EDFAs gain and noise figure dependence on the fiber length: comparison between L and C bands

In this paper we perform a theoretical study via simulations of both, Cand L-EDFAs dependence on the fiber length. The model used in all the simulations results here introduced is the well-known modeling of erbium ions as a two level homogeneously broadened system. The propagation equations for the light, coupled with the rate equation for the excited state population of the erbium ions, are solved in both possible directions into the fiber. Numerical simulations give the gain and NF of the amplifier for any input signal and pump powers configuration.