US 12,132,515 B2
Localized span launch power control for network level optimization
Alex W. MacKay, Ottawa (CA); Andrew D. Shiner, Ottawa (CA); Yinqing Pei, Kanata (CA); David W. Boertjes, Nepean (CA); and Fangyuan Zhang, Kanata (CA)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Jul. 19, 2022, as Appl. No. 17/868,209.
Prior Publication US 2024/0031023 A1, Jan. 25, 2024
Int. Cl. H04B 10/079 (2013.01); H04Q 11/00 (2006.01)
CPC H04B 10/07955 (2013.01) [H04B 10/07953 (2013.01); H04Q 11/0066 (2013.01); H04Q 2011/0083 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of optimizing launch power for each span in an optical system with a plurality of spans, the method comprising steps of:
varying power on a span under test of the plurality of spans;
observing measurements related to one or more channels, at corresponding optical receivers; and
one of (i) setting launch power for the span under test and (ii) repeating the varying power step and the observing measurements step, responsive to the measurements wherein the measurements are used as an error signal in the repeating step to obtain a substantially minimized error signal.