Luminescence spectra and optical properties of TeO 2–WO 3–Li 2O glasses doped with Nd, Sm and Er rare earth ions

Abstract

New tellurite glass series of the form (70– x)TeO 2–20WO 3–10Li 2O– xLn 2O 3, where x=0, 1, 3 and 5 mol% and Ln=Nd, Sm and Er, were prepared. Density of the prepared glasses was measured and molar volume was calculated. Luminescence spectra of the prepared glasses were measured at room temperature using a micro-Raman spectrometer. The obtained luminescence intensity ratio was correlated with the rare earth ion concentration, the short distance between the identical rare earth ions r(Ln–Ln) and the glass density. Optical properties like refractive index, molar refractivity and optical polarizability were theoretically calculated in order to interpret the dependence of these properties on the rare earth ion content.