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:
Apr. 27, 2021
Filed:
Feb. 24, 2020
Tdk Corporation, Tokyo, JP;
Fujitsu Optical Components Limited, Kanagawa, JP;
Shinji Iwatsuka, Tokyo, JP;
Kenji Endou, Tokyo, JP;
Hiroki Hara, Tokyo, JP;
Toshinori Matsuura, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Yasuhiro Ohmori, Kanagawa, JP;
Masaharu Doi, Kanagawa, JP;
Shintaro Takeuchi, Kanagawa, JP;
Takehito Tanaka, Kanagawa, JP;
Yoshinobu Kubota, Kanagawa, JP;
TDK CORPORATION, Tokyo, JP;
FUJITSU OPTICAL COMPONENTS LIMITED, Kanagawa, JP;
Abstract
An optical modulator is provided with a substrate, first and second optical waveguides each formed of a ridge-shaped electro-optic material film and disposed so as to be mutually adjacent on the substrate, a buffer layer covering upper surfaces of the first and second optical waveguides, first and second signal electrodes provided above the buffer layer so as to be opposed respectively to the first and second optical waveguides, and a dielectric layer covering at least one of a part of an exposed surface of the first signal electrode and a part of an exposed surface of the second signal electrode, and a part of an upper surface of the buffer layer. Differential signals are applied to the first and second signal electrodes.