强激光与粒子束, 2010, 22 (8): 1852, 网络出版: 2010-09-15   

单发次皮秒脉冲对比度的三阶自相关法测试技术

Contrast ratio measurement of single shot picosecond pulse using third-order noncollinear autocorrelation technique
作者单位
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
摘要
为了测试单发次皮秒脉冲对比度, 设计并研制了非共轴三阶自相关仪。三阶自相关仪参数优化设计中, 在确保获得正确的相关耦合信号的前提下, 充分利用KDP晶体的极化张量, 寻找有效非线性系数相对较高的相位匹配点, 在满足非共线相位匹配条件的同时兼顾群速匹配, 为增大时间测试范围,选取较大的入射光夹角。采用分区测试和图形重构技术, 增大对比度测试的动态范围, 结果显示采用两个科学级CCD测试的脉冲对比度在105左右。
Abstract
A noncollinear third-order autocorrelator was designed and manufactured for contrast ratio measurement of single shot picosecond pulses. Under the premise of obtaining correct cross-correlation signals during the parameters optimization, it was still important to consider the conversion efficiency of the third harmonic wave. The noncollinear phase matching value with the maximum efficient nonlinear coefficient was taken into account according to the polarization tensor of a nonlinear crystal KDP. The noncollinear phase matching and group-velocity mismatch were synchronously satisfied, and large noncollinear angles of the incident pulses were selected for the increase of the test range of time. The prepulse and main peak were separately measured, and two-image reconstructive technology was adopted in our measurement to increase the dynamic range. It is shown that the contrast ratio of the laser system is about 105 using two scientific-grade CCDs.

孙志红, 夏彦文, 刘华, 傅学军. 单发次皮秒脉冲对比度的三阶自相关法测试技术[J]. 强激光与粒子束, 2010, 22(8): 1852. Sun Zhihong, Xia Yanwen, Liu Hua, Fu Xuejun. Contrast ratio measurement of single shot picosecond pulse using third-order noncollinear autocorrelation technique[J]. High Power Laser and Particle Beams, 2010, 22(8): 1852.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!