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:
Oct. 05, 2010
Filed:
Jul. 08, 2008
Applicants:
Ryo Miyabe, Tokyo, JP;
Yu Mimura, Tokyo, JP;
Inventors:
Ryo Miyabe, Tokyo, JP;
Yu Mimura, Tokyo, JP;
Assignee:
The Furukawa Electric Co., Ltd, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/024 (2006.01); G02B 6/255 (2006.01);
U.S. Cl.
CPC ...
Abstract
A polarization-maintaining optical fiber includes a core region and a cladding region formed around the core region. The cladding region has a refractive index lower than a refractive index of the core region. A refractive index profile of the core region is either one of a step shaped or a concave shaped. The cladding region includes two holes formed in such a manner that a shortest distance from the core region is virtually zero at locations in opposite to each other across the core region.