Abstract
Glass samples have been synthesized in quaternary system based on TeO (2)-oxide within composition, 85TeO (2)-5Nb O-2 (5)-5ZnO-5Ag O-2, 68TeO (2)-5Nb O-2 (5)-20ZnO-7Na O-2 and [(75-x)TeO (2)-5Nb O-2 (5)-20ZnO-xPbO, x = 7, 18 mol%]. Structural characterization of the glasses was studied with respect to their thermal stability, refractive indices, third order nonlinear optical susceptibility, IR spectra and Vickers hardness. For four different prepared glasses, density in the range from 5 center dot 3744 to 6 center dot 0731 g center dot cm (-aEuro parts per thousand 1), the glass transition temperature (T (g)) in the range from 326 to 350 A degrees C and refractive indices, n, in the range from 2 center dot 1273 to 2 center dot 2123 at 435 nm and Vickers hardness, H (v,) in the range from 2 center dot 91 to 3 center dot 44 GPa were determined. The value of third order nonlinear optical susceptibilities 17 center dot 9 center dot 10 (-aEuro parts per thousand 13) esu of glass within composition, 68TeO (2)-5Nb O-2 (5)-20ZnO-7PbO, was measured by using degenerate four-wave mixing (DFWM).