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. 11, 2021
Filed:
Feb. 24, 2020
Fujitsu Optical Components Limited, Kanagawa, JP;
Tdk Corporation, Tokyo, JP;
Yasuhiro Ohmori, Kanagawa, JP;
Masaharu Doi, Kanagawa, JP;
Shintaro Takeuchi, Kanagawa, JP;
Takehito Tanaka, Kanagawa, JP;
Yoshinobu Kubota, Kanagawa, JP;
Shinji Iwatsuka, Tokyo, JP;
Kenji Endou, Tokyo, JP;
Hiroki Hara, Tokyo, JP;
Toshinori Matsuura, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An optical modulator is provided with a ridge-shaped optical waveguide formed of a dielectric thin film having electro-optic effect, a buffer layer covering the optical waveguide, a signal electrode formed on the buffer layer so as to be opposed to the optical waveguide through the buffer layer; a ground electrode formed on the buffer layer together with the signal electrode, and a dielectric film having a higher dielectric constant than air and covering at least a part of exposed surfaces of the signal electrode and ground electrode and exposed surfaces of the buffer layer.