文章基本信息

标题：Mid-infrared fluorescence, energy transfer process and rate equation analysis in Er3+ doped germanate glass
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作者：Tao Wei ; Ying Tian ; Fangze Chen 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep06060
语种：English
出版社：Springer Nature
摘要：Er³⁺ doped Y₂O₃ and Nb₂O₅ modified germanate glasses with different Er³⁺ concentrations were prepared. J-O intensity parameters were computed to estimate the structural changes due to the additions of Y₂O₃ and Nb₂O₅. The main mid-infrared spectroscopic features were investigated. To shed light on the observed mid-infrared radiative behavior, 975 nm and 1.53 μm emission spectra along with their decay lifetimes were also discussed. Moreover, the energy transfer processes of ⁴I_11/2 and ⁴I_13/2 level were quantitatively analyzed. In view of the experimental lifetimes, the simplified rate equation was utilized to calculate the energy transfer upconversion processes of upper and lower laser level of 2.7 μm emission. The theoretical calculations are in good agreement with the observed 2.7 μm fluorescence phenomena. Finally, the stimulated emission and gain cross sections were calculated and the results indicate that Er³⁺ doped germanate glasses have great potential for mid-infrared application.