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The Yb3+/Er3+ co-doped TeO2-WO3-ZnO glasses bubbling with different times were prepared. The infrared (IR) transmission spectra, emission spectra and fluorescence lifetime of Er3+ at 1.5 um were measured. The quench effects of OH groups on emission intensity of Er3+ at 1.5 um as well as the relationships between fluorescence decay rate and OH group content were investigated. The constant kOH-Er which represents the strength of the interactions between Er3+ ions and OH groups, is approximately 17.0×10-20 cm4/s, and is comparable to that for Er3+ in Yb3+/Er3+ co-doped phosphate glasses. 相似文献
4.
在Er3+/Yb3+共掺TeO2-WO3-ZnO玻璃中引入Ce3+,研究了Ce3+对Er3+1.5μm发射性能及其上转换发光性能的影响.结果表明,随Ce3+浓度的增加Er3+1.5μm波段的荧光强度先增强后降低,优化的Ce3+掺杂浓度在2.07×1020/cm3左右;1.5μm波段的荧光寿命则随Ce3+浓度的增加有轻微降低,从3.4ms降到3.0ms,但Ce3+浓度的增加对1.5μm波段的荧光半高宽基本无影响;Er3+/Ce3+间的交叉弛豫Er3+(4I11/2+Ce3+(2F5/2→Er3+(4I13/2+Ce3+(2F7/2使玻璃的上转换发光强度大大降低,但在过高的Ce3+浓度下,Er3+/Ce3+间的另一交叉弛豫Er3+(4I13/2+Ge3+(2F5/2→Er3+(4I15/2+Ce3+(2F7/2则使Er3+4I13/2能级粒子数减少,导致1.5μm波段荧光强度和荧光寿命降低. 相似文献
5.
Er^3 -doped TeO2-WO3-ZnO glasses were prepared and the absorption spectra, emission spectra and fluorescence lifetimes were measured. With more Te02 content in the glasses, the emission full width at half maximum (FWHM) increases while the lifetime of the ^4I13/2 level of Er^3 decreases. The stimulated emission cross-sectionof Er^3 calculated by the McCumber theory is as large as 0.86pm^2. The product of the FWHM and the emissioncross-section σe of Er^3 in TeO2-WO3-ZnO glass is larger than those in other glasses, which indicates that the glasses are promising candidates for Er^3 -doped broadband amplifiers. The Judd-Otfelt parameter Ω6 shows close composition dependence of the 1.5μm emission bandwidth. The more the TeO2 content is, the larger thevalues of Ω6 and FWHM. 相似文献
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