基于共轭反射的高功率激光装置脉冲同步测试技术

Conjugate-Reflection-Based Measurement of Time-Synchronization in High-Power Laser Facility

提出一种基于共轭反射的高功率激光装置靶点时间同步测试方法。首先在靶点两侧放置一对相互平行、相对靶点距离相等的反射镜,在反射镜关于靶点的共轭像点处放置两个高速光电探测器,随后将靶室上下两个半球入射到靶点的激光分别反射到共轭像点的两个光电管上,光电管输出波形信号的时间间隔即为待测光路之间的时间同步差。该测试方法具有操作简单、测试效率高等特点,已成功应用于高功率激光装置多路激光时间同步的精密诊断。

A conjugate-reflection-based time-synchronization measurement method is proposed for target points of a high power laser facility.First,two parallel reflectors with equal distances from the target point are placed on both sides of the target point,and simultaneously two high-speed photodiodes are placed on the conjugate image point of the target point.Second,two laser beams from the up and down hemispheres in the target chamber are reflected to the two photodiodes placed on the conjugate image point of the target point,and the time interval between two output signals from the two photodiodes is just the time-synchronization difference between the optical paths to be measured.The proposed measurement technology possesses nice characteristics of simple operation,high test efficiency,which has been successfully applied in the time-synchronization measurement of multiple laser beams in high-power laser facilities.