电光双折射扫描滤波法提高啁啾脉冲对比度  

Improvement of chirped pulse contrast using electro-optic birefringence scanning filter method

作　　者：曾曙光[1,2] 王向林[3] 张彬[2] 王屹山[3] 孙年春[2] 王飞[1] 

机构地区：[1]三峡大学理学院新能源研究院,湖北宜昌443002 [2]四川大学电子信息学院,成都610064 [3]中国科学院西安光学精密机械研究所,西安710119

出　　处：《强激光与粒子束》2013年第1期47-51,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11104163);三峡大学优秀人才科研启动基金项目(KJ2011B066)

摘　　要：提出了一种通过扫描滤波来提高啁啾脉冲对比度的方法,并分析了该方法的原理。与传统的非线性滤波技术不同,扫描滤波方法消除预脉冲时,选通原理是基于光的频率而不是强度。以电光双折射扫描滤波器为例,说明了扫描滤波法的具体应用。通过数值模拟及实验研究,发现电光双折射扫描滤波法可以有效地消除主脉冲以前几百ps的预脉冲,并且主脉冲同时还能保证较高的透过率。A method using scanning filter to improve the contrast of chirped pulse is proposed, and the principle of this method is analyzed. The scanning filter is compared with the existing pulse-picking technique and nonlinear filtering technique. The scanning filter is a temporal gate that is independent on the intensity of the pulses, but on the instantaneous wavelengths of light. Taking the electro-optic birefringence scanning filter as an example, the application of scanning filter methods is illustrated. Based on numerical simulation and experimental research, it is found that the electro-optic birefringence scanning filter can elimi- nate a prepulse which is several hundred picoseconds before the main pulse, and the main pulse can maintain a high transmissivi- ty.

关 键 词：扫描滤波 对比度 啁啾脉冲 预脉冲 电光效应 

分 类 号：TN24[电子电信—物理电子学]