1. Tm3+ doped Bi2O3–GeO2–Na2O glasses for 1.8μm fluorescence
- Author
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Fan, Huiyan, Gao, Guojun, Wang, Guonian, Hu, Junjiang, and Hu, Lili
- Subjects
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BISMUTH compounds , *RARE earth ions , *GLASS , *FLUORESCENCE , *REFRACTIVE index , *CRYSTALLIZATION , *ABSORPTION spectra , *CROSS-sectional method , *RADIATIVE transitions - Abstract
Abstract: 53.3BiO1.5–33.3GeO2–13.4NaO0.5 (cation%) glasses with various Tm3+ concentration were prepared by melt-quenching method. These glasses show high density, high refractive index, low phonon energy and good stability against crystallization. Absorption spectra of Tm3+-doped bismuthate glass were measured to obtain the radiative lifetimes by Judd-Ofelt theory. The absorption (4.5×10−21 cm2) and emission (6.7×10−21 cm2) cross-sections were calculated by Beer–Lambert and McCumber theory. The results show that the Tm3+ (3F4 → 3H6) in these glasses have high spontaneous radiative transition probabilities and large stimulated emission cross-section. Then the fluorescence emission spectra were measured under 808nm excitation and the maximum emission intensity at 1.8μm is obtained at 0.9mol% Tm2O3 in the glasses. [Copyright &y& Elsevier]
- Published
- 2010
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