Huang Jianhui, Wang Bo, You Weixiong, Zhang Liaolin, Sun Yijian, Tu Chaoyang, Gong Guoliang, Liu Yao
College of Rare Earths, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, PR China.
School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Sep 5;258:119587. doi: 10.1016/j.saa.2021.119587. Epub 2021 Feb 14.
The YAG single crystals doped with 10 at.%, 20 at.% and 50 at.% Er 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 Er concentration and ∼3.5 μm emission of Er: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 Er concentration. The trend of the emission properties in NIR and visible region with the Er concentration was also discussed and compared. The results indicate that the highly doped Er concentration is beneficial to realize the ∼3.5 µm laser output.
采用微下拉法成功生长出掺杂10原子%、20原子%和50原子%铒的YAG单晶，并对晶体的光谱性质进行了研究。主要关注的是铒浓度与掺铒钇铝石榴石（Er:YAG）晶体约3.5μm发射之间的关系。利用贾德-奥费尔特理论分析了室温吸收光谱。通过富希鲍尔-拉登堡方程计算了受激发射截面。晶体在约3.5μm处的荧光强度和峰值发射截面随铒浓度的增加而略有下降。还讨论并比较了近红外和可见光区域发射特性随铒浓度的变化趋势。结果表明，高掺杂铒浓度有利于实现约3.5μm的激光输出。
