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采用SHG-FROG单次测量红外长波长超快激光脉冲宽度和相位
引用本文:许灿华,冷雨欣,张春梅,黄延穗,陆效明,葛晓春,李闯,宋立伟,陈晓伟.采用SHG-FROG单次测量红外长波长超快激光脉冲宽度和相位[J].中国激光,2011(3).
作者姓名:许灿华  冷雨欣  张春梅  黄延穗  陆效明  葛晓春  李闯  宋立伟  陈晓伟
作者单位:中国科学院上海光学精密机械研究所强场激光物理国家重点实验室;
基金项目:国家973计划基金(2006CB806001); 国家自然科学基金(60921004,60908008); 上海市科委项目(09QA1406500)资助课题
摘    要:描述了一套二次谐波型频率分辨光学快门(SHG-FROG)装置,用于单次测量红外长波长超快激光脉冲的脉宽和相位信息。针对在该波段宽带的高损伤阈值介质膜镀膜困难,且价格昂贵的问题,采用两个半圆形全反平面银镜来代替传统的半透半反镜进行分光。同时改进后的光路可以减少测量误差,结构更加紧凑且便于调节。采用该装置对基于钛宝石参量放大的红外超快脉冲进行测试,得到当中心波长为1.8μm时,脉宽为66.9 fs,谱宽54.5 nm,谱相中的二阶群延时色散(GDD)为202.9 fs2。

关 键 词:超快光学  频率分辨光学快门  红外  超快激光  

Using SHG-FROG to Measure Intensity and Phase of Infrared Long Wavelength Ultra-Fast Laser Pulse in Single Shot
Xu Canhua Leng Yuxin Zhang Chunmei Huang Yansui Lu Xiaoming Ge Xiaochun Li Chuang Song Liwei Chen Xiaowei.Using SHG-FROG to Measure Intensity and Phase of Infrared Long Wavelength Ultra-Fast Laser Pulse in Single Shot[J].Chinese Journal of Lasers,2011(3).
Authors:Xu Canhua Leng Yuxin Zhang Chunmei Huang Yansui Lu Xiaoming Ge Xiaochun Li Chuang Song Liwei Chen Xiaowei
Affiliation:Xu Canhua Leng Yuxin Zhang Chunmei Huang Yansui Lu Xiaoming Ge Xiaochun Li Chuang Song Liwei Chen Xiaowei(State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)
Abstract:A frequency-resolved optical gating(FROG) apparatus which can be used to measure the intensity and phase of infrared long wavelength ultra-fast laser pulse in single-shot is described.Because the high damage threshold coating in this waveband is difficult and expensive,we use two half-semicircle mirrors to substitute traditional transmitted beam splitter.Meanwhile,error of measurement in the improved configuration will be diminished,and the whole device becomes more compact and easier to be adjusted.We util...
Keywords:ultra-fast optics  frequency-resolved optical gating  infrared  ultra-fast laser  
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