Improvement of 1.53 ¦Ìm band fluorescence and energy transfer in Er³⁺/Ce³⁺ codoped tellurite glasses

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• 作者：Shichao Zheng ; ^{zsc13792889163@163.com} ; Yaxun Zhou ; Dandan Yin ; Xingchen Xu ; Yawei Qi ; Shengxi Peng
• 关键词：Tellurite glass ; Er3+/Ce3+ codoping ; 1.53  ; ¦Ìm band fluorescence ; Energy transfer ; Thermal stability
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：25 July, 2013
• 年：2013
• 卷：566
• 期：Complete
• 页码：90-97
• 全文大小：1272 K

文摘

The high phonon-energy oxide of B₂O₃ was introduced into the Er³⁺/Ce³⁺ codoped tellurite glasses with composition of TeO₂-ZnO-Na₂O to improve the 1.53 ¦Ìm band fluorescence intensity of Er³⁺ and thermal stability of glass hosts. To evaluate the effect of B₂O₃ component on the fluorescence properties of Er³⁺ and thermal stability of glass hosts, the absorption spectra, upconversion emission spectra, fluorescence emission spectra, fluorescence lifetimes, Raman spectra and differential scanning calorimeter (DSC) curves of glass samples were measured and investigated, respectively. It is shown that the introduction of an appropriate amount of B₂O₃ component can further improve the 1.53 ¦Ìm band fluorescence intensity through an enhanced phonon-assisted energy transfer between Er³⁺ and Ce³⁺ ions, and the energy transfer mechanism is investigated quantitatively in detail by calculating energy transfer micro-coefficients and phonon contributions. Furthermore, the thermal stability of glass hosts increases with the B₂O₃ component amount, and meanwhile relevant spectroscopic parameters and quantum transition efficiencies of Er³⁺ are calculated and analyzed using Judd-Ofelt theory. The present results indicate that the prepared Er³⁺/Ce³⁺ codoped tellurite glass with an appropriate amount of B₂O₃ component has good prospect as a gain medium applied for 1.53 ¦Ìm band broad and high-gain EDFA.