Glass composition that emits fluorescence in infrared wavelength region
AssigneesNippon Sheet Glass Co., Ltd., Yasushi Fujimoto, Masahiro Nakatsuka
InventorsShoichi Kishimoto, Koichi Sakaguchi, Masahiro Tsuda, Shigeki Nakagaki, Shigekazu Yoshii, Yasushi Fujimoto, Masahiro Nakatsuka
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Abstract
The present invention provides a glass composition that exhibits a fluorescence function and an optical amplification function in a wide wavelength range. This glass composition includes a bismuth oxide, a silicon oxide, an aluminum oxide, and a divalent metal oxide, and the glass composition emits fluorescence in an infrared wavelength region through irradiation of excitation light, with bismuth contained in the bismuth oxide functioning as a fluorescent source.
Claims12
The glass composition consisting of the following components, indicated by mol %:
- 55 to 80 SiO2;
- 5 to 25 Al2O3;
- 0.01 to 5 bismuth oxide in terms of Bi2O3;
- 0 to 15 Li2O;
- 0 to 5 Na2O;
- 0 to 5 K2O;
- 0 to 40 MgO;
- 0 to 30 CaO;
- 0 to 5 SrO;
- 0 to 5 BaO;
- 0 to 25 ZnO;
- 0 to 10 TiO2;
- 0 to 5 ZrO2;
- 0 to 10 B2O3;
- 0 to 5 of at least one selected from the group consisting of Y2O3, La2O3, Ta2O5, Nb2O5, GeO2 and In2O3;
- 0 to 1 of at least one selected from the group consisting of As2O3, Sb2O3, SO3, SnO2, Fe2O3, CL and F, and
- wherein the total of MgO+CaO+SrO+BaO+ZnO is in a range of 0.1 to 40 mol %, and
- wherein the glass composition emits fluorescence in an infrared wavelength region through irradiation of excitation light, with bismuth contained in the bismuth oxide functioning as a fluorescent source.
Dependencies are inferred from the claim text.