对增益开关分布反馈半导体激光器(GS-DFB-LD)加法布里-珀罗共振腔滤波方法产生变换限制脉冲源进行了理论分析，设计出将不同光源变为变换限制脉冲所需的滤波器带宽，并计算出相应的输出脉冲脉宽谱宽，从实验上获得了变换限制脉冲，本文还研究了测谱仪器分辨率对测量结果的影响，导出了一套测量修正理论。

In this paper, the method of gain switched distributed feedback semi conducter laser with Fabry Perot Resonator (FPR) filter to generate transform limited pulses is analyzed theoretically. The filter bands needed to make pulse satisfy transform limited condition for different sourses are obtained and the corresponding output pulse width and spectrum width are calculated. The transform limited pulse is generated experimentally. The influence of resolution of spectrum measuring instrument on measured result is analyzed, and the correction theory is derived.