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:
Mar. 30, 2021
Filed:
Sep. 10, 2020
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Optifrontier Co., Ltd., Yokohama, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD., Yokohama, JP;
Abstract
An optical fiber according to an embodiment includes a core having a single-peaked and graded refractive index profile, an inner cladding surrounding the core, and an outer cladding surrounding the inner cladding. The inner and outer claddings have refractive indices lower than the maximum refractive index of the core. A photosensitive region constituted by the core and the inner cladding contains a photosensitive material. The inner cladding has an outer diameter one time or more and two times or less the MFD of an LPmode in a 1310-nm wavelength band.