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高功率激光在大气中传输时产生的非线性热畸变效应对激光的传输形成严重的限制 ,使光束质量严重下降 ,到达靶面的光强远低于初始光强。文中分析了非线性热畸变形成的物理机制 ,从光波在大气中传输的标量波动方程以及流体动力学方程组出发 ,对稳态和瞬态的各种非线性热畸变现象进行了分析 ,给出了非线性热畸变效应与激光参数的相关性 ,获得了较为满意的结果。
The nonlinear thermal distortion caused by the transmission of high-power laser in the atmosphere poses a serious limitation on the transmission of the laser beam, which seriously deteriorates the beam quality and the light intensity reaching the target surface is far lower than the initial intensity. In this paper, the physical mechanisms of nonlinear thermal distortion are analyzed. Based on the scalar wave equations and hydrodynamic equations of light waves propagating in the atmosphere, various nonlinear thermal and thermal phenomena of steady-state and transient are analyzed. The correlation between nonlinear thermal distortion and laser parameters was obtained and the satisfactory results were obtained.