The effect of CdS addition on linear and non-linear refractive indices of glasses in the system TeO 2/Nb 2O 5/ZnO

Abstract

Glasses in the system TeO 2/Nb 2O 5/ZnO/CdS were studied with respect to the density, molar volume, refractive index, polarizability, molar refraction, metallization and third order non-linear optical susceptibility. The third order non-linear optical susceptibilities, χ (3), were measured using degenerate four-wave mixing (DFWM). The addition of CdS to TeO 2-based glasses leads to increasing refractive as well as the non-linear refractive indices. The largest measured value of the third order non-linear optical susceptibility was 7.8 × 10 −13 esu and has been found in the 90TeO 2 · 5Nb 2O 5 · 5ZnO · 0.4 CdS glass. The non-linear optical susceptibility increased with increasing CdS-concentration. In order to estimate the third order non-linear optical susceptibility, the theoretical model of Lines and the empirical equation of Miller were used.