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Fast light in erbium doped fibers based on coherent population oscillations with nonlinear negative absorption.

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Superluminal propagation of signals (wavelengths 1536 and 787 nm) in erbium-doped fibers without additional pump is demonstrated. We explain this phenomenon within the coherent population oscillations model in a medium with nonlinear negative absorption.

© 2011 Optical Society of America

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