An ultra stable glass system for optical fiber devices

Abstract

In this paper a modified chalcogenide glass was studied by X-ray powder diffraction, differential thermal analysis, infrared and Raman scattering spectroscopies. The study of this new matrix opens new perspectives to fabricate Pr³⁺-doped fibers to operate as an optical amplifier in the 1.3 μm telecommunications window. The Pr³⁺-doped 70Ga₂S₃–30La₂S₃ glass was modified through the substitution of La₂S₃ by La₂O₃, which improves the thermal stability of these glasses without any modification of phonon energy. The possibility to pull a fiber from this glass system without any devitrification is easily achieved.