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:
Jan. 20, 2026
Filed:
Oct. 05, 2023
Furukawa Electric Co., Ltd., Tokyo, JP;
Kazunori Mukasa, Tokyo, JP;
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
Abstract
An optical fiber includes: a core portion; a side core layer circumferentially surrounding the core portion; a cladding portion circumferentially surrounding the side core layer; and a coating layer circumferentially surrounding the cladding portion. When an average maximum relative refractive-index difference of the core portion to an average refractive index of the cladding portion is Δ, a relative refractive-index difference of an average refractive index of the side core layer to the average refractive index of the cladding portion is Δ, a relative refractive-index difference of the average refractive index of the cladding portion to pure silica glass is ΔClad, Δ>ΔClad>Δand 0>Δhold, the Δis 0.18% or more and 0.24% or less, the Δis −0.27% or more and −0.12% or less, and (Δ) is 0.36% or more and 0.45% or less.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile