Abstract
Tellurite glasses with composition 75TeO(2)-12.5Nb(2)O(5)-12.5ZnO-3000ppm Sm2O3 was prepared by using a conventional melt quenching method. The optical properties of this glasses system investigated by using UV-Vis-NIR absorption spectra in the range from 200 to 2500 nm and linear refractive indices (n) at different wavelength was estimated. From the absorption edge studies, the value of optical band gap (E-opt) was determined. Moreover, the nonlinear refractive index (n(2)), third-order nonlinear susceptibility (chi((3))), and nonlinear absorption coefficient, (beta), were observed. It is noticed that the nonlinear parametersn(2),chi((3)) and beta increase by decreasing the value of optical band gap (E-opt). The gain cross-section of laser transition level from H-6(5/2) -> (6)F(1/2)was obtained. This glass has the effective emission cross section bandwidth (41 nm) and large stimulated emission cross-section (1.09x 10(-20)cm(2)). Spectroscopic properties indicate that this glass doped with Sm3+ is a promising candidate for optical applications.