The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2009
Filed:
Aug. 25, 2008
Masateru Tadakuma, Tokyo, JP;
Masateru Tadakuma, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An optical fiber made of silica-based material includes a core and a cladding formed around the core. The core is doped with germanium dioxide, which increases refractive index and decreases acoustic-wave velocity, and aluminum oxide, which increases both refractive index and acoustic-wave velocity, satisfying—2.814+0.594×W≦W≦54.100+0.218×W, W+W≦60, and W≧56.63−2.04×W, where Wis doping amount of germanium dioxide in weight percentage, which is larger than 4.74, and Wis doping amount of aluminum oxide in weight percentage. A nonlinear coefficient of the optical fiber is equal to or larger than 2.6×10W.