Up-Conversion Properties of Oxy-Fluoride Glasses Co-Doped with Ho3+ and Yb3+

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Oxy-fluoride glasses with composition of 25SiO2-65PbF2-9.4AlF3-0.1HoF3-0.5YbF3 were prepared. Their up-conversion fluorescence characteristics were investigated by 980 nm laser. Two emission peaks were observed at 540 and 650 nm. The up-conversion mechani
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