Method for changing a number of channels in an optical communication network

摘要

The invention relates to a method for changing a number of channels in an optical communication network transmitting, through an optical transmission line, a light signal having a variable number of channels associated with different wavelengths and amplifying the light signal by an optical amplifier, comprising the steps of transmitting a second light signal indicating initiation of changing the number of channels in the light signal; upon receiving the second light signal in the optical amplifier, starting preparation of changing the number of channels; and controlling the optical amplifier to amplify the light signal with an approximately constant gain during the preparation of changing the number of channels.