用多模相干态描述光场，应用预解算符和投影算符推导演化算符，使本方法可统一处理锁模激光脉冲序列输出及原子的共振多光子过程。
This method can be used to describe the resonant multi-photon processes that the pulse train from the mode locked laser interacting with atoms.
着重研究了抽运功率、腔长、输出镜透过率以及初始透过率等因素对激光输出脉冲序列的重复率、脉冲宽度以及输出功率的影响。
The focus is given to the influence of pumping power, cavity length, the output coupler transmission and initial transmission on the repetition rate, pulse width and output power of laser output.
计算表明：Q开关放置在输出镜一侧会使脉冲序列更加稳定。
The theoretical results show placing the acoustic-optic Q-switch crystal near the output mirror can improve the stability of pulse train.
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