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:
Apr. 05, 2005
Filed:
Dec. 23, 2002
Toshiyuki Kambe, Tokyo, JP;
Tadahiko Hanada, Tokyo, JP;
Toshiyuki Kambe, Tokyo, JP;
Tadahiko Hanada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An integrated type optical waveguide device includes an input section which contains at least one first optical waveguide and has at least one input end and a plurality of output ends. A phase shifter section has a plurality of second optical waveguides, each of which has one output end and one input end coupled with a corresponding one of the plurality of output ends of the input section. An output section contains at least one third optical waveguide and has at least one output end and a plurality of input ends, each of which is coupled with the output end of a corresponding one of the plurality of second optical waveguides. A material of each of the plurality of second optical waveguides is different from a material of each of the first and third optical waveguides.