Unexpected temperature rise in end-pumped Nd3+:YAG composite slab laser |
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| Authors: | Liang Liu Xiaobo Wang Shaofeng Guo Haiyan Li Youjin He |
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| Affiliation: | 1. Department of Control Engineering, Naval Aeronautical and Astronautical University, Shandong Yantai 264001, China;2. Opto-electronic Science and Engineering College, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Unexpected temperature rise is observed in end-pumped YAG–Nd3+:YAG–YAG slab laser experimentally. The measured optical absorption spectrum of undoped YAG in 780–830 nm indicates an absorption coefficient of 0.015 cm?1 at 808 nm. The influence of the weak absorption on temperature distribution in end-pumped composite slabs is analyzed numerically and a good agreement with infrared measurement is achieved. The results of finite element analysis show that longer heat sinks and wider slabs bring lower temperature. |
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