US 11,705,966 B2
Framework for handling signal integrity using ASE in optical networks
Sharfuddin Syed, San Jose, CA (US); Ashwini K. Bhat, Bangalore (IN); and Vasudha Bhaskara, Milpitas, CA (US)
Assigned to Infinera Corporation, San Jose, CA (US)
Filed by Infinera Corporation, San Jose, CA (US)
Filed on Dec. 24, 2021, as Appl. No. 17/561,842.
Application 17/561,842 is a division of application No. 16/827,582, filed on Mar. 23, 2020, granted, now 11,336,369.
Claims priority of provisional application 62/822,489, filed on Mar. 22, 2019.
Prior Publication US 2022/0123834 A1, Apr. 21, 2022
Int. Cl. H04B 10/079 (2013.01)
CPC H04B 10/0793 (2013.01) [H04B 10/0799 (2013.01); H04B 10/07955 (2013.01); H04B 10/07957 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method comprising the steps of:
receiving a signal indicative of a failure of a first channel within a plurality of channels of a transmission signal traversing a signal working path in a network, the signal working path having a headend node, a tail-end node and an intermediate node, the first channel being a failed channel, the channels having the failed channel and an operational channel, the failed channel having a frequency band and a power level prior to failing, the operational channel having encoded data, the signal working path being associated with a protection path, the protection path including the intermediate node, an optical cross-connect, and a transmitter supplying amplified spontaneous emission (ASE) light;
activating the transmitter to supply the ASE light, the ASE light being within a frequency band and having a power level corresponding to the frequency band and power level associated with the failed channel; and
supplying the ASE light to the cross-connect, such that the cross-connect provides a transmission signal including the ASE light.