大口径KDP晶体角度相位匹配离线测量精度研究  

Measurement precision for phase-matching angle of large-aperture KDP crystals

作　　者：徐旭[1] 熊召[1] 叶朗[1] 刘长春[1] 袁晓东[1] 曹庭分[1] 贾凯[1] 

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》2013年第12期3189-3192,共4页High Power Laser and Particle Beams

摘　　要：为满足惯性约束聚变(ICF)实验对激光驱动器高效三倍频能力的要求,对离线测量晶体角度相位匹配方案进行了优化。采取的主要优化措施是:提高晶体准直技术能力;降低模拟小口径激光输出变化对测量不稳定性的影响。通过理论分析和对实际测量结果的系统分析,得到了晶体离线测量的不确定度:其中二倍频相位匹配角测量扩展不确定度为15.94μrad,三倍频相位匹配角测量扩展不确定度为27.8μrad,达到了较高的晶体离线测量精度要求。To meet the requirements of the inertial confinement fusion （ICF） experiments on laser driver efficient third har- monic capacity, we optimized the program for offline measurement of the crystal phase matching angle. The optimization meas- ures include improving the ability for the collimation of crystal, and reducing the instability of measurement due to the output change of small diameter laser. Through theoretical analysis and systematic analysis of the actual measurements, high accuracies of offline measurement of crystal are obtained. Namely, the expanded measurement uncertainty of the second harmonic phase- matching angle is 15.94 μrad, and the uncertainty of the tripler phase matching angle is 27.8μrad.

关 键 词：惯性约束聚变 KDP晶体 相位匹配角 最小二乘法 

分 类 号：O437.1[机械工程—光学工程]