Abstract

${\mathrm{Ce}}^{3+}$ and ${\mathrm{B}}_2{\mathrm{O}}_3$ are introduced into erbium-doped ${\mathrm{Bi}}_2{\mathrm{O}}_3–{\mathrm{SiO}}_2$ glass to enhance the luminescence emission and optic spectra characters of ${\mathrm{Er}}^{3+}$. The energy transfer from ${\mathrm{Er}}^{3+}$ to ${\mathrm{Ce}}^{3+}$ will obviously be improved with the phonon energy increasing by the addition of ${\mathrm{B}}_2{\mathrm{O}}_3$. Here, the nonradiative rate, the lifetime of the ${}^{4}I_{11∕2}\to {}^{4}I_{13∕2}$ transition, and the emission intensity and bandwidth of the $1.5\mathrm{\mu }\mathrm{m}$ luminescence with the ${}^{4}I_{13∕2}\to {}^{4}I_{15∕2}$ transition of ${\mathrm{Er}}^{3+}$ are discussed in detail. The results show that the optical parameters of ${\mathrm{Er}}^{3+}$ in this bismuth–borate–silicate glass are nearly as good as that in tellurite glass, and the physical properties are similar to those in silicate glass. With the Judd–Ofelt and nonradiative theory analyses, the multiphonon decay and phonon-assisted energy-transfer (PAT) rates are calculated for the ${\mathrm{Er}}^{3+}∕{\mathrm{Ce}}^{3+}$ codoped glasses. For the PAT process, an optimum value of the glass phonon energy is obtained after ${\mathrm{B}}_2{\mathrm{O}}_3$ is introduced into the ${\mathrm{Er}}^{3+}∕{\mathrm{Ce}}^{3+}$ codoped bismuth–silicate glasses, and it much improves the energy-transfer rate between ${\mathrm{Er}}^{3+}{}^{4}I_{11∕2}\to {}^{4}I_{13∕2}$ and ${\mathrm{Ce}}^{3+}{}^{2}F_{5∕2}\to {}^{2}F_{7∕2}$, although there is an energy mismatch.

© 2007 Optical Society of America

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