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:
Aug. 23, 2016
Filed:
Dec. 13, 2013
Applicant:
Furukawa Electric Co., Ltd., Tokyo, JP;
Inventors:
Yukihiro Tsuchida, Tokyo, JP;
Yu Mimura, Tokyo, JP;
Assignee:
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/02 (2006.01); G02B 6/036 (2006.01); G02B 6/028 (2006.01); G02B 6/032 (2006.01); H01S 3/067 (2006.01);
U.S. Cl.
CPC ...
G02B 6/02042 (2013.01); G02B 6/0285 (2013.01); G02B 6/032 (2013.01); G02B 6/03622 (2013.01); H01S 3/06737 (2013.01); H01S 3/06754 (2013.01); H01S 3/06725 (2013.01); H01S 3/06729 (2013.01); H01S 3/06733 (2013.01); H01S 3/06741 (2013.01);
Abstract
A multi-core amplification optical fiber includes: a plurality of core portions doped with a rare-earth element; an inner cladding portion positioned at a periphery of the plurality of core portions, having a refractive index lower than a refractive index of the plurality of core portions, in which a first hole is formed; and an outer cladding layer positioned at a periphery of the inner cladding portion, having a refractive index lower than the refractive index of the inner cladding portion.