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本文介绍利用国产量子阱半导体分布反馈（DFB）激光器的增益开关效应，产生重复频率为5GHz、1．55μm的超短光脉冲，经正常色散光纤（色散参数D＜0）补偿消啁啾，获得了近变换极限的光脉冲，并成功地进行了31公里的光孤子传输．
In this paper, we introduce the gain switching effect of a DFB laser made in a domestic quantum well to generate ultrashort optical pulses with a repetition frequency of 5GHz and 1.55μm, and compensate for the chirp by normal dispersion optical fiber (dispersion parameter D <0) Nearly transforms the light pulse of the limit and succeeds in the transmission of optical solitons of 31 kilometers.