OPTICAL AMPLIFYING GLASS AND OPTICAL WAVEGUIDE

摘要

An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi2O3, at least one of B2O3 and SiO2, at least one member selected from the group consisting of Ga2O3, WO3 and TeO2, and La2O3 in such a ratio that Bi2O3 is from 20 to 80 mol%, B2O3+SiO2 is from 5 to 75 mol%, Ga2O3+WO3+TeO2 is from 0.1 to 35 mol%, and La2O3 is from 0.01 to 15 mol%.