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Cooperative upconversion and Yb3+-Er3+ energy transfer in newly developed phosphate glasses were studied in this paper. The cooperative upconversion coefficients of 4I13/2 level for different Er3+ concentrations were deduced from the pump intensity- dependent luminescence decay curves. Yb3+-Er3+ energy transfer efficiencies for different Yb3+ concentrations codoped with Er3+ (approximately 2 X 1020 ions/cm3) were estimated from the lifetime measurements of 2F5/2 level of Yb3+ ions. The small cooperative upconversion coefficients and high Yb3+-Er3+ energy transfer efficiencies indicate these newly developed Er3+ and Yb3+/Er3+ doped phosphate glasses are excellent for amplifier and laser applications.
Bor-Chyuan Hwang,Shibin Jiang,Tao Luo,Lydia Le Neindre,Jason Watson, andNasser Peyghambarian
"Characterization of cooperative upconversion and energy transfer of Er3+ and Yb3+/Er3+ doped phosphate glasses", Proc. SPIE 3622, Rare-Earth-Doped Materials and Devices III, (1 April 1999); https://doi.org/10.1117/12.344510
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Bor-Chyuan Hwang, Shibin Jiang, Tao Luo, Lydia Le Neindre, Jason Watson, Nasser Peyghambarian, "Characterization of cooperative upconversion and energy transfer of Er3+ and Yb3+/Er3+ doped phosphate glasses," Proc. SPIE 3622, Rare-Earth-Doped Materials and Devices III, (1 April 1999); https://doi.org/10.1117/12.344510