碰撞锁模环形染料激光器动力学过程的研究

本文在建立碰撞锁模(CPM)激光器数学模型的基础上,对碰撞锁模激光器中激光锁模脉冲形成的动力学过程进行了计算机模拟计算,并对其结果进行了理论分析和讨论,得到了脉冲宽度、脉冲波形及对称性与泵浦速率、腔长、增益介质和可饱和吸收介质在腔内的相对位置等因素间的关系。

Study of dynamic processes for colliding pulse mode-locking dye lasers

According to the rate equation, a theoretical model which describes the dynamic processes for colliding pulse mode-locking (CPM) dye lasers was established in this paper. In this theoretical model saturations of the gain and absorbing media,interaction between the pulses and the population distribution grating introduced by the two pulses colliding in the absorber jet, and dispersion were included. Using this theoretical model we calculated the dynamic processes for 0PM dye lasers. In particular the evolvement of the pulse duration with the round trip number was calculated numerically. We found that the difference between durations of the two pulses propagating clockwise and anti-clockwise in the cavity was strongly dependent on the relative position of the gain jet and the absorber jet in the cavity. The dependence of the pulse duration and pulse shape on the pump rate, cavity length, loss and cavity structure was calculated numerically. The asymmetricity of the pulse shape was obtained for certain cavity structures.