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- W2024794805 abstract "Abstract Er 3+ single doped and Er 3+ /Tm 3+ co-doped tellurite glasses with composition of TeO 2 –ZnO–Na 2 O were prepared by the melt-quenching method, and the absorption and fluorescence spectra were measured. The intensity parameters Ω t ( t = 2, 4, 6), spontaneous radiative transition rates A , fluorescence branching ratios β and radiative lifetimes τ rad of Tm 3+ ions were calculated from the measured absorption spectra based on the Judd–Ofelt theory, and the luminescence properties of samples with different doped concentration of Er 3+ –Tm 3+ ions were investigated from the measured fluorescence emission spectra under the 800 nm LD excitation. It was shown that the 1.53 μm fluorescence emission intensity of Er 3+ ions decreases with the increasing of Tm 3+ ion doped concentration, while the 1.85 μm fluorescence emission intensity of Tm 3+ ions increases accordingly. The energy transfer mechanisms between Er 3+ and Tm 3+ ions were investigated to explain the fluorescence varying behavior, and it indicates that phonon-assisted non-resonant energy transfers from Er 3+ to Tm 3+ ions play a very important role in the 1.85 μm fluorescence emission of Tm 3+ ions. The energy transfer coefficient and phonon contribution for the existed energy transfer process between Er 3+ and Tm 3+ ions were calculated and analyzed. Meanwhile, the 1.85 μm band stimulated absorption, emission cross-sections and gain coefficient of Tm 3+ : 3 F 4 → 3 H 6 transitions were also obtained and analyzed. The research shows that Er 3+ /Tm 3+ co-doped TeO 2 –ZnO–Na 2 O glass is a promising host material applied for 1.85 μm band solid lasers and amplifiers." @default.
- W2024794805 created "2016-06-24" @default.
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- W2024794805 date "2013-04-01" @default.
- W2024794805 modified "2023-10-02" @default.
- W2024794805 title "Luminescence properties and energy transfer mechanism of Er3+/Tm3+ co-doped tellurite glasses" @default.
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- W2024794805 doi "https://doi.org/10.1016/j.jallcom.2012.12.026" @default.
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