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. 12, 2006
Filed:
Feb. 21, 2003
Tadahiko Hanada, Tokyo, JP;
Tadahiko Hanada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Bent waveguide partsandon a substrateof an arrayed waveguide chiphave a core dimension allowing multi-mode operation, but they are adapted to constitute higher order mode filters with adequate combination of the relation of the height and width of waveguides and the minimum radius of curvature. Thus, with the multi-mode as preamble it is possible to cut off higher order mode light propagation by setting a small minimum radius of curvature, thus realizing single-mode light propagation and reducing the optical coupling loss through optical fibersandThus, it is possible to realize a waveguide chip and a waveguide device with the minimum radius of curvature of bent waveguides and less optical coupling loss in connection parts to optical fibers.