基于Yb∶YGG晶体的桌面级20 TW光学方案模拟  

Optical Scheme Simulation of Table-Top 20 TW Laser Based on Yb∶YGG

作　　者：刘金升 管相合 季来林[1] 王韬[1] 张发旺 刘佳 隋展 崔勇[1] 赵晓晖 高妍琦[1] Liu Jinsheng;Guan Xianghe;Ji Lailin;Wang Tao;Zhang Fawang;Liu Jia;Sui Zhan;Cui Yong;Zhao Xiaohui;Gao Yanqi(Shanghai Institute of Laser and Plasma,China Academy of Engineering Physics,Shanghai 201800,China)

机构地区：[1]中国工程物理研究院上海激光等离子体研究所,上海201800

出　　处：《光学学报》2024年第20期187-194,共8页Acta Optica Sinica

基　　金：中国工程物理研究院院长基金自立项目(YZJJZL2024200);国家自然科学基金(62405298,12074353);国家重点研发计划(2023YFA1608503)。

摘　　要：桌面级高重复频率大能量皮秒激光器可用于产生X射线等,更便捷高效地研究等离子体中的超快动力学过程以及高能量密度物理等现象。利用Yb∶Y_(3)Ga_(5)O_(12)(Yb∶YGG)晶体作为放大介质,采用空间位移-角度编码方式的多程复用放大器,在室温条件下实现了亚皮秒量级、峰值功率约为20 TW的红外激光输出。本方案为数十TW皮秒高能激光器研制提供了新的思路。Objective The most widely employed gain medium based on Yb3+is Yb∶YAG.There are primarily two approaches for developing tabletop highpower pulse lasers based on Yb∶YAG high repetition frequency with low pulse energy(repetition rate>1 kHz)scheme and low repetition frequency with high energy(single pulse energy>5 J)scheme.Based on the former scheme,reported by Colorado State University,the average power was currently scaled up to 1100 W with a pulse of 1.1 J/4.5 ps/1 kHz.The maximum peak power,achieved by TRUMPF Scientific Lasers GmbH in Germany,was 0.78 TW with a pulse of 0.72 J/0.92 ps/1 kHz.The mode with a high repetition rate and low pulse energy generally adopts a thindisk gain medium,which has a large body surface ratio.Limited by the system scale and thermal effect,the average power is difficult to be further improved.Based on the latter scheme,the maximum single pulse energy was created by the Petawatt‒Field‒Synthesizer(PFS)system with an output of 8.6 J/0.8 ps/10 Hz.Under the limitation of scale and thermal management,it is difficult to further increase the single pulse energy and average power.Therefore,in recent years,the DiPOLE device of Rutherford Appleton Laboratory,STFC,UK,as a representative has been successfully developed based on the lowtemperature gascooled laminated Yb∶YAG amplifier configuration.However,the scale is huge,mainly for laser fusion related applications with limited applicability.To generate radiation sources such as Xrays,and efficiently study the phenomena of ultrafast dynamics and highenergy density physics in plasma,we develop tabletop,high repetition frequency,and highenergy picosecond lasers.Methods In response to the requirements of a tabletop,high repetition frequency,and highenergy subpicosecond laser system,we propose a novel amplification configuration based on spatial displacement‒angle encoding.It has the potential to achieve an output of 20 J/1 ps/10 Hz.We introduce the amplification calculation model,utilizing a firstorder approximation equation in broadba

关 键 词：固体激光器 啁啾脉冲放大 二极管泵浦 高能激光 高重复频率皮秒激光 

分 类 号：TN248.1[电子电信—物理电子学]