Abstract

We report on near-infrared to visible upconversion luminescence in transparent ${\mathrm{Eu}}^{3+}$-doped $\mathrm{SrO}–{\mathrm{TiO}}_2–{\mathrm{SiO}}_2$ glass–ceramics. X-ray diffraction analysis indicates that ${\mathrm{Sr}}_2{\mathrm{TiSi}}_2{\mathrm{O}}_8$ crystallites are precipitated in the glass after heat treatment at $850°\mathrm{C}$ for $2\mathrm{h}$. The ${\mathrm{Eu}}^{3+}$-doped glass–ceramics show strongly enhanced upconversion luminescence and greatly improved damage threshold compared with the as-prepared glass. The mechanisms of the observed phenomena are discussed.

© 2007 Optical Society of America

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