Effect of Er2O3 and ErF3 on the optical properties of sodium oxyfluoroborate glasses

Abstract

Glasses based on B₂O₃–Na₂O–NaF doped with Er₂O₃ and ErF₃ were prepared by the melt quench technique.  Density was measured and molar volume was calculated.  The density and molar volume increased with the increase of Er₂O₃ and ErF₃ content.  Optical absorption spectra were measured to study the optical properties and their dependence on the Er₂O₃ and ErF₃. The refractive index is estimated and correlated with the wavelength, Er₂O₃, ErF₃, density, and O/F ratio.  Nonlinear refractive index, optical and magnetic susceptibilities, Abbe number, molar refractivity, electronic polarizability, and energy gap were also calculated and correlated with Er₂O₃ and ErF₃ contents.