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:
Sep. 01, 2015
Filed:
Jul. 11, 2013
Applicant:
Furukawa Electric Co., Ltd., Tokyo, JP;
Inventor:
Katsunori Imamura, Tokyo, JP;
Assignee:
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/036 (2006.01); H04J 14/04 (2006.01); G02B 6/02 (2006.01); G02B 6/28 (2006.01);
U.S. Cl.
CPC ...
G02B 6/02042 (2013.01); H04J 14/04 (2013.01); G02B 6/2835 (2013.01);
Abstract
A multi-core optical fiber has: a plurality of core portions; a cladding portion that is positioned around each of the plurality of core portions and has a refractive index lower than that of each of the plurality of core portions; and a separation distance between adjacent ones of the plurality of core portions being set so that crosstalk of light between the adjacent core portions over an entire length thereof becomes −15 dB or greater at a wavelength of 1550 nm and a cable cut-off wavelength becomes 1530 nm or less.