Littrow angle based autocollimation method for precision online monitoring three-dimensional angular drifts of chirped-pulse compression-gratings.
Littrow angle based autocollimation method for precision online monitoring three-dimensional angular drifts of chirped-pulse compression-gratings.
复制标题
DOI：
10.1063/1.4811148
复制
发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Z. Li;Tao Wang;Guang Xu;Dawei Li;Lei Chen;Ya-ping Dai
中科院分区：
文献类型：
--
作者：
Z. Li;Tao Wang;Guang Xu;Dawei Li;Lei Chen;Ya-ping Dai
提出了一种在线精确监测啁啾脉冲放大（CPA）激光器中啁啾脉冲压缩光栅三维角漂移的简单光学方法。监测对象包括光栅的全方位角漂移，特别是光栅槽面内旋转。监测内容包括方向和数量。通过检测三元监测光束线形成的三个焦斑的二维相对偏移量和方向，得到监测结果。利用矩阵射线追踪法建立了该方法的理论模型，并通过数值模拟得到了简化的监测方程。并通过简单的演示实验验证了该方法的有效性。此外，还对该方法的监测误差和可靠性进行了讨论。
A simple optical method for online precisely monitoring three-dimensional (3D) angular drifts of chirped-pulse compression-gratings in chirped-pulse amplification (CPA) lasers is proposed. Monitoring objects include all dimensional angular drifts of a grating, especially the grating groove in-plane-rotation. Monitoring contents contain direction and amount. And monitoring results are obtained by detecting the direction and the amount of 2D relative offsets of three focal spots formed by a ternary monitoring beam line. The theoretical model of the proposed method is set up using a matrix ray-tracing method, and a simplified monitoring equation is concluded based on numerical simulations. And the validity of this method is verified by a simple demonstration experiment. Besides, monitoring error and reliability discussion of the method are presented, as well.