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. 27, 2022
Filed:
Aug. 30, 2019
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Device Innovations, Inc., Yokohama, JP;
Munetaka Kurokawa, Osaka, JP;
Yasushi Fujimura, Osaka, JP;
Ken Ashizawa, Yokohama, JP;
Satoru Kanemaru, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Device Innovations, Inc., Yokohama, JP;
Abstract
A coherent receiver comprising: a signal port receiving the signal light that has two polarization components at right angles each other; a polarization dependent beam splitter (PBS) that splits the signal light into two portions depending on the polarizations contained in the signal light; a beam splitter (BS) that splits the local light into two portions; a multi-mode interference (MMI) device that interferes between one of the two portions of the signal light and one of the two portions of the local light; optical components provided between the PBS and the MMI device; and wherein the PBS splitting a first wavelength range of the signal light and a second wavelength range outside the first wavelength range.