Spectroscopic and thermal properties of novel Yb3+-doped TeO2–PbO–NbO2.5 based tellurite glasses with high emission cross-section

Abstract

Series of 70% TeO 2 - x% PbO – (30 - x%) NbO 2.5 (x = 0, 5, and 10 mol.%) glasses doped with Yb 2 O 3 were prepared by the melt-quenching method. Their emission cross-sections, fluorescence lifetimes and gain coefficient were investigated by the absorption spectra and the fluorescence decay curves, respectively. The results show that the glass with 10% PbO possesses the largest emission cross-section of 1.51 pm2, the fluorescence lifetime of 0.68 ms and the gain coefficient of 1.03 ms ⋅ pm 2. These indicate that this tellurite glass may have potential application as Yb 2 O 3 doped gain medium for solid laser.