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. 01, 2026
Filed:
Mar. 29, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Takahiro Suganuma, Osaka, JP;
Takemi Hasegawa, Osaka, JP;
Tetsuya Hayashi, Osaka, JP;
Hirotaka Sakuma, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A multi-core optical fiber includes a plurality of cores extending along a fiber axis, a cladding including the plurality of cores formed in the cladding, the cladding having rotational symmetry with respect to the fiber axis excluding a portion of the cladding where the plurality of cores are located, and a coating surrounding the cladding and having rotational symmetry with respect to the fiber axis. The multi-core optical fiber has inversion asymmetry with respect to the fiber axis in a side observation image in at least one of two directions each of which is perpendicular to the fiber axis.