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系统地研究了用带有非线性倍频晶体的附加耦合腔来压窄激光光脉冲的动力学作用过程，首次给出了该锁模激光系统在瞬态平衡时输出脉宽的具体表达式；实验测量结果与理论计算值相比吻合得很好；最后，文中还报道了有关实验参量与该锁模激光系统输出特性的关系曲线．
The dynamic process of the laser pulse with the additional coupling cavity with nonlinear frequency doubling crystal is systematically studied. The specific expression of the output pulse width of the mode - locked laser system is given for the first time. The experimental results are in good agreement with the theoretical ones. Finally, the relationship between the experimental parameters and the output characteristics of the mode-locked laser system is also reported.