自启动KLM钛宝石激光器谐振腔的理论计算

运用四阶RungeKutta法直接求解非线性介质内椭圆高斯光束传播方程组的方法分析增益介质内的克尔透镜(Kerrlens)效应,结合在增益介质外运用的线性ABCD矩阵寻找自洽解,对半导体可饱和吸收镜(SESAM)启动的高功率KLM钛宝石激光器谐振腔的像散、稳定性、光束参数、自聚焦效应和克尔自聚焦强度与腔参数的关系进行了系统的理论计算.计算结果与实验结果相符合.该计算为SESAM启动的五镜腔KLM激光器的设计和调整提供了理论依据关键词：克尔透镜锁模飞秒半导体可饱和吸收镜五镜腔

Theoretical analyses of the cavity of a self-starting Kerr-lens mode-locked Ti:sapphire laser

In this paper,we theoretically analyzed the astigmatism,stability,beam parameters and strength of Kerr self-focusing in the cavity of a KLM laser.In these calculations,we used a new method in which we combined the ABCD matrices outside the nonlinear medium with solving the propagation equation group of elliptical Gaussian-beam directly by fourth-order Runge-Kutta method in the nonlinear medium.From that method we got self-consistent q parameters to analyze the five-mirror cavity of a SESAM started KLM laser.These results provide a theoretical basis for the designs and experiments of this kind of lasers.