Optical fiber for light amplification comprises a praseodymium doped germanium-gallium-sulfur glass containing a halogen to avoid clustering

摘要

An optical fibers is formed by doping a germanium-gallium-sulfur (Ge-Ga-S) glass containing less sulfur than a GeS2-Ga2S3 stoichiometry composition, with a rare earth element and also 0.1-10 atomic % of a halogen based on the Ge-Ga-S glass. Preferred features. The rare earth element is praseodymium ions (Pr<3+>) and the halogen is bromine or iodine. The fiber contains less than 10 mole % gallium and less than 70 mole % sulfur.