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:
Jun. 06, 2017
Filed:
Aug. 15, 2016
Fujikura Ltd., Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Osaka Prefecture University Public Corporation, Sakai-shi, Osaka, JP;
Tsukasa Hosokawa, Sakura, JP;
Kentaro Ichii, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Shoichiro Matsuo, Sakura, JP;
Hirotaka Ono, Atsugi, JP;
Makoto Yamada, Sakai, JP;
FUJIKURA LTD., Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION, Sakai-Shi, Osaka, JP;
Abstract
An amplification optical fiber operable to propagate light beams in a plurality of modes in a predetermined wavelength range through a core doped with a rare earth element, wherein Expression (1) is satisfied, where a cutoff wavelength of a propagated highest mode light beam is defined as λmax, under conditions in which the cutoff wavelength of the highest mode light beam is defined as λc, a shortest wavelength of the wavelength range is defined as λmin, and a cutoff wavelength of a second-highest mode light beam to the highest mode light beam is λmin.λ>0.5 λmin+0.5 λmax  (1).