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Effect of alkali metal oxides on upconversion fluorescence properties of germanate-tellurite glasses

机译:碱金属氧化物对锗酸盐-碲酸盐玻璃上转换荧光性能的影响

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摘要

Upconversion emissions of Yb3VEr -eodoped germanate-tellurite glasses have been investigated upon the excitation of 980 nm laser diode (LD). It is found that up- conversion taminescence intensities significantly increase with the increasing size of alkali metal ions, Raman spectra show that the maximum phonon energies (MPE) of glass hosts are unchanged with the replacement of alkali metal oxides, indicating that MPE is not the reason for the increase of upconversion fluorescence intensities. The analysis of the non-radiative transition of Er~(3+) demonstrates that the de crease of the energy phonon density is the main reason for the enhanced fluorescence intensities.
机译:Yb3VEr掺杂的锗酸盐-碲酸盐玻璃的上转换发射是在980 nm激光二极管(LD)的激发下进行的。已发现,随着碱金属离子尺寸的增加,上转换发光强度显着增加,拉曼光谱表明,取代碱金属氧化物后,玻璃基质的最大声子能(MPE)不变,表明MPE不是上转换荧光强度增加的原因。对Er〜(3+)非辐射跃迁的分析表明,能量声子密度的降低是荧光强度增强的主要原因。

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