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:
Apr. 20, 2010
Filed:
Apr. 20, 2009
Naomi Kumano, Tokyo, JP;
Naomi Kumano, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A relative refractive index difference Δbetween a center core region and a cladding layer is 0.30% to 0.35%, a relative refractive index difference Δbetween an outer core layer and the cladding layer is −0.10% to −0.04%, and Δis 2.5:1 to 7.5:1. A diameter of the center core region is 9.0 μm to 10.5 μm, and a ratio of diameters of the center core region and the outer core layer is 0.20 to 0.35. A cutoff wavelength is 1310 nm or shorter, a zero dispersion wavelength is 1285 nm to 1345 nm, and at a wavelength of 1550 nm, an MFD is 10.5 μm or larger, a transmission loss is 0.185 dB/km or lower, and a bending loss is 15 dB/m or lower.