摘要
为了更精确地评价超短脉冲的特性,利用小波变换的时间频率联合分析和多尺度分析特性,将小波变换应用于光谱位相相干电场重构法(SPIDER),对给定脉冲进行了数值模拟,讨论了小波函数的形状因子对还原误差的影响,确定了形状因子的选取原则,采用与傅里叶变换互校的方法找到合适的形状因子以减小形状因子对还原结果的影响。对KLM钛宝石激光器输出的脉冲采用SPIDER法进行了测量,并与傅里叶变换结果进行了比较,证明了方法的准确性和可行性。
In order to measure ultrashort pulse more accurate, wavelet transform was applied to spectral phase interferometry of direct electric reconstruction （SPIDER） using joint time frequency analysis and multi-scale analysis feature. The given pulse was simulated based on wavelet transform. It was discussed that the influence of shaping factor to error of retrieval phase. The selecting principle of shape factor was determined. The characterization of Ti： sapphire laser was measured with SPIDER based on wavelet transform. The comparison with Fourier transform proves the precision of the above discussion.
出处
《量子电子学报》
CAS
CSCD
北大核心
2014年第6期678-682,共5页
Chinese Journal of Quantum Electronics
基金
国家自然科学基金(61168002)
关键词
激光技术
形状因子
小波分析
光谱位相相干电场法
laser techniques
shape factor
wavelet transform
spectral phase interferometry of direct electric reconstruction
