Abstract
Optically transparent Er3+/Yb3+ codoped glass ceramics based on the system 60TeO2-10CaF2-25H3BO3-1Er2O3-4Yb2O3 have been successfully prepared by melt-quenching method at 900 ℃.The Er2Te5O13 nanocrystals,whose phonon energy was 886 cm-1 by Raman measurement,were characterized by XRD and TEM in the tellurite glass ceramics.Both up-conversion and down-conversion emission spectra were measured.The red and green emissions have different luminescent processes under different excitation sources.The energy transfer processes were discussed individually.
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