基于脉冲复制的单脉冲激光对比度测量  

Temporal contrast measurement of a single-shot laser pulse by optical pulse replication

作　　者：袁索超 高立民[1] 李东坚[1] 赵娟宁[1,2] 

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119 [2]中国科学院大学,北京100049

出　　处：《强激光与粒子束》2014年第5期78-83,共6页High Power Laser and Particle Beams

基　　金：激光参数测量组件研究与方案验证项目

摘　　要：为测量超短单脉冲激光的时间波形以及对比度信息,基于三阶强度相关原理,结合光脉冲复制技术,提出了基于脉冲复制的测量方法。对测量原理进行了详尽的理论分析。利用分步傅里叶和龙格库塔数值计算方法对测量方案做了模拟验证。基于脉冲复制的测量法能同时进行多窗口测量。通过拼接测量时间窗口,可以有效解决测量分辨率与测量时间窗口不能兼顾的问题,同时实现大时间窗口和高分辨率测量。通过将主脉冲与预脉冲分离到不同的测量窗口,避免了梯度衰减片的使用,且具有高对比度测量能力。For the measurement of the time profile and the contrast information of the ultrashort laser pulse, based on the third-order intensity correlation principle, using optical pulse replication, a measurement method is proposed. Theoretical analysis is made about the measurement method. The simulation was done with split-step Fourier and Runge-Kutta methods. By measur- ing the pulse with pieces of windows and piecing the windows together, the measuring range can be enlarged. Thus a high resolu- tion and large window measurement is achieved. The pre-pulse and main pulse are separated into different windows to avoid the use of gradient attenuator, and provides high-contrast measurement capability.

关 键 词：单脉冲 对比度测量 三阶强度相关 脉冲复制 

分 类 号：TN241[电子电信—物理电子学]