Totally visible transparent chloro - Sulphide glasses based on Ga 2S3 - GeS2 - CsCl

Abstract

In this paper, the influence on optical properties of alkali halides such as CsCl in a covalent glassy matrix has been investigated. Chalcogenide glasses belonging to the (GeS2)-(Ga2S3)-CsCl system with high ratio of CsCl present an entire transparency in the visible range. These glasses maintain good transmission up to 12μm. Furthermore, the thermomechanical properties and the glass hygroscopicity have been investigated as function of the CsCl amount. This new generation of glasses presents a great interest for optical application. They could be used both for passive applications (multi-spectral imaging) and active applications for rare-earth doping due to their good transmission in the visible range, increasing optical pumping possibilities.