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We numerically investigate that phase-sensitive optical amplifiers drastically reduce nonlinear phase noise and are valid for long-haul transmission of 10-Gbit/s Nyquist binary phase-shift keying signals.
The analysis of a subcarrier optical phase-locked loop (SC-OPLL) is carried out in order to optimize phase-locking performance. A new parameters optimization procedure, useful for OPLL design, is demonstrated theoretically and experimentally. An SC-OPLL based on this procedure has been realized, so a pilot carrier SC-OPLL and a nonlinear SC-OPLL optical receiver have been experimentally constructed...
Effects of phase errors and shot noise on asynchronous coherent optical code division multiple access systems are examined here. It is shown that asynchronous systems have better bit error performance than the synchronous systems.
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