光纤激光器被动调Q速率方程，修改参数可实现三能级四能级激光器模拟(Passive Q-rate equation of fiber laser)

用matlab通过速率方程解决调Q模拟，主要模拟了可饱和吸收体被动调q的过程。(Matlab is used to solve the Q-switching simulation through the rate equation. The process of passive Q-switching of saturable absorber is mainly simulated.)