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针对存在激发态吸收 (ESA)的被动式调Q激光器 ,采用绝热近似 (AEA)方法和微分方程的Hopf分岔条件 ,将被动调Q产生的多脉冲序列与由光强和反转粒子数密度所构成相平面上的极限环运动对应起来 ,得到了产生Q脉冲阈值的定量关系式和表示脉冲周期 (重复频率 )的解析解。解释了Cr4 + ∶YAG调Q激光器的有关现象 ,获得了与有关实验相一致的结果。
A passive Q-switched Q-switched laser with excited state absorption (ESA) is simulated by the Hopf bifurcation condition of adiabatic approximation (AEA) and differential equations. The multi-pulse sequence generated by passive Q- Correspondingly, the quantitative relation of Q pulse threshold and the analytic solution of pulse period (repetition frequency) are obtained. Explain the related phenomenon of Cr4 +: YAG Q-switched Q-laser and get the same result as the related experiments.