研究了相敏光放大器 (PSA)中抽运光和信号光之间存在相位漂移时 ,信号脉冲波形对级联相敏光放大器光纤通信系统传输性能的影响。通过系统仿真 ,得到了在不同的相位漂移下高速信号脉冲眼图劣化度随光纤色散变化的曲线 ,以及在给定的光纤色散下放大器有相移与无相移时信号眼图劣化度随信号脉冲指数变化的曲线。由仿真结果可知 ,脉冲波形不同对系统性能的影响亦不同。采用超高斯脉冲的系统性能优于采用高斯脉冲 ,而且超高斯脉冲指数存在最佳值 The influence of signal pulse waveform on the transmission performance of a cascaded optical fiber amplifier is studied when the phase shift exists between the pump light and the signal light in a phase sensitive amplifier (PSA). Through the simulation of the system, the curve of the degeneracy of the high-speed signal pulse eye with the dispersion of the optical fiber under different phase shifts is obtained, and the degree of signal eye degradation of the signal with the phase-shifted and non-phase-shifted amplifier with a given optical fiber dispersion Pulse index changes in the curve. The simulation results show that different pulse waveforms have different effects on system performance. System performance using super-Gaussian pulses is superior to using Gaussian pulses, and there is an optimal value for the super-Gaussian pulse index