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. 12, 2023
Filed:
Mar. 12, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
Device cost and electric power consumption are reduced. Nodestoas optical add/drop multiplexers each include AWGsandconnected between light transmission paths as optical fibersandand transponderstoand configured to output optical signals from the light transmission paths to the transponderstothrough ports and transmit optical signals from the transponderstoto the light transmission paths through ports, and an optical couplerconfigured to connect ports of the AWGsandto the transponderstothrough coupling or bifurcation. The channel interval of ports of the AWGsandis multiple times larger than the channel interval of ports of the transpondersto, and transponder signals of a plurality of different wavelengths to and from one or a plurality of the transponderstocan pass through ports of the AWGsand