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. 04, 2018
Filed:
Sep. 24, 2015
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventors:
Assignee:
FUJIKURA LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/028 (2006.01); G02B 6/036 (2006.01); G02B 6/02 (2006.01);
U.S. Cl.
CPC ...
G02B 6/02009 (2013.01); G02B 6/0365 (2013.01); G02B 6/03627 (2013.01); G02B 6/03633 (2013.01);
Abstract
An optical fiber includes a core and a cladding surrounding an outer periphery of the core and has a refractive index profile in which a relative refractive index difference with respect to a distance r from a center of the core is represented by Δ(r), where a value of A represented by(Δ()−Δ())(Δ()−Δ())  (Formula 1)is 0.3%·μm or less, where a unit of r is μm, a unit of a relative refractive index difference Δ(r) is %, Δ(r)=−0.064r+0.494, and MFDis a mode field diameter at a wavelength of 1.31 μm.