小波变换提取放大超短脉冲载波-包络相位的研究

Abstract

提出了一种新的超短放大脉冲的载波-包络相位还原方法,应用小波变换从超短放大脉冲的光谱拍频干涉中直接提取载波-包络相位.消除了传统的Fourier变换方法不同宽度的滤波窗口引入不同程度的相位噪声而产生不确定性的影响,得到了更精确的载波-包络相位信息,对于近单周期超短脉冲特性测量具有重要意义.

A novel technique, based on wavelet-transform analysis, was introduced for the carrier-envelope phase extraction in this paper. With wavelet analysis technique, the carrier-envelope phases of amplified ultrashort optical pulses were directly extracted from the spectral interferences. The technique need no Fourier-transform and filter procedure, therefore, the uncertainty introduced from the filter is avoided naturally. Wavelet-transform technique extracted accurate carrier-envelope phase, therefore we hope it can find applications in the measurements and characterizations of few- to mono-cycle femtosecond optical pulses.