The amplified model of erbium-doped fiber amplifier (EDFA) with cross-phase modulation (XPM)

摘要

Based on the rate equations and the power propagation equations, the amplified model is obtained which considers the cross-phase modulation (XPM)-induced intensity fluctuation between pump power and signal power in erbium-doped fiber amplifier (EDFA). Simulation results show: a higher nonlinear coefficient and a stronger pump power cause a stronger XPM in EDFA. Before the optimal length of EDF, the intensity caused by XPM increases with the increasing length, but after the optimal length, the XPM presents saturation. A bigger nonlinear coefficient gamma corresponds to a smaller optimal length and gain, and makes gain saturation more easy. XPM effect will decrease EDFA's amplified efficiency. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 23]