21 July 2010 Compositional dependence of up-conversion emission and optical transition in Yb3+-Ho3+ co-doped tellurite-phosphate glasses
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Proceedings Volume 7749, 2010 International Conference on Display and Photonics; 77490E (2010) https://doi.org/10.1117/12.869470
Event: 2010 International Conference on Display and Photonics, 2010, Nanjing, China
Abstract
Optical absorption and photoluminescence properties of Yb3+-Ho3+ co-doped tellurite-phosphate glasses have been investigated. Up-conversion emissions have been observed at 540nm (green) and 650nm (red) at room temperature. The effect of host composition on up-conversion luminescence has been studied by analyzing the phenomenological Judd-Ofelt parameters Ωλ (λ = 2,4,6) as well as radiative transition probability and emission cross sections of 5F4 (5S2) and 5F5 levels in these glasses samples. Obtained data indicated that the green transition rapidly decreased relative to the red transition with increasing phosphate concentration, which can be attributed to increasing population of 5F4 (5S2) and 5F5 levels due to increasing host phonon energy. So, the color of up-conversion emission can be modulated by changed host composition. The effect of Ho3+ concentration on up-conversion emission was also studied in Yb3+-Ho3+ co-doped tellurite glasses. The red transition rapidly decreased relative to the green transition with increasing Ho3+ concentration. We attributed it to the lower phonon energy of tellurite glass host.
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Yanmin Yang, Wei Zhang, Shuqing Guo, Zhiping Yang, "Compositional dependence of up-conversion emission and optical transition in Yb3+-Ho3+ co-doped tellurite-phosphate glasses", Proc. SPIE 7749, 2010 International Conference on Display and Photonics, 77490E (21 July 2010); doi: 10.1117/12.869470; https://doi.org/10.1117/12.869470
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