs in terms of the gain medium and amplifier geometry and then reviews the representative achievements and research progress of high-energy rep-rated nanosecond DPSSLs in detail.Furthermore,the prospects of future development of DPSSLs are discussed herein.Progress Favored for its moderate saturation fluence and high thermal conductivity,Yb∶YAG at the cryogenic temperature and Nd∶LuAG at room temperature have been proven to be the most promising gain media in achieving rep-rated nanosecond DPSSLs with even higher energy.Conversely,gain medium with high saturation fluence at room temperature,such as Yb∶YAG,and that with low saturation fluence,such as Nd∶YAG,is not suitable for high energy lasers primarily owing to the defect of high pump threshold from the quasi-three-level structure and high passive loss from too many stages.In addition,the three preferred amplifier geometries are the multislab,active mirror,and zigzag slab(Fig.1),as categorized by the representative achievements of high energy rep-rated nanosecond DPSSLs summarized in Table 2.For the multislab geometry,the Mercury system developed by Lawrence Livermore National Laboratory(LLNL)produced a nanosecond output with the pulse energy of 61 Jat the repetition rate of 10 Hz based on Yb∶S-FAP multislabs,with ultralow wavefront aberration using a new high-speed gas cooling technology at room temperature(Fig.2),a classical approach that was then widely used.Using similar gas cooling technology but operating at cryogenic temperature,the DiPOLE system based on Yb∶YAG ceramic achieved 105 J,10 Hz,and 10 ns in 2017,wh

关 键 词：激光器 固体激光 二极管泵浦 高能激光 重复频率纳秒激光 

分 类 号：O436[机械工程—光学工程]