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Opt Lett. 2007 Apr 15;32(8):906-8.

Reducing pulse distortion in fast-light pulse propagation through an erbium-doped fiber amplifier.

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  • 1The Institute of Optics, University of Rochester, Rochester, NY 14627, USA.


When a pulse superposed on a cw background propagates through an erbium-doped fiber amplifier with a negative group velocity, either pulse broadening or pulse compression can be observed. These effects can be explained in terms of two competing mechanisms: gain recovery and pulse spectrum broadening. The distortion of the pulse shape caused by these effects depends on input pulse width, pump power, and background-to-pulse power ratio. With the proper choice of these three parameters, we can obtain significant pulse advancement with minimal pulse distortion.

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