Accurate Characterization of the Properties of the Rare-Earth-Doped Crystal for Laser Cooling
Accurate Characterization of the Properties of the Rare-Earth-Doped Crystal for Laser Cooling
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DOI：
10.3390/app12094447
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Jianping Yin
中科院分区：
文献类型：
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作者：
Xuelu Duan;Biao Zhong;Yongqing Lei;Chaoyu Wang;Jiajin Xu;Ziheng Zhang;Jingxin Ding;Jianping Yin
We present a method for calibrating a commercial thermal camera adopted to accurately measure the temperature change of the sample in a laser-induced temperature modulation spectrum (LITMoS) test, which is adopted for measuring two crucial parameters of the external quantum efficiency ηext and the background absorption coefficient αb for assessing the laser cooling grade of the rare-earth-doped materials. After calibration, the temperature resolution of the calibrated thermal camera is better than 0.1 K. For the cooling grade Czochralski-grown 5% Yb3+:LuLiF4 crystal, the corresponding values of ηext and αb are LITMoS = measured to be ηext=99.4 (±0.1)% and αb=1.5 (±0.1)×10−4 cm−1, respectively.
