Linear and non-linear optical study of fluorotellurite glasses as function of selected alkaline earth metals doped with Er3+

A systematic characterization of optical and chemical properties of fluorotellurite glasses based on 70TeO(2)-5M(x)O(y)-10P(2)O(5)-10ZnO-5PbF(2) glasses as function of alkaline earth metals as network modifiers were studied and analysed. The Z-scan results show that all the compounds have NLO properties such as nonlinear refractive index (n(2)) and two photon absorption (beta). Finally, using (n(2) ) and (beta) we also determined the third-order nonlinear optical susceptibility chi(< 3 >). It was found that the alkaline earth metals elements, have an influence on such NLO properties. Based on the ability of the lattice modifiers to decrease the band-gap energy while simultaneously increasing the linear refractive index of the TeO2-based glass, we investigated how these modifiers affect the non-linear refractive index.