高功率钕玻璃激光三倍频脉冲时间波形的研究  

Research on pulse shape properties of high-power Nd:glass laser frequency tripling

作　　者：赵书林[1] 朱宝强[1] 詹庭宇[1] 蔡希洁[1] 刘仁红[1] 杨琳[1] 张志祥[1] 毕纪军[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《物理学报》2006年第8期4170-4175,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2002AA842110)资助的课题.~~

摘　　要：基于目前国内规模最大的激光驱动器———“神光Ⅱ”八路基频光已经实现功率平衡运行,通过改变其中若干路三倍频系统各调谐量的偏离,对输出三倍频波形进行束与束之间的横向对比研究.研究发现,对于Ⅱ类Ⅱ类偏振失配三倍频系统,在影响转换效率的三个调谐量中,偏振分配角失配Δθp对三倍频波形影响最大;在入射基频功率密度约为1.0GWcm2情况下,当三倍频系统三个调谐量都处在最佳匹配时,三倍频波形半峰全宽τ最小.研究工作为最终实现“神光Ⅱ”八路光束三倍频功率平衡输出提供了晶体调试的方法.On the laser driver ＂Shenguang Ⅱ ＂, eight fundamental beams have realized power balance. By changing detuning values of parameters of the frequency tripling systems, the output pulse shapes of the output beams are mutually compared. The experiment results indicate that for the type Ⅱ -type Ⅱ polarization-mismatch frequency tripling system, when the input intensity is about 1 GW/cm^2, of the three parameters that influence the fregueney tripling efficiency, polarization detuning angle △θp has the most important effect on the pulse shape. When all three parameters of tripling system are at the optimized values, the full width at half maximum of pulse shape τ reaches minimum. This work describes the method of crystal adjustment to actualize the power balance of the eight frequency tripling beams.

关 键 词：三倍频 时间波形 功率平衡 

分 类 号：TL632.1[核科学技术—核技术及应用]