The influence of Zn²⁺ ion on the 1.5 渭m laser properties of LiNbO₃ crystal heavily doped with Er³⁺ ion

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• 作者：Yannan Qian ; Rui Wang ; ^{wangrui001@hit.edu.cn} ; Chao Xu ; Wei Xu ; Xiaohong Wu ; Lili Xing ; Yanling Xu
• 关键词：Judd&ndash ; Ofelt ; Fü ; chtbauer&ndash ; Ladenburg ; Gain cross section
• 刊名：Optics and Laser Technology
• 出版年：2012
• 期刊代码：48_00303992
• 类别：ph
• 出版时间：October, 2012
• 卷：44
• 期：7
• 页码：2297-2301
• 文件大小：261 K

摘要

The spectral characteristics of 1.54 渭m emission in a series of Zn/Er:LiNbO₃ crystals with heavy Er content and variable Zn content were reported. The inductively coupled plasma mass spectrometry (ICP-MS) was used to determine the concentration of Er³⁺ ion in the crystal. The absorption and emission spectra of Zn/Er:LiNbO₃ crystals were measured. Based on Judd-Ofelt theory, the spectral parameters such as intensity parameters 惟_t (t=2, 4 and 6), transition strengths, radiative transition probabilities, radiative lifetime and fluorescence branching ratio have been obtained in Zn/Er:LiNbO₃ system. The emission cross section corresponding to ⁴I_13/2鈫?sup>4I_15/2 transition of Er³⁺ ion was obtained according to F眉chtbauer-Ladenburg theory. The gain cross section of Er:LiNbO₃ crystal codoped with 6 mol%Zn²⁺ ions were also discussed in this work.