Effect of Bivalent Alkaline Earth Fluorides Introduction on Thermal Stability and Spectroscopic Properties of Er3+/Tm3+/Yb3+ Co-Doped Oxyfluorogermanate Glasses
HU Yue-bo1, 2, 3, ZHANG Xin-na2, ZHOU Da-li3, JIAO Qing1, WANG Rong-fei1, HUANG Jin-feng2, LONG Xiao-bo2, QIU Jian-bei1*
1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 2. Material Research Center, Kunming Metallurgy College, Kunming 650033, China 3. School of Materials Science and Engineering, Sichuan University, Chengdu 610065 China
Abstract：Transparent Er3+/Tm3+/Yb3+ co-doped oxyfluorogermanate glasses alone containing MgF2, CaF2, SrF2 or BaF2 and nano-glass-ceramics only containing BaF2 were prepared. The thermal stabilities and the up-conversion emission properties of the samples were investigated. Analyses of absorbance spectra reveal that the UV cutoff band moves slightly to shortwave band with the doping bivalent cation mass increasing. The results show that the emission color can be adjusted by changing the alkaline earth cation species in the glass matrixes, especially as Mg2+ is concerned, and the emission intensity can increase notably by heating the glass containing alkaline-earth fluoride into glass ceramic containing alkaline-earth fluoride nanocrystals or increasing the content of bivalent alkaline earth fluorides.
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