热容模式下激光介质的动态光学畸变

 开展了热容模式下激光介质动态光学畸变研究，初步分析了温度梯度、光弹效应及介质端面变形对整个波前畸变带来的影响，并将光学畸变转化为谐振腔损耗，数值模拟了热容激光器输出功率随时间的变化规律，模拟结果表明：当激光器工作温度低于400 K时，由粒子数玻耳兹曼分布引起的功率下降可以忽略，动态热效应是实验中热容激光器输出功率随时间快速下降的原因。

Dynamic optical distortion of laser medium in heat-capacity laser

In this paper,a theoretical model of the optical transmission was established to study the optical distortion resulted from the dynamic thermal effect.Numerical simulation shows that the optical distortion is mainly caused by the uniformity deformation of the end plane.In order to analyze how the dynamics thermal effect worked on the energy output,numerical calculation on the process of energy conversion in unsteady state was done,and the simulated result matched the experimental result precisely,which also showed that Boltzmann distribution of particle number was not the main reason for the rapid decline of output power when the temperature was under 400 K.The main reason of the rapid decline of output power was the deflection dissipation resulted from dynamic optical distortion.