Effect of ZnO and Bi2O3 addition on linear and non-linear optical properties of tellurite glasses

Glasses in the system TeO2–Bi2O3–ZnO were studied with respect to their linear refractive indices and optical absorption in the UV–vis range. The third order non-linear refractive indices were measured using degenerated four wave mixing (DFWM). The optical Kerr susceptibilities calculated hereof were in the range from 5.49 to 6.58 × 10−13 esu and hence 34–41 times larger than that of fused SiO2. They are roughly proportional to values theoretically calculated by the theory of Lines.