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:
May. 03, 2016
Filed:
Mar. 30, 2010
Katsutoshi Kondou, Chiyoda-ku, JP;
Satoshi Oikawa, Chiyoda-ku, JP;
Toru Sugamata, Chiyoda-ku, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Chiyoda-Ku, Tokyo, JP;
Abstract
In order to provide an optical modulator capable of suppressing generation of mode mismatching light in the Y-multiplexer in the MZ-type waveguide or mixing of the mode mismatching light with the radiation-mode light or the output light, and separately extracting output light and radiation-mode light, there is provided an optical modulator having a Mach-Zehnder type waveguide on a surface of a dielectric substrate, wherein a waveguide after multiplexing in a Y-multiplexer in an output side of the Mach-Zehnder type waveguide is a multiple mode waveguide, a subsidiary output waveguide as a high-order mode waveguideis connected to a portion where the multiple mode waveguide is changed to a main output waveguideas a single mode waveguide, and the multiple mode waveguidehas a length equal to or longer than 150 μm.