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. 06, 2007
Filed:
Jul. 12, 2005
Ning Guan, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Katsuaki Izoe, Sakura, JP;
Kazuhiko Aikawa, Sakura, JP;
Kuniharu Himeno, Sakura, JP;
Ning Guan, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Katsuaki Izoe, Sakura, JP;
Kazuhiko Aikawa, Sakura, JP;
Kuniharu Himeno, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A hole-assisted holey fiber is provided. The holey fiber includes a core region; a cladding region around the core region, and a plurality of holes in the cladding region around the core region. The core region has a higher refractive index than that of the cladding region. The holes form an inner hole layer and an outer hole layer, and the inner hole layer has the same number of holes as the number of the holes in the outer hole layer. The outer layer holes are provided in locations in which inner holes are absent when viewed from the center of the core region, and holes defining the same layer have the same diameter. A distance Λfrom a center of the core region to a center of an inner hole and a distance Λfrom the center of the core region to a center of an outer hole satisfy the relationship Λ<Λ, and a diameter dof an inner hole and a diameter dof an outer hole satisfy the relationship d≧d.