Refractive index behavior of tellurite glasses

Abstract In this paper, we investigated the experimental data of selected tellurite glasses in the form 80TeO2–5TiO2– (15-x) WO3 - xAnOm, and AnOm is Nb2O5, Nd2O3, Er2O3 and x = 0.1; 1; 3 and 5 mol%, by means of the refractive index obtained by the Sellmeier's coefficients and the average Polarizability determined by the Lorentz-Lorentz equation. From these results, it was possible to apply the generalized Drude-Lorentz model with the Caputo operator and thus observe that different domains of the system presented different parameters of the fractional derivative operator. These results corroborate to determine possible changes in the fractality of these vitreous systems.