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. 29, 2017
Filed:
May. 12, 2015
Sumitomo Electric Industries, Ltd., Osaka-shi, Osaka, JP;
Kazuyuki Sohma, Yokohama, JP;
Takehiko Kawano, Yokohama, JP;
Noriaki Iwaguchi, Yokohama, JP;
Takashi Fujii, Yokohama, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka-shi, Osaka, JP;
Abstract
An optical fiberA comprises an optical transmission memberincluding a coreand a clad, a primary resin layer, and a secondary resin layer. The effective area of the optical transmission memberis 130 μmor larger. The transmission loss of the optical transmission memberat a wavelength of 1550 nm is 0.165 dB/km or smaller. The Young's modulus of the primary resin layeris 0.7 MPa or lower, and the Young's modulus of the secondary resin layeris 600 MPa or higher and 1500 MPa or lower. The difference between the transmission loss when the optical fiberA is wound at a tension of 80 g around a bobbin on which a metal mesh member having vertical wires of a 50-μm diameter and horizontal wires of a 50-μm diameter are wound and spaced at a pitch of 150 μm, and the transmission loss of an optical fiber coil is 1.0 dB/km or smaller.