Er^3＋掺杂的锗铋酸玻璃光谱性质的研究

Spectroscopic Properties of Er^(3+)-Doped Germanium Bismuthate Glass

制备了一种新型掺Er3+锗铋酸盐玻璃。分析了吸收光谱和上转换荧光光谱,并应用Judd-Ofelt理论计算了锗铋酸盐玻璃的3个强度参量tΩ(t=2,4,6),分别为Ω2=3.35×10-20cm2,Ω4=1.34×10-20cm2以及Ω6=0.67×10-20cm2。研究了在两种不同的激发光下(980和808 nm)锗铋酸盐玻璃的发光机制。根据McCumber理论,分析了在1.55μm光通讯窗口的光谱性质,计算了能级4I13/2→4I15/2跃迁的受激发射截面,结果显示掺Er3+锗铋酸盐玻璃具有较宽的荧光半高宽和较大的受激发射截面。因此有希望成为高效的上转换发光材料和1.55μm光通讯材料。

Er^3＋-Doped Germanium Bismuthate Glass was fabricated and characterized. The absorption spectrum and up-conversion spectrum of glass were studied. The Judd-Oflet intensity parameters Ωt（t=2, 4, 6）, determined based on Judd-Ofelt theory, were found to be Ω2 = 3. 35 X 10^-20 cm^2 , Ω4 = 1.34 X 10^-20 cm^2 , Ω6 = 0. 67 X 10^-20 cm^2. Frequency up-conversion of Er^3＋- doped germanium bismuthate glass has been investigated. The up-conversion mechanisms are discussed under 808 nm and 980 nm excitation. Stimulated emission cross-section of 4 I13/2→4I15/2 transition was calculated by McCumber theory. Compared to other host glasses, the emission property of Er3＋-doped germanium bismuthate glasses has advantage over those of silicate, phosphate and germinate glasses. Er^3＋-doped germanium bismuth glasses are promising upconversion optical and optic-communication materials.