Er3+/Yb3+共掺TeO2-WO3-Bi2O3玻璃的光谱性质和上转换发光

本文制备了Er³⁺/Yb³⁺共掺TeO₂-WO₃-Bi₂O₃(TWB)玻璃. 测试和分析了样品的吸收光谱、荧光光谱及上转换发光. 用Judd-Oflet(J-O)理论计算了Er³⁺在玻璃样品中的光谱强度参数,随着Bi₂O₃含量的增加,Ω₂增加,Ω₄ 关键词： 碲酸盐玻璃 光谱性质 上转换

Spectroscopic properties and up-conversion luminescence Er3+/Yb3+ co-doped TeO2-WO3-Bi2 O3 glass

Er^{3 +} /Yb^{3 +} co-doped TeO₂-WO₃-Bi₂O₃ (TWB) glass has been prepared.The absorption spectra, fluorescence spectra and up-conversion luminescence of the glass were measured. The strength parameters of Er³⁺ in glass were calculated according to the Judd-Oflet theory. Along with Bi₂O₃ content increasing, Ω₂ increases, Ω₄, and Ω₆ gradually decrease. The broad 1.5 μm fluorescence was observed under 976 nm excitation, and its full width at half maximum (FWHM) was 96 nm. The stimulated emissiow was calculated using the McCumber theory, and the peak emission cross-section was 0.70 × 10^-20cm² at 1.5 μm. The product of stimulated emission cross section and fluorescence of FWHM was 60.2 cm² nm. At the same time, there is an obvious phenomenon of fluorescence up-conversion of Er^{3 +}/Yb^{3 +} co-doped TeO₂-WO₃-Bi₂O₃ glass under 976 nm pump, and the intensity of the conversion gradually weakened with the increasing of Bi₂O₃ content.