Spectrum-tailored random fiber laser towards ICF laser facility  

作　　者：Mengqiu Fan Shengtao Lin Ke Yao Yifei Qi Jiaojiao Zhang Junwen Zheng Pan Wang Longqun Ni Xingyu Bao Dandan Zhou Bo Zhang Kaibo Xiao Handing Xia Rui Zhang Ping Li Wanguo Zheng Zinan Wang 

机构地区：[1]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China [2]Graduate School of China Academy of Engineering Physics,Beijing 100193,China [3]Key Laboratory of Optical Fiber Sensing and Communications,University of Electronic Science and Technology of China,Chengdu 611731,China

出　　处：《Matter and Radiation at Extremes》2023年第2期47-55,共9页极端条件下的物质与辐射（英文）

基　　金：support of the National Natural Science Foundation of China(Grant Nos.62075030,62075201,and 11904339);the Sichuan Provincial Project for Outstanding Young Scholars in Science and Technology(Grant No.2020JDJQ0024)。

摘　　要：Broadband low-coherence light is considered to be an effective way to suppress laser plasma instability.Recent studies have demonstrated the ability of low-coherence laser facilities to reduce back-scattering during beam–target coupling.However,to ensure simultaneous low coherence and high energy,complex spectral modulation methods and amplification routes have to be adopted.In this work,we propose the use of a random fiber laser(RFL)as the seed source.The spectral features of this RFL can be carefully tailored to provide a good match with the gain characteristics of the laser amplification medium,thus enabling efficient amplification while maintaining low coherence.First,a theoretical model is constructed to give a comprehensive description of the output characteristics of the spectrum-tailored RFL,after which the designed RFL is experimentally realized as a seed source.Through precise pulse shaping and efficient regenerative amplification,a shaped random laser pulse output of 28 mJ is obtained,which is the first random laser system with megawatt-class peak power that is able to achieve low coherence and efficient spectrum-conformal regenerative amplification.

关 键 词：fiber SCATTERING RANDOM 

分 类 号：TN249[电子电信—物理电子学]