Abstract In this work, we have reported on enhanced emission in Ho3+-doped sol-gel high silica glasses by doped Y2O3. Effects of Y2O3/Al2O3 ratio on the structural and optical properties of Ho3+-doped glasses were investigated. According to the analysis of Si 2p3/2 XPS, 27Al NMR, FTIR, it can be concluded that the Y2O3 has greatly changed the structure of the high silica glass. The 27Al NMR spectra showed that the population of Ho3+ ions in the vicinity of Al3+ decreased with an increase in the Y2O3/Al2O3 ratio. Judd–Ofelt parameters have been evaluated from absorption spectrum of Ho3+-doped glass and predicted the high asymmetric coordination environment around Ho3+ when incorporating Y3+ into the glass network. The 2.0-μm fluorescence intensity, fluorescence lifetime and σems × τrad of Ho3+-doped glasses steadily increase with the increase in the ratio of Y2O3/Al2O3. These results suggest that Y2O3 has a good dispersion homogeneity for Ho3+ ions in high silica glass.

中文翻译：

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Y2O3/Al2O3比对Ho3+掺杂溶胶-凝胶高硅玻璃结构和增强发射性能的影响

摘要 在这项工作中，我们报道了掺杂 Y2O3 在 Ho3+ 掺杂的溶胶-凝胶高硅玻璃中增强的发射。研究了Y2O3/Al2O3比例对Ho3+掺杂玻璃结构和光学性能的影响。根据Si 2p3/2 XPS、27Al NMR、FTIR分析，可以得出Y2O3极大地改变了高硅玻璃的结构。27Al NMR 谱表明，随着Y2O3/Al2O3 比值的增加，Al3+ 附近的Ho3+ 离子数量减少。Judd–Ofelt 参数已从掺杂 Ho3+ 的玻璃的吸收光谱中进行评估，并预测了将 Y3+ 加入玻璃网络时 Ho3+ 周围的高度不对称配位环境。2.0-μm 荧光强度，随着 Y2O3/Al2O3 比值的增加，Ho3+ 掺杂玻璃的荧光寿命和 σems × τrad 稳步增加。这些结果表明 Y2O3 对高石英玻璃中的 Ho3+ 离子具有良好的色散均匀性。