介绍了用于惯性约束核聚变(ICF)前端系统的光纤脉冲堆积器的基本原理．该堆积器对种子脉冲分束、延时、调幅、合束，最后整形出任意形状的脉冲．通过数值模拟分析了种子脉冲形状、脉冲之间的时延和相位差以及光学滤波对脉冲堆积波形的影响．结果表明，增大脉冲的上升沿和下降沿，控制相邻脉冲之间的相位差在π／2，并对输出脉冲进行光学滤波后能够获得上升沿小于100 ps、脉冲顶部起伏小于5%、时间准确度为100 ps的整形脉冲．

The basic principle of the optical fiber pulse stacker in Inertial Confinement usion(ICF) front end system is described. When the seed pulse is split,time delayed,amplitude modulated and combined in the stacker,last arbitrary shape pulse is shaped. The effect of the seed pulse shape,the time delay and phase difference between pulses and optical filtering on stacking pulse shape is analyzed through numerical simulation. The results show that the shaping pulse with less than 100 ps rising edge,less than 5% pulse fluctuation,100 ps time precision can be obtained through increasing rising edge and falling edge,controlling phase difference at π/2 between adjacent pulse and filtering output pulse. The performance index can satisfy the application of ICF.