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. 05, 2009
Filed:
May. 15, 2008
Kenji Aoki, Nagoya, JP;
Osamu Mitomi, Nagoya, JP;
Jungo Kondo, Aichi-prefecture, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
Kenji Aoki, Nagoya, JP;
Osamu Mitomi, Nagoya, JP;
Jungo Kondo, Aichi-prefecture, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
The present invention provides an optical waveguide device having a configuration such that the optical waveguide is folded back on an end area of the optical waveguide substrate to widen the modulation band. The optical waveguide deviceA includes a substrate bodymade of an electro-optical material, optical waveguide, and modulation electrodesandfor applying a voltage on the optical waveguide. The optical waveguideincludes first primary areasand, a first curved areaA, first folding-back areasandprovided between the first curved areaA and a folding-back point, second primary areasand, a second curved areaB, and second folding-back areasandprovided between the second curved areaB and the folding-back point. At least a part of the signal electrode is provided in a folding-back region extending from the first curved areaA and the second curved areaB to the folding-back point