中文摘要：

采用高温熔融退火法制备了系列80TeO2—10Bi2O3-10TiO2—0．5Er2O3-χCe2O3（χ=0，O．25，0．5，0．75，1．0m01％）和（80-y）TeO2-10Bi2O3-10TiO2-yWO3—0．5Er2O3—0．75Ce2O3（y=3，6，9，12m01％）的碲铋酸盐玻璃．测试了玻璃样品400-1700nm范围内的吸收光谱，975nm抽运下的上转换发光谱和1．53μm波段荧光谱，以及808nm激励下的Er^3＋离子荧光寿命和无掺杂玻璃样品的Raman光谱，并结合Judd—Ofelt理论和McCumber理论计算了Er^3＋离子光谱参数．结果表明，在掺Er0＋碲铋酸盐玻璃中引入Ce^3＋离子进行Er^3＋／Ce^3＋共掺，通过Er^3＋离子4Ⅰ^11／2能级与ce^3＋离子2^F5／2能级间基于声子辅助的能量传递过程，可以有效抑制Er^3＋离子上转换发光并明显增强其1．53μm波段荧光；同时，在现有Er^3＋／Ce^3＋共掺玻璃组分基础上引入W03，可进一步提高1．53μm波段荧光并展宽其荧光发射谱．研究结果对于获取优异光谱特性的宽带掺Er^3＋叶光纤放大器玻璃基质具有实际意义．

英文摘要：

A series of 80TeO2-10Bi2O3-10TiO2-0.5Er2O3-χCe2O3 （χ = 0, 0.25, 0.5, 0.75, 1.0 mol%） and （80-y） TeO2-10Bi2O3-10TiO2- yWO3-0.5Er2O3-0.75Ce2O3 （y = 3, 6, 9, 12 mol%） tellurite-bismuth glasses are prepared by the conventional high-temperature melt- ing and annealing method. The absorption spectra of 400----1700 nm, upconversion spectra and 1.53μm band fluorescence spectra under the excitation of 975 nm, the 4Ⅰll/2 and 4Ⅰ13/2 level fluorescence lifetimes of Era＋ under the excitation of 808 nm, and the Ra- man spectra of doping-free glass samples are measured. Meanwhile, the spectroscopic parameters of Er^3＋ are calculated and analyzed with the help of Judd-Ofelt theory and McCumber theory. The results indicate that the upconversion fluorescence can be suppressed efficiently and the 1.53 μm band fluorescence can be enhanced evidently, owing to the energy transfer from Er^3＋： 4Ⅰ11/2→Ce^3＋： 2^F5/2 levels when the Cea＋ ions are introduced into the Er^3＋-doped tellurite-bismuth glasses. Moreover, the 1.53 μm band fluores- cence intensity can be improved and the fluorescence spectral width can be broadened further when an appropriate amount of WO3 component is introduced. The above research results are of theoretical significance for obtaining the tellurite-bismuth glasses with excellent spectroscopic properties, which are used for the 1.53 μm broadband Erbium-doped optical fiber amplifier.