采用单偏振调制器(PolM)或双偏振调制器，我们提出并实现了两种四倍频光脉冲序列生成方案。第一种方案采用单偏振调制器级联色散介质(比如啁啾光纤Bragg光栅)的结构，而第二种方案采用双偏振调制器的并联结构。在两种方案中，光脉冲序列的基本原理如下：对相位调制型光信号的频谱分量进行周期型抑制，即抑制每4个频率分量的3个，从而生成四倍频光脉冲。在四倍频光脉冲生成的验证实验中，当施加3.4GHz的正弦信号时，获得了重复频率为13.6GHz的归零码光脉冲序列。“,”Two approaches are proposed to generating repetition-rate quadrupled optical pulse trains using a polarization modulator (PolM) or a pair of PolMs. In the first approach, a PolM is used in conjunction with a dispersive element (i.e., a chirped fiber Bragg grating). In the second approach, a pair of PolMs which are connected in parallel are employed. The fundamental principle in achieving repetition-rate quadrupling is the periodic suppression of three consecutive optical spectral lines of a phase-modulated light wave. A proof-of-concept experiment is performed in which a return-to-zero (RZ) pulse train having a repetition rate of 13.6 GHz is generated when a sinusoidal signal at 3.4 GHz is applied.