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:
Jul. 24, 2007
Filed:
Jan. 06, 2006
Yuki Taniguchi, Tokyo, JP;
Yoshihiro Emori, Tokyo, JP;
Ryuichi Sugizaki, Tokyo, JP;
Atsushi Oguri, Tokyo, JP;
Takeshi Yagi, Tokyo, JP;
Yuki Taniguchi, Tokyo, JP;
Yoshihiro Emori, Tokyo, JP;
Ryuichi Sugizaki, Tokyo, JP;
Atsushi Oguri, Tokyo, JP;
Takeshi Yagi, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An optical fiber for Raman amplification amplifies a signal light with a pumping light. A chromatic dispersion at a wavelength of 1,550 nm is in a range between −70 ps/nm/km and −30 ps/nm/km. Raman gain efficiency with a pumping light of 1,450 nm is equal to or more than 5 (W×km). Nonlinear coefficient at the wavelength of 1,550 nm is equal to or less than 5.0×10W. Zero-dispersion wavelength is neither at a wavelength of the signal light nor at a wavelength of the pumping light. Cut-off wavelength is equal to or less than the wavelength of the pumping light.