ERBIUM-DOPED SILICA FIBER MODELING WITH OVERLAPPING FACTORS

A simple model describing the evolution of pump, signal, and amplified spontaneous emission powers in an erbium-doped silica fiber is presen ted. The model is based on overlapping factors, depending on pump- and signal-coupled powers, which are systematically studied. Accurate res ults for gain and amplified spontaneous emission are obtained when thi s model is used. Experiments to measure the characteristic parameters of the fiber appearing in the model are described. Two main advantages of this model are found: computation time is considerably reduced and fiber characterization does not make it necessary to measure the para meters of the fiber as a function of radial or azimuthal coordinates.