LIGHT AMPLIFYING MEDIUM AND RESIN COAT LIGHT AMPLIFYING MEDIUM AND LIGHT AMPLIFIER AND LASER DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a light amplifying medium in which a wide band gain can be obtained in a wavelength area ranging from 1.45 to 1.64μm, and any thermal damage can be hardly generated. SOLUTION: This light amplifying medium is constituted of a core glass 1 and a clad glass 2, and the core glass 1 is formed by doping Er to a matrix glass by 0.001-10% as mass percentage display, and the matrix glass contains Bi2O3 in the range of 25-70 mol% and at least either B2O3 or SiO2.