In this paper, heavy metal oxide glasses co-doped with erbium and holmium ions have been synthesized. Glass composition, based on bismuth and germanium oxides, has been selected in terms of high thermal stability (Delta T = 125 degrees C), high refractive index (n = 2.19) and low maximum phonon energy (h nu(max) = 724 cm(-1)). Up-conversion luminescence spectra under the 980 nm laser diode excitation have been observed as a result of radiative transitions within the quantum energy level structures of Er3+ and Ho3+ ions. Optimization of rare earth ions content has been conducted, the highest emission intensity in the visible wavelength range has been observed in glass co-doped with molar concentration 0.5 Er2O3 / 0.5 Ho2O3.
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Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
Liao, Song-Yi
Yao, Rui
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Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
Yao, Rui
Chen, Xiao-Yu
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Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
Chen, Xiao-Yu
Wang, Guang-Rong
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Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
Wang, Guang-Rong
Zheng, Feng
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Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
Cent South Univ, Phase Diagram & Mat Design Ctr, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China