用高温熔融法制备了系列掺铒铋硼锗酸盐玻璃,测试分析了不同铒离子掺杂浓度下玻璃样品的吸收光谱和荧光光谱。结果显示,掺铒铋硼锗酸盐玻璃中存在着强烈的荧光俘获和浓度猝灭效应。随着铒离子掺杂浓度的增加,1.53μm波段荧光谱展宽,1560 nm波长处荧光次峰相对增强。对此用一个等效的四能级模型予以了定性分析。同时,随着铒离子掺杂浓度的增加,⁴I_13/2能级荧光寿命和1.53μm波段荧光强度呈现出先增加后减小趋势。依据Dexter能量转移理论,计算了该玻璃系统中铒离子发生浓度猝灭的临界距离R₀及相互作用参数C_Er-Er,并与其它玻璃基质进行了比较。

A serial of Er₂O₃-doped bismuth-boron-germanium glasses with composition of Bi₂O₃-B₂O₃-GeO₂-Na₂O were prepared by the high-temperature melt-quenching method.And the absorption spectra and fluorescence emission spectra were measured and investigated as a function of erbium ion doping concentration.It is found that there are intense radiation trapping and concentration quenching effect in erbium-doped Bi₂O₃-B₂O₃-GeO₂-Na₂O glasses.With the increase of erbium ion doping concentration,the 1.53 μm fluorescence emission spectrum broadens and the sub-emission peak at 1 560 nm increases,which is analyzed qualitatively with a four-level equivalent model.At the same time,the fluorescence lifetime of ⁴I_13/2 level and the fluorescence intensity at 1.53 μm increase at first,and then decrease with the increase of erbium ion concentration.On the basis of the energy migration model of Dexter theory,the critical distance R₀ for concentration quenching happening and the interaction microparameter C_Er-Er were determined.The value of C_Er-Er in the Er₂O₃-doped Bi₂O₃-B₂O₃-GeO₂-Na₂O glasses was compared with that in other glass hosts.