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:
Nov. 17, 2015
Filed:
May. 06, 2013
Fujikura Ltd., Koto-ku,. Tokyo, JP;
Osaka Prefecture University Public Corporation, Sakai, Osaka, JP;
Ryo Maruyama, Sakura, JP;
Nobuo Kuwaki, Sakura, JP;
Shoichiro Matsuo, Sakura, JP;
Masaharu Ohashi, Sakai, JP;
FUJIKURA LTD., Tokyo, JP;
OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION, Osaka, JP;
Abstract
An optical fiber () includes (i) an inner core () whose refractive index distribution has an α profile, (ii) an outer core () which surrounds the inner core (), and (iii) a clad () which surrounds the outer core (). In the optical fiber (), Rd is set to not less than 0.15, where Rd is a ratio of a refractive index difference between the outer core () and the clad () to a refractive index difference between a center part of the inner core () and the clad ().