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, 2015
Filed:
Aug. 16, 2012
Shoji Tanigawa, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Shoji Tanigawa, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
Provided is a method of producing a preformP for a coupled multi-core fiber including: an arranging process Pfor arranging a plurality of core glass bodiesR and a clad glass bodyR in such a way that the plurality of core glass bodiesR are surrounded by the clad glass bodyR; and a collapsing process Pfor collapsing a gap between the core glass bodiesR and the clad glass bodyR, wherein the respective core glass bodiesR have outer regionshaving a predetermined thickness from the periphery surfaces and made of silica glass undoped with germanium, and the clad glass bodyR is made of silica glass having a refractive index lower than a refractive index of the outer regions of the core glass bodiesR.