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:
Nov. 16, 2010
Filed:
Sep. 13, 2007
Takeshi Yoshida, Sakura, JP;
Tomohiro Nunome, Sakura, JP;
Takeshi Yoshida, Sakura, JP;
Tomohiro Nunome, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
An optical fiber is constituted by: a three-layer structured core which includes, a first core (having a relative refractive index difference of Δin a region of a radius of R), a second core (having a relative refractive index difference of Δin a region from the radius Rto a radius of R), and a third core (having a relative refractive index difference of Δin a region from the radius of Rto a radius of R), wherein the relative refractive index differences have relationships of Δ, and Δ, when Δ=X and Δ=Y, (X+Y)>0.4% is satisfied, and X and Y satisfy 0.25%<X<0.6%, 0.1%≦Y≦0.6%, and a relationship of (2*X−0.7)%<Y<(X/2+0.4)%, thereby satisfying the G652 standard and having an SBS threshold equal to or higher than that of an optical fiber having the same MFD by +3 dB or higher.