高重复频率光参量啁啾脉冲放大器研究进展  

High Repetition-Rate Optical Parametric Chirped-Pulse Amplifiers

作　　者：商景诚 刘一州 赵圣之[1,2] 冯天利 杨克建[1,3,4] 乔文超 赵元涛[1,2,3] 李涛 Shang Jingcheng;Liu Yizhou;Zhao Shengzhi;Feng Tianli;Yang Kejian;Qiao Wenchao;Zhao Yuantao;Li Tao(School of Information Science and Engineering,Shandong University,Qingdao,Shandong 266237,China;Shandong Key Laboratory for Laser Technologies and Applications,Shandong University,Qingdao,Shandong 266237,China;Key Laboratory of Laser&Infrared System,Ministry of Education,Shandong University,Qingdao,Shandong 266237,China;Institute of Crystal Materials,Shandong University,Jinan,Shandong 250100,China)

机构地区：[1]山东大学信息科学与工程学院,山东青岛266237 [2]山东大学山东省激光技术与应用重点实验室,山东青岛266237 [3]山东大学激光与红外系统集成技术教育部重点实验室,山东青岛266237 [4]山东大学晶体材料研究所,山东济南250100

出　　处：《中国激光》2021年第12期52-67,共16页Chinese Journal of Lasers

基　　金：国家重点研发开发项目(2016YFB1102201);国家自然科学基金(62005144,61775119);山东省自然科学基金(ZR2020QF096,ZR2018MF033);山东省泰山学者基金(tsqn201812010);山东大学齐鲁青年项目。

摘　　要：光参量啁啾脉冲放大器(OPCPA)在实现高功率、大能量、光学周期量级的超短激光脉冲输出方面极具优势。对具有高脉冲重复频率(≥1 kHz)的OPCPA系统展开研究讨论,全面介绍OPCPA系统的组成;针对不同波段的OPCPA系统,对泵浦源、前端、光参量放大级和压缩器等关键模块分别进行对比和讨论,对限制OPCPA系统性能提升的因素进行分析;最后总结不同输出波长的高重复频率OPCPA系统的研究现状,并对未来的发展方向进行展望。Significance Optical parametric chirped-pulse amplifier(OPCPA),which relies on the optical parametric process existing in nonlinear crystals to realize pulse amplification,can further enhance a yielded peak power by avoiding the gain narrowing and thermal effects that usually exist in a chirped-pulse amplifier.The generated ultrashort pulse with high peak power from OPCPA can considerably extend the ultrafast pulse to X-ray and infrared regimes,thereby bringing a new revolution to ultrafast science.OPCPA system pumped ultrafast X-ray desktop light source has potential applications in medicine,biology,and materials science.In this article,we review the development of OPCPA systems,including its main characteristics and research progresses in different wavelength regimes(~0.8,~1.5,~2,~3,and>4μm).Progress In~0.8-μm OPCPA systems,the pumping laser pulse(0.515μm)is usually generated via the second harmonic generation process from a Yb-doped laser amplifier.The seed pulses can be generated using a modelocking few-cycle Ti:Sapphire oscillator directly or via the supercontinuum generation process.The energy/power of seed pulses is usually scaled up inside the BBO nonlinear crystals.The dispersion compensation for the amplified seed pulses is realized by the chirped mirror or glass block.Currently,the highest pulse repetition rate of11.5 MHz,shortest pulse duration of 5 fs,maximum average output power of 112 W,largest pulse energy of 54 mJ,and highest peak power of 5.5 TW have been realized in the~0.8-μm OPCPA systems(Fig.6).In~1.5-μm OPCPA systems,the pumping source is a Ti:Sapphire laser amplifier or Yb-doped laser amplifier.The seed pulses are generated via the supercontinuum generation process in noble gas or transparent medium,which is stimulated by the Ti:Sapphire laser oscillator and Er-or Yb-doped fiber/solid-state laser oscillators.Different crystals,such as BIBO,DSTMS(organic crystal),KTA,and LBO,have been employed to amplify the seed pulses.The dispersion of the amplified seed pulses is compensated by the

关 键 词：激光技术 光参量啁啾脉冲放大器 超快激光 高功率 高重复频率 光学周期 

分 类 号：O436[机械工程—光学工程]