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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。
The dynamic optical distortion of laser medium under heat capacity mode is studied. The influence of temperature gradient, photoelastic effect and deformation of medium end face on the whole wavefront distortion is analyzed. The optical distortion is transformed into the cavity loss. The numerical simulation of the heat The results show that when the operating temperature of the laser is less than 400 K, the power loss caused by the Boltzmann distribution of the number of particles can be neglected. The dynamic thermal effect is the dependence of the output power of the heat capacity laser The reason for the rapid decline in time.