Abstract
Parametric amplifiers have been proposed1 as an alternative to lumped erbium-doped amplifiers for long-distance optical pulse propagation in fibers. Although filtering techniques2 have been demonstrated to suppress (he bit-rate limitation caused by the Gordon-Haus jitter3—the random walk of solitons caused by spontaneous emission noise of the erbium amplifiers or by initial fluctuations in the soli ton parameters—it should be possible for a chain of lumped parametric amplifiers to have higher possible bit-rates because no such amplifier noise is present in such a system.1
© 1993 Optical Society of America
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