增益开关半导体激光器的输出光脉冲具有“红移”啁啾，本文对具有不同时域及频域特性的啁啾光脉冲采用F－P滤波和正常色散光纤补偿两种消啁啾的效果进行了理论研究．结果表明，这两种消啁啾方法在单独运用时，都只能在一定的超短光脉冲脉宽和诺宽特性条件下，获得近变换极限光脉冲，而两种消啁啾方法的结合则可以改善消啁啾效果．实验结果也证明了理论计算的结论． The output pulse of the gain-switched semiconductor laser has a “redshift” chirp. In this paper, chirped light pulses with different time-domain and frequency-domain characteristics are attenuated by both F-P filtering and normal dispersion fiber compensation theoretical research. The results show that the two methods of eliminating chirp can only obtain the near-extremal light pulses under the condition of certain pulse width and the characteristics of No-width of ultrashort pulse when used alone. However, the combination of the two methods of eliminating chirp You can improve the elimination of chirp effect. The experimental results also prove the conclusion of theoretical calculation.