Sulfide–halide glasses with high nonlinear refractive index and low nonlinear absorption

Abstract Determination of the composition with the best optical and physical properties in a sulfide–halide arsenic-free vitreous domain, GeS2–Sb2S3–CsI, is described. The characteristic temperatures: glass transition (Tg) and crystallization temperatures (Tx) are measured to determine the difference Tx−Tg. The nonlinear index and absorption, the linear index are measured on nine samples in the vitreous domain. With an experimental device, cartographies of each property are created. The model permits to find a composition with a good compromise for Tx−Tg, nonlinear index and nonlinear absorption. The model emphasizes the influence of each element on each property.