A time-dependent model of laser amplification in an Yb : YAG crystal is considered based on a system of balance equations, as well as radiation transfer and heat conduction equations. The model also takes into account the dependence of the laser characteristics of the gain medium on the injection wavelength and the effect of amplified spontaneous emission. This model is verified based on a diode-pumped amplifier with cryogenic cooling of active elements. The dependences of the gain on the pump pulse energy are experimentally measured for different amplification regimes and compared with simulation results.

中文翻译：

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Yb 中的激光放大：具有显着温度梯度的 YAG 有源反射镜

Yb : YAG 晶体中激光放大的时间相关模型被认为是基于平衡方程系统以及辐射传递和热传导方程。该模型还考虑了增益介质的激光特性对注入波长的依赖性以及放大的自发辐射的影响。该模型基于二极管泵浦放大器进行验证，该放大器对有源元件进行低温冷却。增益对泵浦脉冲能量的依赖性是针对不同放大机制通过实验测量的，并与模拟结果进行比较。