小畸变参数情况下稳态热晕效应数值分析

根据几何光学近似和小扰动理论,推导了高斯光束热晕效应的解析公式,据此解析公式对准直高斯波束的热晕效应进行了计算。结果表明,热畸变参数越大,热晕效应越强,但是,随着热畸变参数的增大,上述解析公式不再适用。

Numerical Analysis of Steady Thermal Blooming under the Small Thermal Distortion Parameter

According to the geometrical optics approximation and small perturbation theory,the analytic formula of thermal blooming effect for Gaussian beam was deduced in the paper.With this analytic formula,thermal blooming effect of collimated Gaussian laser beam was calculated.The result shows that the greater,the thermal distortion parameter is,the stronger thermal blooming effect is.However,as thermal distortion parameter increases the analytic equation is no longer applicable.