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:
Mar. 23, 2021
Filed:
Feb. 05, 2020
Tdk Corporation, Tokyo, JP;
Shinji Iwatsuka, Tokyo, JP;
Kenji Sasaki, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An object of the present invention is to provide a single drive type optical modulator having good high-frequency characteristics and reduced wavelength chirp of the modulated light. An optical modulatoris provided with a Mach-Zehnder optical waveguideincluding first and second optical waveguides, a buffer layercovering the first and second optical waveguides, and an electrode layerincluding first and second ground electrodesand a signal electrodepositioned between the first and second ground electrodesin a plan view, the signal electrodehas a first lower surface Scovering the first optical waveguidethrough the buffer layer, the first ground electrodehas a first lower surface Scovering the second optical waveguidethrough the buffer layerand a second lower surface Spositioned above the first lower surface S, and a gap Gbetween the signal electrodeand the second ground electrodeis larger than a gap Gbetween the signal electrodeand the first ground electrode