基于空间频谱分析方法，建立了光谱色散匀滑技术(SSD：Smoothing by Spectral Dispersion)与衍射光学器件(DOE：Diffractive Optical Element)联用性能的简化分析模型，为SSD与DOE联用时，SSD参量的优化提供了理论依据．数值模拟了SSD各参量，包括脉冲时间、调制频率、位相调制系数、光栅线色散系数等对束匀滑性能的影响．模拟结果表明，SSD参量经过优化选取，且波前畸变随时间快速变化时，能获得良好的束匀滑性能．

A theoretical model to analyze the beam smoothing performance,realized by the diffractive optical element (DOE) and the smoothing by spectral dispersion (SSD) technique,is setup based on the spatial frequency spectra analysis method. Utilizing this theoretical model,the parameters,including the integration time,the modulation frequency,the phase modulation coefficient and the linear dispersion of the diffraction grating,of the SSD technique can be optimized to improve the beam smoothing performance. The influences of the parameters of the SSD technique on the beam smoothing performance are numerically analyzed. Furthermore,the simulated results show that the phase distortion should be changed during the integration time in order to obtain a good beam smoothing performance.