Tellurite glass, optical amplifier and light source using the tellurite glass

摘要

PROBLEM TO BE SOLVED: To obtain tellurite glass for light amplification by which an induced emission cross section in a wide band is made more flat by composing the composition of stock glass for an optical fiber or an optical waveguide of Bi₂O₃, Na₂O, ZnO and TeO₂ of a specific mole %. ;SOLUTION: The tellurite glass as a stock glass used for a light amplifier and a light source is composed of, by mol, 0 to 20%, preferably 1.5 to 15% Bi₂O₃, 0-35% Na₂O, 0-35% ZnO and 55-90% TeO₂. A light amplification medium comprises an optical fiber or an optical waveguide provided with core and clad glasses. Erbium and ytterbium are preferably added to the tellurite glass of the core and clad glasses. A laser device is provided with the light amplification medium and an exciting light source and the optical fiber using the erbium added tellurite glass is used as the light amplifier.;COPYRIGHT: (C)1999,JPO