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. 11, 2011
Filed:
Jul. 28, 2009
Osamu Mitomi, Sagamihara, JP;
Kenji Aoki, Nagoya, JP;
Jungo Kondo, Nishikamo-gun, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
Akiyoshi Ide, West Bloomfield, MI (US);
Osamu Mitomi, Sagamihara, JP;
Kenji Aoki, Nagoya, JP;
Jungo Kondo, Nishikamo-gun, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
Akiyoshi Ide, West Bloomfield, MI (US);
NGK Insulators, Ltd., Aichi, JP;
Abstract
The invention provides an optical phase modulator having a substrate made of an electro-optical material, a signal electrode provided on the substrate and first and second ground electrodes provided on both sides of the signal electrode. The electrodes are provided so that a size of the first gap between the first ground electrode and the signal electrode is smaller than a size of a second gap between the second ground electrode and the signal electrode. Furthermore, an optical waveguide is provided in the first gap as an optical phase modulator and not provided in the second gap. A driving voltage required for the phase adjustments is thereby lowered, the impedance matching is easily made and excellent radio frequency property can be realized.