1.8 mJ高倍率Nd:YAG板条皮秒激光放大器  

1.8 mJ high magnification Nd:YAG slab picosecond laser amplifier

作　　者：王金川 李密[1,2] 杜佳林 汪丹[1,2] 李腾龙[1,2] 王君涛[1,2] 周唐建[1,2] 尚建力[1,2] 高清松[1,2] Wang Jinchuan;Li Mi;Du Jialin;Wang Dan;Li Tenglong;Wang Juntao;Zhou Tangjian;Shang Jianli;Gao Qingsong(Institute of Applied Electronics,CAEP,Mianyang 612900,China;Key Laboratory of Science and Technology on High Energy Laser,CAEP,Mianyang 612900,China;Graduate School of China Academy of Engineering Physics,Beijing 100088,China)

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳612900 [2]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳612900 [3]中国工程物理研究院研究生院,北京100088

出　　处：《强激光与粒子束》2022年第6期1-7,共7页High Power Laser and Particle Beams

基　　金：中国工程物理研究院创新发展基金项目(C-2021-CX20200030)。

摘　　要：设计了一种高倍率的固体皮秒脉冲激光放大器,采用Nd:YAG板条作为激光增益介质。借助板条结构的角度选通结构,搭建了板条五通放大系统,实现了对注入皮秒脉冲激光的高倍率放大。种子源工作在脉冲模式,放大器泵浦源在连续模式工作。皮秒光纤激光器可以在不同的重复频率下工作,脉冲宽度为13.4 ps。种子光经过隔离和耦合系统之后,注入板条的单脉冲能量为25 nJ。当种子源工作重复频率为24.46 MHz时,板条放大器输出平均功率377 W,单脉冲能量15.5μJ;当种子源工作重复频率为49.8 kHz时,板条放大器输出平均功率89 W,单脉冲能量1.8 mJ,峰值功率为134 MW,放大倍率达到7.2×10^(4)。In this study,we design a high-magnification solid-state picosecond pulse laser amplifier in which the gain medium is Nd:YAG slab.We achieve the five-pass amplification of the picosecond pulse laser through the slab multi-angle magnification technology.The seed source works in pulse mode,and the amplifier pump works in continuous mode.Picosecond fiber laser can work at different repetition rates with 13.4 ps pulse duration.After the seed laser passes through the isolation and coupling system,the single-pulse energy injected into the slab is 25 nJ.When repetition frequency of the seed source is 24.46 MHz,the output power is 377 W,the single-pulse energy is 15.5μJ.When repetition frequency of the seed source is 49.8 kHz,a laser output power of 89 W is obtained with single-pulse energy 1.8 mJ and peak power 134 MW.The magnification is up to 7.2×10^(4).

关 键 词：激光器 皮秒激光 固体激光器 高倍率 五通放大 

分 类 号：TN248.1[电子电信—物理电子学]