高峰值功率光纤脉冲激光系统  

High-Peak-Power Fiber Pulse Laser System

作　　者：向祥军 李剑彬 周丹丹[1] 张帆[1] 康民强[1] 邓颖[1,3] 粟敬钦[1,2] 郑奎兴[1] 朱启华[1,2,3] Xiang Xiangjun;Li Jianbin;Zhou Dandan;Zhang Fan;Kang Minqiang;Deng Ying;Su Jingqin;Zheng Kuixing;Zhu Qihua(Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China;Science and Technology on Plasma Physics Laboratory, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China;Collaborative Innovation Center of IFSA （CICIFSA） , Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]中国工程物理研究院等离子体物理重点实验室,四川绵阳621900 [3]IFSA协同创新中心上海交通大学,上海200240

出　　处：《中国激光》2018年第6期7-12,共6页Chinese Journal of Lasers

基　　金：中国工程物理研究院等离子体物理重点实验室基金(6142A04030403); 中国博士后科学基金(2017M623311XB)

摘　　要：报道了一种基于大模场光子晶体光纤放大的高峰值功率飞秒脉冲激光系统。该激光器系统采用光纤啁啾脉冲放大结构,种子源采用重复频率为40 MHz,脉冲宽度为500fs,输出功率为10mW的光纤激光器。利用体布拉格光栅(VBG)将脉冲展宽至500ps,经过多级放大并利用声光调制器降频为500kHz,然后采用大模场纤芯直径为40μm和85μm光子晶体光纤作为功率放大器,最后采用VBG压缩脉宽至767fs,得到平均功率为104 W的激光输出,其中心波长为1030nm,实现了峰值功率为0.271GW的近衍射极限激光功率输出。An ultrashort pulse laser system based on ultra-large-mode-field fiber amplification is reported.The laser system adopts fiber chirped pulse amplification amplification structure.The pulses with 500 fs are stretched to500 ps by volume Bragg grating（VBG）.The seed laser with average output power of 10 mW and repetition of40 MHz is amplified by Yb-doped fiber amplifier.The repetition is adjusted to 500 kHz through the acousto-optic modulator.Then we use the large-mode field core diameters of 40μm and 85μm photonic crystal fibers as power amplifiers.Finally the laser with center wavelength of 1030 nm is compressed by VBG.The average output power is104 W,and the near-diffraction-limit 767 fs pulse with maximum peak power of 0.271 GW is achieved.

关 键 词：激光器 光纤放大器 高峰值功率 啁啾脉冲放大 超短脉冲 

分 类 号：O436[机械工程—光学工程]