Abstract

The effect of ion pairs in high-concentration erbium-doped fibers on slow- and fast-light propagation enabled by coherent population oscillations at room temperature has been experimentally investigated. We find that an increase of the erbium ion concentration increases the fractional advancement although it degrades the bandwidth of the modulated signals that propagate at superluminal velocities due to the presence of ion pairs in the fiber.

© 2008 Optical Society of America

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