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:
Nov. 06, 2007
Filed:
Sep. 10, 2003
Takashi Shinriki, Tokyo, JP;
Toshihiro Sakamoto, Tokyo, JP;
Masanao Kurihara, Tokyo, JP;
Toru Sugamata, Tokyo, JP;
Norikazu Miyazaki, Tokyo, JP;
Takashi Shinriki, Tokyo, JP;
Toshihiro Sakamoto, Tokyo, JP;
Masanao Kurihara, Tokyo, JP;
Toru Sugamata, Tokyo, JP;
Norikazu Miyazaki, Tokyo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Abstract
An optical modulator in which stabilized driving is realized over a long time by relaxing stress generated in a recess formed in the surface of a substrate in the optical modulator and controlling deterioration of optical modulation control caused by stress-strain in the substrate including an optical waveguide. The optical modulator comprises a substrate of a material exhibiting electrooptic effect, an optical waveguide () provided on the substrate, and control electrodes (-) for controlling the phase of light being guided through the optical waveguide characterized in that a recess () is provided in the surface of the substrate for forming the control electrodes, and the control electrode () being formed on the recess is provided with a stress relaxing means.