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:
May. 01, 2007
Filed:
Nov. 01, 2005
Tatsuhiko Saito, Yokohama, JP;
Kenichiro Takahashi, Yokohama, JP;
Tetsutarou Katayama, Yokohama, JP;
Tatsuhiko Saito, Yokohama, JP;
Kenichiro Takahashi, Yokohama, JP;
Tetsutarou Katayama, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to an optical fiber having a configuration which enables utilization of nonlinear phenomena in the near-infrared region. The optical fiber is directed to a holey fiber having a core region extending along a predetermined axis and a cladding region with plural holes arranged along the core region. The plural holes are arranged to constitute plural layers about the core region in the cross-section orthogonal to the predetermined axis. The three holes constituting the first layer (the innermost layer) closest to the core region correspond to three vertexes from among the six vertexes of a regular hexagon and are placed such that the arrangement of the three holes has three-fold rotational symmetry. The optical fiber enables utilization of nonlinear phenomena in the near-infrared region, by properly adjusting the hole diameter d and the pitch L between adjacent holes from among the holes constituting a single layer.