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:
Sep. 07, 2010
Filed:
Oct. 28, 2005
Applicant:
Akihito Hongo, Tsuchiura, JP;
Inventor:
Akihito Hongo, Tsuchiura, JP;
Assignee:
Hitachi Cable, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical fiber for a fiber laser has: a hollow core region; an inner cladding region having a plurality of holes that extend in a longitudinal direction of the optical fiber and surround the hollow core region; and an outer cladding region that surrounds the inner cladding region. The inner cladding region has a solid part that is made of a glass material into a part or all of which a rare earth element is doped, and the outer cladding region has a refractive index lower than that of the solid part of the inner cladding region.