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:
Mar. 22, 2011
Filed:
Mar. 30, 2006
Tohru Sugamata, Tokyo, JP;
Satoshi Oikawa, Tokyo, JP;
Tohru Sugamata, Tokyo, JP;
Satoshi Oikawa, Tokyo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Abstract
There is provided an optical control element in which non-guided light is prevented from entering into an optical waveguide and which is excellent in optical properties, such as optical modulation properties. A media processor, such as a CD publisher, having a function as a media library. An optical control element includes: a substrate formed of a material having an electro-optical effect; and an optical waveguide formed on a top or bottom surface of the substrate. The optical waveguide has a modulation region b (s) and non-modulation regions a and c along the propagating direction of a light wave propagating through the optical waveguide. In the case when the modulation region is configured to include a single optical waveguide, propagation constants βto βof optical waveguides in the modulation region and the non-modulation region adjacent to each other are set to different values in the modulation region and the non-modulation region. In the case when the modulation region is configured to include a plurality of optical waveguides, a propagation constant of at least one of the optical waveguides in the modulation region is set to a value different from that in the non-modulation region.