We present detailed experimental results with cryogenic Yb:YLF gain media in rod-geometry. We have comparatively investigated continuous-wave (cw) lasing and regenerative amplification performance under different experimental conditions. In the cw lasing experiments effect of crystal doping, cw laser cavity geometry and pump wavelength on lasing performance were explored. Regenerative amplification behavior was analyzed and the role of depolarization losses on performance was investigated. A recently developed temperature estimation method was also employed for the first time in estimating average crystal temperature under lasing conditions. It is shown that the thermal lens induced by transverse temperature gradients is the main limiting factor and strategies for future improvements are discussed. To the best of our knowledge, the achieved results in this study (375 W in cw, and 90 W in regenerative amplification) are the highest average powers ever obtained from this system via employing the broadband E//a axis.

我们用杆几何中的低温Yb：YLF增益介质呈现详细的实验结果。我们已经比较研究了在不同实验条件下的连续波（cw）激光和再生放大性能。在连续激光实验中，研究了晶体掺杂，连续激光腔几何形状和泵浦波长对激光性能的影响。分析了再生放大行为，并研究了去极化损耗对性能的影响。在激光条件下估计晶体平均温度时，也首次采用了最新开发的温度估计方法。结果表明，横向温度梯度引起的热透镜是主要的限制因素，并讨论了未来的改进策略。据我们所知，