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:
Sep. 01, 2026
Filed:
Jan. 10, 2024
Tdk Corporation, Tokyo, JP;
Hiroki Hara, Tokyo, JP;
Yasuhiro Takagi, Tokyo, JP;
Atsushi Shimura, Tokyo, JP;
Jiro Yoshinari, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An optical modulator is a Mach-Zehnder-type optical modulator having a substrate and an optical waveguide layer including a lithium niobate film formed on the substrate. The optical waveguide layer includes a plurality of flat portions and n ridge portions arranged between the flat portions to be adjacent, where n is two or more. Each of the n ridge portions includes a main waveguide to which visible light is input, a first multimode interference waveguide through which the main waveguide is branched into a first and a second optical branch waveguide, and a second multimode interference waveguide through which the first and the second optical branch waveguide are coupled to form a coupling waveguide. Visible light beams having different wavelengths are input to the n ridge portions. The first multimode interference waveguide and the second multimode interference waveguide have shorter lengths when input light having a longer wavelength is transmitted.