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:
Apr. 17, 2007
Filed:
Apr. 13, 2005
Applicants:
Yoko Moriai, Tokyo, JP;
Keiichi Aiso, Tokyo, JP;
Inventors:
Yoko Moriai, Tokyo, JP;
Keiichi Aiso, Tokyo, JP;
Assignee:
The Furukawa Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/036 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical amplification fiber for an optical fiber amplifier that amplifies a signal light using a pumping light has an absorption coefficient that satisfies conditional relations αs≧2.0 dB/m and αp/αs≧−0.0697×αs+1.30, where αp is the absorption coefficient in a pumping light wavelength band, and αs is the absorption coefficient in a signal light wavelength band.