Abstract
During the development of fiber-based optical amplifiers, particularly erbium-doped fiber amplifiers (EDFA), computer models have been used to predict fiber performance, improve fiber design and expedite amplifier development. The simplest EDFA models are based on the numerical solution of basic rate equation for a three-level laser medium in the presence of various boundary conditions. Some of these models directly include the radial distribution of the dopant and mode intensity while others incorporate them using simple overlap integrals as an approximation. Material parameters such as lifetimes, cross-sections and concentrations are sometimes used in these models or they are replaced by measured parameters such as small-signal gain, small-signal absorption and saturation power. Even simpler analytic
© 1996 Optical Society of America
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