掺Er^(3+)铋酸盐玻璃的荧光光谱分析  

Fluorescence Spectrum Analysis of Erbium-doped Bismuth-based Glass

作　　者：杨建虎[1] 戴世勋[1] 戴能利[1] 温磊[1] 胡丽丽[1] 姜中宏[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光谱学与光谱分析》2003年第6期1065-1068,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(60207006);上海市光科技项目(022261046)资助项目

摘　　要：研究了Er^(3+)离子在铋酸盐玻璃中的荧光光谱性质,应用Judd-Ofelt理论计算了铋酸盐玻璃中Er^(3+)离子的强度参数Ω_t(t=2,4,6)及~4I_(13/2)→I_(15/2)跃迁的谱线强度比值Sed/(Sed+Smd),给出了铋酸盐玻璃中Er^(3+)离子具有宽带发射的结构性解释,表明了Er^(3+)离子周围晶体场强度与Sed/(Sed+Smd)间存在的反比关系。The fluorescence spectra of Er3+ in bismuth-based glass were analyzed in this work. From the structural properties the strength parameters, Omega(t) ( t = 2, 4, 6), and line strengths of I-4(13/2)--> I-4(15/2) transition of Er3+ were calculated according to the Judd-Ofelt theory. The results show that Er-O bond has much weaker covalency in bismuth-based glass than that in other glass hosts. With the increase of B2O3 content, the covalency of Er-O bond becomes weaker, the Omega(6) parameter and S-ed / (S-ed + S-md) ratio increase monotonously, the crystal field strength around Er3+ ion sites becomes weaker, the variation in crystal field around Er3+ ion from site to site becomes greater which leads to a more inhomogeneous distribution of Er3+ sites, then leading to a more inhomogeneous broadening of the spectra, and the FWHM parameter of I-4(13/2) --> I-4(15/2) transition of Er3+ ion becomes broader accordingly. Furthermore, a relationship between the crystal field around Er3+ sites and the line strength of I-4(13/2)--> I-4(15/2) transition of Er3+ ion was found that the former is inversely proportional to the latter, which gives ways for researchers to evaluate the crystal field strength around Er3+ site more easily.

关 键 词：掺铒玻璃 铋酸盐玻璃 荧光光谱分析 宽带放大器 光纤基质材料 晶体场强度 结构特征 

分 类 号：TQ171[化学工程—玻璃工业] TN25[化学工程—硅酸盐工业]