热容激光器激光介质的热力学数值模拟

Numerical simulation of thermodynamics in laser medium for heat capacity laser

为模拟激光介质的温度、热应力的分布和变化,建立了激光介质热力学计算模型。该模型从激光介质的瞬态导热微分方程出发,得到沿纵向的热沉积功率密度,并将其作为该微元段的热载荷,加载到该微元段的泵浦区。考虑热容值、热导率、热膨胀系数和弹性模量等与温度的关系,得到激光介质的温度分布和变化,以及热应力的分布和变化。为热容激光器的实验和设计提供参考依据。

The thermodynamic model was established for analyzing the temperature and the thermal stress in laser medium. The transient heat conduction equation is the base in the model. First, the longitudinal distribution of the heat deposition power density was got. It was loaded on the corresponding pumping part. The heat capacity, the thermal conductivity, the thermal expansion coefficient and the elastic modulus were fully considered. Thus the distribution and the variation of the temperature and the thermal stress were got. There were references for the experiment and design of heat capacity laser.