摘要
We address the power scaling issue in end-pumped laser rod amplifiers by studying,experimentally and numerically,the magnitude of thermal lensing in a high-energy diode-pumped Yb:YAG crystal.The spatio-temporal temperature profile of the gain medium and the focal length of the induced thermal lens are determined numerically.The influence of the repetition rate and pumping power on the temperature distribution is analyzed.Experimental measurements covered repetition rates between 1 and 10 Hz and up to 4 kW pumping power.
基金
This work is partially supported by the Fundacao para a Ciencia e a Tecnologia(grant agreement No.PD/BD/135222/2017)
has been carried out within the framework of Laserlab-Portugal(National Roadmap of Research Infrastructures,22124)
the European Union Horizon 2020 research and innovation program under grant agreement No.654148 Laserlab-Europe.
