High efficient and broadband similar to 3.5 mu m emission of Er3+:YAG crystal
High efficient and broadband similar to 3.5 mu m emission of Er3+:YAG crystal
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类似于 Er3 :YAG 晶体 3.5 μm 发射的高效率和宽带
DOI：
10.1016/j.saa.2021.119587
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Liu Yao
中科院分区：
文献类型：
--
作者：
Huang Jianhui;Wang Bo;You Weixiong;Zhang Liaolin;Sun Yijian;Tu Chaoyang;Gong Guoliang;Liu Yao
掺杂10at.%的YAG单晶，20原子%和50 at.%采用微下拉法成功地生长了Er ~（3+）晶体，并对其光谱性质进行了研究。本文主要研究了Er ~（3+）：YAG晶体中Er ~（3+）的浓度与3.5 μm发射的关系。用Judd-Ofelt理论分析了室温吸收光谱。受激发射截面由Füchtbauer-Ladenburg方程计算。随着Er 3+浓度的增加，晶体在0.3.5 μm处的荧光强度和峰值发射截面略有下降。讨论并比较了近红外和可见光区发光特性随Er ~（3+）浓度变化的趋势。结果表明，高浓度的Er 3+掺杂有利于实现3.5 μm的激光输出。
The YAG single crystals doped with 10 at.%, 20 at.% and 50 at.% Er3+were successfully grown by the micro-pulling down method and spectroscopic properties of the crystals were investigated. The main interest was focus on the relation between the Er3+concentration and ∼3.5 μm emission of Er3+:YAG crystals. Room temperature absorption spectra were analyzed by the Judd-Ofelt theory. The stimulated emission cross-sections were calculated by the Füchtbauer-Ladenburg equation. The fluorescence intensities and peak emission cross-sections of the crystals at ∼3.5 μm are slightly decreasing with the increase of Er3+concentration. The trend of the emission properties in NIR and visible region with the Er3+concentration was also discussed and compared. The results indicate that the highly doped Er3+concentration is beneficial to realize the ∼3.5 µm laser output.