提出并实验验证了一种基于光频梳的超短光脉冲的产生方法。使用强度调制器和相位调制器级联直接调制直流激光得到了29条顶部功率变化小于1.5 dB的光频梳。利用单模光纤色散将光频梳整形成重复频率为10 GHz，脉宽为2.68 ps 的光脉冲。并成功用于对1~4 GHz信号采样，系统的信噪比可达33.83 dB，等效于5.33 bit的有效比特数。

A scheme for the generation of ultra-short optical pulse, based on optical frequency comb (OFC), is proposed and demonstrated experimentally. An OFC with 29 comb lines within 1.5 dB spectral power variation is obtained by cascading intensity and phase modulators modulating a continuous wave laser. The OFC is dispersed by a segment of single mode fiber (SMF). Ultra-short optical pulses with 10 GHz repetition rate and 2.68 ps pulse width are demonstrated. The pulses are used for sampling 1~4 GHz radio frequency signals. The signal-to-noise ratio of this scheme is 33.83 dB, equivalent to effective bit number of 5.33 bit.