William L. Kath, Prem Kumar, J. Nathan Kutz and Ruo-Ding Li
Lumped erbium-doped fiber amplifiers have been demonstrated as effective devices for compensating loss in long-distance soliton communication systems. More recently, various filtering schemes have been proposed as a way of reducing the Gordon-Haus jitter present in such systems, thereby increasing the maximum allowable bit-rate distance product. As a possible alternative to erbium-doped amplifiers, the use of lumped phase-sensitive parametric amplifiers has been proposed. A chain of such amplifiers should lead to a higher bit-rate-distance product because no spontaneous emission noise is present.
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