物理学报2012，Vol.61Issue(9)：292-297,6.
基于交叉偏振波产生的脉冲净化技术研究与应用
Experimental research and application of pulse clean technique based on cross polarized wave generation
摘要
Abstract
Cross polarized wave （XPW） generation technique is used to improve the contrast of the output pulses from a 800 nm Ti： sapphire femtosecor~d （fs） laser. The measured temporal contrast of the cleaned pulse is 1011 （limited by the dynamic range of the third-order auto-correlator）, which is 3 orders of magnitude higher than the temporal contrast ratio of the initial pulse. The efficiency of XPW is 22%. And the bandwidth of the cleaned pulse is broadened after the XPW nonlinear process. Through the dispersion compensation using double chirped mirrors and fused silica plate, the 25 fs pulse duration is achieved. With the cleaned pulse used as the seed of a TW-level Ti： sapphire chirped-pulse amplification laser system, the 250 mJ/50 fs pulses corresponding to 5 TW peak power are obtained. And the 1011 temporal contrast is demonstrated on the time scale of hundreds of picoseconds before the main femtosecond pulse.关键词
脉冲净化/交叉偏振波产生/啁啾脉冲放大/脉冲对比度Key words
pulse clean/cross-polarized wave generation/chirped-pulse amplification/pulse contrast分类
信息技术与安全科学引用本文复制引用
王建州,黄延穗,许毅,李妍妍,陆效明,冷雨欣..基于交叉偏振波产生的脉冲净化技术研究与应用[J].物理学报,2012,61(9):292-297,6.基金项目
中国科学院,国家自然科学基金（批准号：10734080,60921004,60908008,61078037）,国家重点基础研究发展计划（批准号：2011CB808101）,国际科技合作计划（批准号：2011DFA11300）和上海科委科技基金（批准号：09QA1406500）资助的课题. （）
