Refractive Index And Thermo-Optic Coefficients Of Ge-As-Se Chalcogenide Glasses

17 glasses int he Ge-As-Se ternary glass-forming region have been fabricated and analysed to provide input for optical design data and to establish composition and structure-based relationships to aide development of novel chalcogenide glasses with tailored optical functionality. While known that Ge addition to binary As-Se glasses enhances the mean coordination number (MCN) of the network and results in increased Tg and decreased CTE, this work highlights the impact on optical properties, specifically mid-wave index and thermo-optic coefficient.