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:
Jul. 28, 2026
Filed:
Dec. 14, 2023
Tdk Corporation, Tokyo, JP;
Yasuhiro Takagi, Tokyo, JP;
Hiroki Hara, Tokyo, JP;
Atsushi Shimura, Tokyo, JP;
Hajime Utsunomiya, Tokyo, JP;
Jiro Yoshinari, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An optical coupler includes: light input ports on a first side surface; monitoring light output ports on a second side surface; one light output port on a third side surface; and multimode-interference-type optical coupling parts, a first multimode-interference coupling part is connected to a first light-input-side waveguide on the input side, and to a first monitoring-light-output-side waveguide and a first connecting waveguide on the output side, the second multimode-interference coupling part is connected to a second light-input-side waveguide and the first connecting waveguide on the input side, and to a second monitoring-light-output-side waveguide and a second connecting waveguide on the output side, and the third multimode-interference coupling part is connected to a third light-input-side waveguide and the second connecting waveguide on the input side, and connected to a third monitoring-light-output-side waveguide and a light-output-port-connected waveguide on the output side, and the monitoring-light-output-side waveguides are free of an intersection.