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:
Jan. 18, 2011
Filed:
Sep. 28, 2007
Yuhki Kinpara, Chiyoda-ku, JP;
Junichiro Ichikawa, Chiyoda-ku, JP;
Satoshi Oikawa, Chiyoda-ku, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Abstract
To provide a light control device which is possible to realize a velocity matching between a microwave and an optical wave or an impedance matching of microwaves even through a signal oath having a high impedance of 70Ω or more, and is possible to reduce a driving voltage. The light control device having an electro-optical effect includes a thin platehaving a thickness of 10 μm or less, an optical waveguideformed in the thin plate, and a controlling electrode from controlling light which passes through the optical waveguide, wherein the controlling electrode includes a first electrode and a second electrode which are disposed so as to interpose the thin plate, wherein the first electrode has a coplanar type electrode which includes at least a signal electrodeand a grounding electrode(), wherein the second electrode includes at least a grounding electrodeand is configured so as to apply an electric field to the optical waveguide in cooperation with the signal electrode of the first electrode, and wherein the signal electrode of the first electrode includes a branched signal path in which at least one signal path is branched into two or more in the middle of the path.