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:
Mar. 30, 2021
Filed:
Sep. 20, 2019
Infinera Corporation, Sunnyvale, CA (US);
Infinera Corporation, San Jose, CA (US);
Abstract
Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, an apparatus includes an optical tap coupled to an optical communication path carrying a modulated optical signal carrying a plurality of optical subcarriers. The optical tap has a first output configured to supply a first portion of the modulated optical signal and a second output configured to supply a second portion of the modulated optical signal. The plurality of optical subcarriers are amplitude modulated based on control data at a first frequency, and each of the plurality of optical subcarriers is modulated to carry user data at a second frequency greater than the first frequency. The apparatus is configured to supply the control based on the first portion of the modulated optical signal.