Effect of alkali metal oxides on upconversion fluorescence properties of germanate-tellurite glasses  

作　　者：YANGZhongmin JIANGZhonghong 

机构地区：[1]InstituteofOpticalCommunicationMaterials,SouthChinaUniversityofTechnology,Guangzhou510641,China [2]KeyLabofSpeciallyFunctionalMaterialsandAdvancedManufacturingTechnology,MinistryofEducation,Guangzhou510641,China

出　　处：《Chinese Science Bulletin》2004年第24期2572-2574,共3页

摘　　要：Upconversion emissions of Yb3+/Er3+-codoped germanate-tellurite glasses have been investigated upon the excitation of 980 nm laser diode (LD). It is found that up- conversion luminescence intensities significantly increase with the increasing size of alkali metal ions. Raman spectra show that the maximum phonon energies (MPE) of glass hosts are unchanged with the replacement of alkali metal oxides, indicating that MPE is not the reason for the increase of upconversion fluorescence intensities. The analysis of the non-radiative transition of Er3+ demonstrates that the de- crease of the maximum energy phonon density is the main reason for the enhanced fluorescence intensities.Upconversion emissions of Yb3+/Er3+-codoped germanate-tellurite glasses have been investigated upon the excitation of 980 nm laser diode (LD). It is found that up- conversion luminescence intensities significantly increase with the increasing size of alkali metal ions. Raman spectra show that the maximum phonon energies (MPE) of glass hosts are unchanged with the replacement of alkali metal oxides, indicating that MPE is not the reason for the increase of upconversion fluorescence intensities. The analysis of the non-radiative transition of Er3+ demonstrates that the de- crease of the maximum energy phonon density is the main reason for the enhanced fluorescence intensities.

关 键 词：荧光特性 锗酸盐 亚碲酸盐 玻璃 碱性氧化物 合成工艺 

分 类 号：TQ171.71[化学工程—玻璃工业]