高功率光纤飞秒激光放大器的研究现状与发展趋势  

Research Status and Development Trend of High Power Femtosecond Fiber Laser Amplifiers

作　　者：闫东钰 刘博文 宋寰宇 李源 储玉喜 柴路 胡明列 王清月 Yan Dongyu;Liu Bowen;Song Huanyu;Li Yuan;Chu Yuxi;Chai Lu;Hu Minglie;Wang Chingyue(Ultrafast Laser Laboratory & Key Laboratory o f Optoelectronic Information Technology (Ministry of Education ),School of Precision Instrument and Optoelectronics Engineering , Tianjin University , Tianjin 300072, China)

机构地区：[1]天津大学精密仪器与光电子工程学院超快激光研究室&光电信息技术教育部重点实验室

出　　处：《中国激光》2019年第5期136-161,共26页Chinese Journal of Lasers

基　　金：国家自然科学基金(11527808,U1730115,61535009);强场激光物理国家重点实验室开放基金

摘　　要：针对高功率光纤飞秒激光放大器,介绍了啁啾脉冲放大(CPA)技术的基本原理,讨论了该结构中关键的展宽器和压缩器的发展现状与瓶颈;介绍了典型的大模场面积光纤的结构和工作原理,简介了基于大模场面积光纤的CPA系统的发展现状;介绍了非线性放大技术,讨论了实现更窄脉冲宽度、更高脉冲质量的光纤飞秒激光放大方案;最后分析了全光纤结构、相干合束、单晶光纤增益介质以及皮秒种子源等新型技术,并总结了高功率光纤飞秒激光放大器的发展趋势。This article introduces the basic principle of chirped pulse amplification(CPA) for high-power femtosecond fiber laser amplifiers, along with a discussion of the development status and bottlenecks of the key stretchers and compressors in the CPA structure. It provides a description of the structure and working principle of a typical large-mode-area fiber, and briefly discusses the development status of the corresponding CPA system based on this kind of fiber. Further, it introduces the nonlinear amplification technologies, and discusses an amplification scheme for narrower pulse duration and higher pulse quality. Finally, it presents an analysis of advanced technologies such as an all-fiber structure, coherent beam combination, single-crystal fibers as active elements, and picosecond seed sources, and provides a summary of the development trend of high-power femtosecond fiber laser amplifiers.

关 键 词：飞秒激光 光纤放大器 啁啾脉冲放大(CPA) 非线性放大 脉冲相干合束 

分 类 号：O436[机械工程—光学工程]