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. 03, 2020
Filed:
Mar. 29, 2017
Fujikura Ltd., Tokyo, JP;
Katsubumi Nagasu, Chiba, JP;
Ryo Maruyama, Chiba, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
An optical fiber includes: a core; a cladding layer that is lower in refractive index than the core; and a depressed layer that lies between the core and the cladding layer and that is lower in refractive index than the cladding layer, wherein: the optical fiber has an effective core area Aeff that is equal to or greater than 100 μmand equal to or less than 129 μm, the core has a radius r1 that is equal to or greater than 5.2 μm and equal to or less than 7.4 μm, the core has a refractive index volume Vcore that is equal to or greater than 8.5% μmand equal to or less than 16.5% μm, the depressed layer has a refractive index volume Vdep that is equal to or greater than −40% μmand less than 0% μm.