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:
Jul. 27, 2004
Filed:
Jun. 21, 2002
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An arrayed waveguide grating optical multiplexer/demultiplexer includes an arrayed waveguide having a plurality of channel waveguides which includes a shortest channel waveguide having a shortest length. Each channel waveguide includes a curved portion provided between first and second connection portions. The shortest channel waveguide has a radius (R ) of curvature of the curved portion and an angle (&thgr; ) which is a half of a central angle of the curved portion. The radius (R ) of curvature and the angle (&thgr; ) are determined such that a product (R ×&thgr; ) is a value within a range which includes a minimum value of the product (R ×&thgr; ) and in which all of the plurality of channel waveguides are drawn.