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:
Oct. 27, 2020
Filed:
Mar. 05, 2018
Nec Corporation, Minato-ku, Tokyo, JP;
Hidemi Noguchi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
The receiving-side system () includes a smaller number of optical reception front ends () than the number of a plurality of wavelength-multiplexed subcarrier signals. Each of the optical reception front ends () is configured to receive two or a plurality subcarrier signals of the plurality of subcarrier signals. A frequency offset monitoring unit () monitors frequency offsets of the respective subcarrier signals received by the optical reception front end (). A light source frequency control unit () controls at least one of a light source frequency of the transmitting-side system () and a light source frequency of the receiving-side system () based on a result of the monitoring performed by the frequency offset monitoring unit ().