Spectroscopic characteristics of 1.54 渭m emission in Er/Yb:LiNbO₃ crystals tridoped with In³⁺ ions

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• 作者：Yannan Qian^a ; Rui Wang^a ; ^{wangrui001@hit.edu.cn} ; Chao Xu^a ; Wei Xu^b ; Xiaohong Wu^a ; Chunhui Yang^a
• 关键词：In/Er/Yb ; LiNbO3 crystal ; Judd&ndash ; Ofelt ; Fü ; chtbauer&ndash ; Ladenburg ; Fluorescence lifetime ; Gain cross-section
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：25 June, 2012
• 卷：527
• 期：Complete
• 页码：152-156
• 文件大小：425 K

摘要

A series of Er/Yb:LiNbO₃ crystals tridoped with x mol%In³⁺ ions (x = 1, 2 and 3 mol%) was grown by Czochralski technique. Under 980 nm excitation, the strongest intensity of 1.54 渭m emission was observed for 2 mol%In³⁺-tridoped Er/Yb:LiNbO₃ crystal. The UV-vis-infrared absorption spectra of In/Er/Yb:LiNbO₃ crystals were measured, and Judd-Ofelt (J-O) theory was carried out to predict the J-O intensity parameters (惟_t), radiative lifetime 蟿_rad and fluorescence branching ratio 尾. The emission cross-section of the ⁴I_13/2 鈫?#xA0;⁴I_15/2 transition of Er³⁺ ion was calculated by F眉chtbauer-Ladenburg (F-L) method. The gain cross-section, estimated as a function of the population inversion ratio, allowed us to evaluate a potential laser performance of In/Er/Yb:LiNbO₃ crystal at 1.54 渭m emission. The fluorescence lifetimes of the ⁴I_13/2 鈫?#xA0;⁴I_15/2 transition in In/Er/Yb:LiNbO₃ crystals were measured.