Abstract

${\mathrm{Tm}}^{3+}/{\mathrm{Yb}}^{3+}$ codoped transparent glass ceramic containing $\beta \text{-}{\mathrm{PbF}}_2$ nanocrystals was successfully prepared. After thermal treatment, emissions from the ${{}^{1}G}_4$ state of ${\mathrm{Tm}}^{3+}$ excited by 980 nm laser were greatly quenched by cross relaxation and the 700 nm luminescence from ${\mathrm{Tm}}^{3+}:{}^3{F}_{2,3}\to {}^3{H}_6$ transition was strongly enhanced. A nearly monochromatic red luminescence band was observed. Based on the luminescence decay curves and Judd–Ofelt analysis, the strengthened cross relaxation played an important role in such phenomenon.

©2012 Optical Society of America

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