Patent ID: 6599853
Filing Date: 2003-07-29
Classification: C03C,H01S

Abstract:
An optical amplifier glass comprising a matrix glass comprising the following oxides:OxidesMol %Bi2O320 to 80,B2O3â€‚0 to 75,SiO2â€‚0 to 79.9,Al2O3â€‚0 to 10,Ga2O3â€‚0 to 30,GeO2â€‚0 to 30,Li2Oâ€‚0 to 50,TiO2â€‚0 to 50,ZrO2â€‚0 to 50,SnO2â€‚0 to 50,WO3â€‚0 to 30,TeO2â€‚0 to 30, andCeO2â€‚0 to 10wherein at least one of B2O3 and SiO2 is contained, and Er doped to said matrix glass, wherein from 0.01 to 10% by mass percentage of Er is doped to said matrix glass which has a total content of Al2O3 and Ga2O3 of at least 0.1 mol %, a content of Bi2O3 of at least 20 mol %, a refractive index of at least 1.8 at a wavelength of 1.55 &mgr;m, a glass transition temperature of at least 360Â° C., an optical basicity of at most 0.49.