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:
Oct. 06, 2026
Filed:
Aug. 19, 2021
Ntt, Inc., Tokyo, JP;
Yusuke Yamada, Musashino, JP;
Kazuhide Nakajima, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
An object of the present invention is to ensure low crosstalk for all multi-core optical fibers in an optical fiber cable having a plurality of identical multi-core optical fibers of non-coupling type in different spiral shapes. An optical fiber cable according to the present disclosure is an optical fiber cable formed by twisting a plurality of units each of which is formed by bundling a plurality of identical multi-core optical fibers of non-coupling type, which includes: that all the units have the same diameter; that the units are arranged in a plurality of layers from a center in a cross section; that the units are arranged in a spiral shape for each of the layers in a longitudinal direction; that all the units included in one of the layers have the same twist pitch of the spiral shape; and that the twist pitch is different for each layer, and is set based on a curvature Rpk of the multi-core optical fiber where crosstalk is the largest.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile