@ARTICLE{ iet:/content/journals/10.1049/iet-cds.2013.0421, author = {Verica Radisavljevic-Gajic}, affiliation = {Department of Mechanical Engineering, Villanova University, 800 E. Lancaster Avenue, Villanova, PA 19085, USA}, keywords = {optical communication network;feedback control;feedforward control;steady-state gain scheduling technique;nonlinear integral control;erbium-doped fibre amplifier;average inversion level;electronic automatic gain control;photon power transient;Er;simple linearised flrst-order observer;EDFA;signal add-drop;signal power transient control;nominal pump power;}, ISSN = {1751-858X}, language = {English}, abstract = {In this study the authors present a novel technique for control of signal power transients caused by signal add/drops in optical communication networks with erbium-doped fibre amplifiers (EDFAs). The approach utilises the electronic automatic gain control that combines both feedback and feedforward control of EDFA. Feedback control is non-linear integral control and feedforward control is a steady-state gain scheduling technique. The feedback non-linear control requires information about the average inversion level that is obtained via a simple linearised first-order observer. The scheduling variable used is the nominal pump power needed to keep the average inversion level at the desired value at steady state and the input signal powers given at particular wavelengths. In the simplified gain scheduling version, the scheduling variable is the total input signal power. Simulation examples indicate that the proposed controller completely eliminates at steady state the photon power transients caused by signal add/drops with the steady state being reached within a few milliseconds.}, title = {Non-linear integral control of photon power transients in optical communication networks with erbium-doped fibre amplifiers}, journal = {IET Circuits, Devices & Systems}, issue = {5}, volume = {8}, year = {2014}, month = {September}, pages = {412-420(8)}, publisher ={Institution of Engineering and Technology}, copyright = {© The Institution of Engineering and Technology}, url = {https://digital-library.theiet.org/;jsessionid=1flmg0eigab3c.x-iet-live-01content/journals/10.1049/iet-cds.2013.0421} }