Thermal Stability And Optical Properties Of Er3+ Doped Bati02 Glasses

Er3+ doped BaTi2O5 spherical glasses were prepared using a containerless processing with an aerodynamic levitation furnace. These glasses were found to have high solubility of Er3+ and the substitution ratio of Er3+ for Ba2+ reached 30%. Differential scanning calorimetry measurements revealed that the glass transition temperature Tg and the crystallisation onset temperature Tx shifted to high temperature and the value of (formula) increased with the substation of Er3+, indicating that the stability against crystallisation improved. We found that these glasses had high refractive indices exceeding 2.1 with low Abbe numbers of approximately 20.