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:
Dec. 01, 2009
Filed:
Jun. 22, 2006
Matthew L. Mitchell, Sunnyvale, CA (US);
Robert B. Taylor, Charleston, SC (US);
Edward E. Sprague, Woodside, CA (US);
Matthew L. Mitchell, Sunnyvale, CA (US);
Robert B. Taylor, Charleston, SC (US);
Edward E. Sprague, Woodside, CA (US);
Infinera Corporation, Sunnyvale, CA (US);
Abstract
A system, apparatus and method are described for controlling the gain across one or more amplifier nodes within an optical span. In one embodiment, a fast local amplifier constant gain control loop is provided that maintains a constant gain across an amplifier node for each of the channels within an optical signal. A slow link level gain setting control loop is provided to set and/or adjust the target gain on the amplifier node(s). A gain adjust sequence is performed by the slow link level gain setting control loop to adjust the target gain(s) in response to various events and mechanisms. A 'time of flight' protection method is also provided to ensure consistency between the fast local amplifier gain control loop and the slow link level gain setting control loop.