等离子体电极普克尔盒性能提升研究  

Research on performance promotion of plasma electrode Pockels cell

作　　者：吴振海 龙蛟 李珂[1] 田晓琳[1] 熊迁[1] 张君[1] 胡东霞[1] Wu Zhenhai;Long Jiao;Li Ke;Tian Xiaolin;Xiong Qian;Zhang Jun;Hu Dongxia(Laser Fusion Research Center,CAEP,Mianyang 621900,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

出　　处：《强激光与粒子束》2023年第6期45-48,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(62005258,62105310)。

摘　　要：等离子体电极普克尔盒被广泛应用于大型激光驱动器中,用于抑制自激振荡、实现多程放大控制和反激光隔离,普克尔盒内的放电电极在长期使用过程中与腔内残余O_(2)发生反应出现退化现象,导致稳定性下降,寿命降低。为此,提出了封离型等离子体电极普克尔盒,其放电腔内的Ne气浓度可达99.9%,漏率小于1.0×10^(−10)Pa∙m^(3)∙s^(−1),理论使用年限大于40年。实验表明,封离型等离子体电极普克尔盒在工作20万发次后,其放电电极依然光亮如新,时间抖动仍稳定在6.4 ns附近,稳定性有了大幅提升。A sealed plasma electrode pockels cell(PEPC)has been developed for use on the petawatt and exawatt class laser system that can be used in high-contrast optical switch,as required for suppression of selfoscillation,isolation from retroreflected pulses,and control of output beams.The initial concentration of Ne in the discharge cell is more than 99.9%,which prevents the discharge electrodes from reacting with O_(2)comparing with unsealed PEPC.The theoretical lifetime of the sealed PEPC is more than 40 years as the leak rate of the sealed PEPC is smaller than 1.0×10^(−10)Pa∙m^(3)∙s^(−1).The experimental results show that,the discharge electrodes in the sealed PEPC are still as fresh as new after firing 200,000 times and the time jitter is still below 6.4 ns.

关 键 词：电光开关 等离子体电极 普克尔盒 气体放电 封离型开关 

分 类 号：TN248.1[电子电信—物理电子学]