用SHG-FROG方法测量超短光脉冲的振幅和相位

MEASUREMING THE AMPLITUDE AND PHASE OF ULTRASHORT PULSES USING SHG-FROG

介绍了二次谐波振荡 频率分辨光学快门 (SHG FROG)测量超短脉冲的实验系统和二维相位恢复算法 ,这种方法可以实现对超短脉冲振幅和相位的完全测量 利用矩阵方法数值模拟了几种常见超短脉冲的SHG FROG迹线 ,并用主元素广义投影算法 (PCGPA)从这些无噪音的SHG FROG迹线中恢复了脉冲的振幅和相位 ,误差接近收敛的标准 研究结果表明 ,这种测量方法结构简单 ,算法可靠 。

Second harmonic generating frequency resolved optical gating (SHG FROG) is one of techniques measuring the amplitude and the phase of ultrashort pulses.Experimental system of SHG FROG and the two dimension phase retrieval algorithm have been introduced.Numerically simulated SHG FROG trace of several types of common ultrshort pulses has been generated using a matrix approach,then the amplitude and the phase of this pulses have been retrievaled from these free noise SHG FROG traces by the principal component generalized projections(PCGP)algorithm,and the SHG FROG error near the criterion of convergence.