Er^3＋／Ce^3＋共掺Bi2O3-B2O3-SiO2玻璃光谱性质研究  

Optical Spectroscopy of Er^3＋/Ce^3＋ Codoped Bi2O3-B2O3-SiO2 Glasses

作　　者：王训四[1] 聂秋华[1] 徐铁峰[1] 戴世勋[1] 沈祥[1] 

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《武汉理工大学学报》2007年第E01期228-233,共6页Journal of Wuhan University of Technology

基　　金：国家自然科学基金（60677015）和宁波市自然科学基金（2006A610020）

摘　　要：制备了玻璃组分Er^3＋／Ce^3＋共掺15SiO2-（85-X）Bi2O3-XB2O3-1wt％Er2O3-Ywt．％CeO2（X=0，5，10，15，20，Y=0，2）系列样品；测试了样品的物理性质和光谱性质；应用fudd—Ofelt理论和Weber理论分析了玻璃中Er^3＋，Ce^3＋离子间声子辅助能量转移（PAT）效率和及其影响因素，讨论玻璃基质中B2O3含量改变引起的声子能量变化对Er3＋离子荧光发射特性的影响，同时研究Ce^3＋的掺入对Er^3＋掺杂的铋硼硅酸盐光谱性质的影响。结果表明在特定的B2O3和合适的Ce^3＋掺杂浓度时，Er^3＋。^4I11／2→^413／2与Ce^3＋：^2F5／2→^2F7／2之间的声子辅助能量转移（PAT）率出现一个峰值，与玻璃基质中所测得的声子能量最佳值相匹配，验证声子辅助下的Er^3＋／Ce^3＋间能量转移的有效性。提高Er^3＋离子Er^3＋：^4I11／2→^413／2能级跃迁中的驰豫率，进而提高Er^3＋在1.5μm波段的荧光发射特性。Er^3＋/Ce^3＋ codoped 15SiO2-（85- X）Bi2O3-XB2O3-1 wt% Er203-Ywt%CeO2（X=0,5,10,15,20, Y=0,2） glasses were prepared. The physical and spectroscopic properties of Er^3＋/Ce^3＋ codoped SiCh-Bi2O3-B2O3 were studied. Then, it is analysed on the phonon-assist energy transfer （PAT） between the Er^3＋ and Ce^3＋ based on the theory of the Weber to the host glass phonon energy and rare earth ions energy transition. Then, the nonradiative rate, the lifetime of the ^4I11/2→^4I13/2 transition, and the emission intensity and bandwidth of the 1.5/ma luminescence with the ^4I13/2→^4I15/2 transition of Er^3＋ are discussed in detail. The results show that the optical parameters of Er^3＋ in this bismuth-horate-silicate glass come to an optimum value to the energy-transfer rate between Er^3＋ ： ^4I11/2→^413/2 and Ca^3＋ ： ^2F5/2→^2F7/2, as there is good match of the host glass phonon energy after B203 is introduced, and it proves the validity of the PAT process.

关 键 词：铋酸盐玻璃 能量转移 PAT过程 声子能量 

分 类 号：TQ171.71[化学工程—玻璃工业]