초록 ▼

Conventional glass compositions including bismuth as a fluorescent element have a broad amplification wavelength region but do not allow the emission intensity in the 1.3-μm range to be sufficiently high through the excitation caused by light in the 0.8-μm and 0.98-μm ranges. The pre

Conventional glass compositions including bismuth as a fluorescent element have a broad amplification wavelength region but do not allow the emission intensity in the 1.3-μm range to be sufficiently high through the excitation caused by light in the 0.8-μm and 0.98-μm ranges. The present invention provides a glass composition including: bismuth; a glass network former; and at least one element selected from the group consisting of dysprosium, erbium, ytterbium, neodymium, thulium, holmium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, and molybdenum (except for tetravalent titanium and trivalent iron), wherein the glass composition emits fluorescence in an infrared wavelength region, with the bismuth functioning as a fluorescent source through irradiation of excitation light. The emission intensity is increased by the sensitization effect of the at least one element.

대표청구항 ▼

What is claimed is: 1. A glass composition consisting of the following components, indicated by mol %: 30 to 80 SiO2; 0 to 40 Li2O; 0 to 30 Na2O; 0 to 20 K2O; 0 to 40 MgO; 0 to 40 CaO; 0 to 30 SrO; 0 to 20 BaO; 0 to 40 Al2O3; 0 to 40 ZnO; 0 to 30 TiO2; 0 to 30 ZrO2; 0 to 30 Y2O3; 0 to 30 La2O3; 0 t

What is claimed is: 1. A glass composition consisting of the following components, indicated by mol %: 30 to 80 SiO2; 0 to 40 Li2O; 0 to 30 Na2O; 0 to 20 K2O; 0 to 40 MgO; 0 to 40 CaO; 0 to 30 SrO; 0 to 20 BaO; 0 to 40 Al2O3; 0 to 40 ZnO; 0 to 30 TiO2; 0 to 30 ZrO2; 0 to 30 Y2O3; 0 to 30 La2O3; 0 to 20 B2O3; 0.01 to 2 bismuth in terms of Bi2O3; and 0.01 to 12 of at least one cation selected from the group consisting of Dy3+, Er3+, Yb3+, Nd3+, Tm3+, Ho3+, Ti3+, V3+, V4+, V5+, Cr3+, Cr6+, Mn2+, Mn3+, Fe2+, Co2+, Ni2+, Cu+, Cu2+, Mo3+, and Mo4+ in terms of oxide of the at least one cation, wherein the total of Li2O+Na2O+K2O+CaO+SrO+BaO+ZnO+B2O3 is in a range of 0.1 to 60 mol %, the glass composition emits fluorescence in an infrared wavelength region, with the bismuth functioning as a fluorescent source through irradiation of excitation light, and the total content by percentage of impurities is lower than 1 mol %. 2. The glass composition according to claim 1, wherein the cation is Yb3+. 3. The glass composition according to claim 2, wherein the content of Yb3+ is in a range of 0.01 to 2.0 mol % in terms of Yb2O3.