Patent ID: 8543012

Claim:
A method comprising: receiving, at different signal receivers of a device, an optical signal included in network traffic carried via different channels and destined for a client device; performing, by the device, in-service measurement of first values of original group delay ripples exhibited over select channels of the different channels of the optical signal without impacting the network traffic; determining, by the device, second values of compensating group delay ripples associated with each of the select channels, based on the in-service measurement of the first values; generating, based on the second values, the compensating group delay ripples associated with each of the select channels; injecting, by the different signal receivers of the device, the compensating group delay ripples into a digital signal, corresponding to the optical signal, to generate an output signal in which the original group delay ripples and the compensating group delay ripples sum to zero; and transmitting, from the device, the output signal from the device to the client device.