提出了一种由一段正色散光纤和一段负色散光纤构成的光纤链路的压缩脉冲的简易方法:采用正色散光纤将初始脉冲整形为抛物自相似脉冲,并以负色散光纤作为脉冲压缩器对整形脉冲进行压缩。采用对称分步傅里叶方法研究了不同初始啁啾对脉冲整形的影响,并用一个只与脉冲形状有关的无量纲因子衡量脉冲整形效果。发现初始负啁啾有利于加快脉冲的整形速度,而初始正啁啾时得到的最佳抛物自相似脉冲的啁啾线性范围较宽。并理论和数值分析了三阶色散对脉冲压缩的影响。结果表明,利用三阶色散部分补偿方法可以削弱三阶色散对脉冲演化的影响,得到高质量高压缩比的输出脉冲。 A simple method of compressing pulses from a fiber link composed of a positive dispersion fiber and a negative dispersion fiber is proposed. The initial pulse is shaped into a parabolic self-similar pulse by a positive dispersion fiber and a negative dispersion fiber is used as a pulse compressor pair Plastic pulse compression. The effect of different initial chirp on pulse shaping is studied by the symmetric step Fourier method, and the pulse shaping effect is measured by a dimensionless factor related only to pulse shape. It is found that the initial negative chirp accelerates the shaping speed of the pulse, and the chirp of the best parabolic self-similar pulse obtained from the initial positive chirp has a wide linear range. The influence of third-order dispersion on pulse compression is analyzed theoretically and numerically. The results show that the use of third-order dispersion partial compensation method can weaken the impact of third-order dispersion on the pulse evolution, high-quality high-compression ratio of the output pulse.