对基于单模光纤的锁模再生放大器(即基于脉冲起振的耗散孤子锁模激光器)的动力学过程进行数值模拟，分析了输出脉冲能量、时域宽度、光谱宽度随入射脉冲在腔内循环次数增加的演化过程。实验中通过插入电光调制器使振荡腔从脉冲起振，阐述了该电光调制器选取脉冲的工作时序，实现了入射脉冲在腔内稳定循环13次；同时,在固定入射脉冲腔内循环2次的前提下，分析了抽运功率对输出光谱的影响,最终输出单脉冲能量为20 nJ，光谱宽度约为60 nm的脉冲。此外，还分析了基于单模光纤的锁模再生放大器输出脉冲能量增长受限的原因。

The dynamic evolution of the mode-locked regenerative amplifier based on single mode fiber, which is also called pulse-based start-up dissipative soliton mode-locked laser, is numerically simulated, and the evolutions of the pulse energy, pulse duration, and spectral bandwidth versus the cycling number of the incident pulse in the cavity are analyzed. By using an electro-optic modulator in the cavity, the input pulses can be successfully injected into the cavity for circulation. With the demonstration of the timing sequence of the modulator, the laser runs steadily for 13 roundtrip. Meanwhile, when the circulation roundtrip is fixed at 2, the influence of the pump power on the output spectrum is investigated. The final output laser pulse has a spectral bandwidth of 60 nm and single-shot pulse energy of 20 nJ. Besides, the reason that the output pulse energy is limited in the mode-locked regenerative amplifier based on a single mode fiber is also analyzed.