抄録
Er3+-doped 50SiO2-(50-x)PbO-xPbF2 glasses were prepared. The effect of PbF2 content on refractive indices, densities, absorption spectra, the Judd-Ofelt parameters Ωt (t=2,4,6), fluorescence spectra and the lifetimes of 4I13/2 level of Er3+ of the glasses were investigated, and the stimulated emission cross-section was calculated from McCumber theory. With increasing PbF2 content in the glass composition, the Ω6 parameter, fluorescence full width at half max maximum (FWHM) and lifetimes of 4I13/2 level of Er3+ increase, while refractive indices and densities decrease. The FWHM value is related to the Ω6 parameter, and the lager the Ω6 parameter, the broader the FWHM. Compared with other glass hosts, the gain bandwidth properties of Er3+-doped 50SiO2-50PbF2 glass is close to those of tellurite and bismuth glasses, and has advantage over those of silicate, phosphate and germante glasses.
