在两种不同条件下分别讨论了平行光栅对压缩器输出激光脉冲的时间稳定性，采用数值计算的方法定量分析了光束指向性、折返镜姿态变化、光栅对平移误差等因素对压缩器输出脉冲脉宽的影响以及在不同光栅刻线密度下输出脉冲对这些因素的敏感程度，并给出了不同条件下不同影响因素的误差容许范围。

The temporal stability of output pulse from the parallel grating pair compressor is discussed under two different conditions. The influence of the beam pointing variance, the retro-mirror misalignment, and the grating pair translational error on the output pulse width from the compressor is quantitatively analyzed by means of numerical calculation. When the grating groove density changes, the sensitivity of the output pulse to these factors is also discussed. Moreover, the allowable tolerance ranges of the aforementioned factors under different conditions are presented.