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:
Feb. 02, 2016
Filed:
Jan. 30, 2013
Sumitomo Osaka Cement Co., Ltd., Chiyoda-ku, Tokyo, JP;
National Institute of Information and Communications Technology, Koganei-shi, Tokyo, JP;
Youichi Hosokawa, Tokyo, JP;
Kaoru Higuma, Tokyo, JP;
Tetsuya Kawanishi, Koganei, JP;
Atsushi Kanno, Koganei, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Chiyoda-ku, Tokyo, JP;
NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, Koganei-shi, Tokyo, JP;
Abstract
The optical modulator includes optical modulation units. The plurality of optical modulation units is disposed in parallel on the same substrate. One input waveguide branches off to be connected to the Mach-Zehnder type optical waveguide of each optical modulation unit, and an entire optical waveguide is formed such that outputs from the Mach-Zehnder type optical waveguides are combined and output through one output waveguide. A modulation signal with the same intensity is applied to a modulation electrode of each optical modulation unit. In at least some of the optical modulation units, mechanical structures including the modulation electrodes of the optical modulation units are configured such that an amplitude value of an optical output modulated by the modulation signal of the optical modulation unit is ½(n is a natural number) of a maximum amplitude value in other optical modulation units.