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. 27, 2015
Filed:
Feb. 03, 2011
Shoji Tanigawa, Sakura, JP;
Teruno Nakaguma, Sakura, JP;
Tomofumi Arai, Sakura, JP;
Kentaro Ichii, Sakura, JP;
Shoji Tanigawa, Sakura, JP;
Teruno Nakaguma, Sakura, JP;
Tomofumi Arai, Sakura, JP;
Kentaro Ichii, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
An ytterbium-doped optical fiber includes: a core which contains at least ytterbium, aluminum, and phosphorus; and a cladding which encircles the core, wherein an aluminum oxide equivalent concentration of the aluminum in the core is 0.2 mol % or more, a diphosphorus pentaoxide equivalent concentration of the phosphorus is higher than the aluminum oxide equivalent concentration, and the core either does not contain germanium or contains less than 1.1 mol % of germanium in a germanium dioxide equivalent concentration.