基于光谱相位相干直接电场重建法(SPIDER)测量飞秒激光脉冲的基本原理和重构相位的反演算法,数值模拟了SPIDER技术重构飞秒脉冲相位的过程,分析了非线性晶体、时间延迟τ、光谱剪切量Ω的选取原则。以高斯型线性啁啾脉冲为例,还原出了脉冲的位相,得到不同的待测脉冲重构出的最佳位相曲线具有不同的最佳延迟时间和光谱剪切量。 Based on SPIDER, the basic principle of the femtosecond laser pulse and the inversion algorithm of the reconstructed phase are numerically simulated. The process of SPIDER reconstruction of the femtosecond pulse phase is numerically simulated. The nonlinear crystal, time delay τ, the principle of selecting the amount of spectral shear Ω. Taking the Gaussian linear chirp pulse as an example, the phase of the pulse is restored, and the optimal phase curve reconstructed from different pulses under test has different optimal delay times and spectral shear rates.