掺铒铋基玻璃的荧光俘获和浓度猝灭效应研究  

Investigation of Radiation Trapping and Concentration Quenching in Erbium-doped Bismuth-based Glasses

作　　者：盖娜[1] 周亚训[1] 戴世勋[1] 徐铁峰[1] 聂秋华[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《光电工程》2008年第10期58-62,共5页Opto-Electronic Engineering

基　　金：浙江省自然科学基金(Y107070);宁波市自然科学基金(2006A610026);宁波大学王宽城幸福基金资助项目

摘　　要：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,4I13/2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CEr-Er,并与其它玻璃基质进行了比较。A serial of Er203-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 um 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 4113/2 level and the fluorescence intensity at 1.53 um 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 CEr.Er were determined. The value of CEr-Er in the Er203-doped Bi203-B203-GeO2-Na2O glasses was compared with that in other glass hosts.

关 键 词：铋硼锗酸盐玻璃 1.53/am波段荧光 荧光俘获 浓度猝灭 

分 类 号：TQ171.112[化学工程—玻璃工业]