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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 25,
  • Issue 6,
  • pp. 1431-1440
  • (2007)

Multichip Differential Phase-Shift-Keyed Transmission Over (Non)Linear Optical Channels

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Abstract

The recently introduced multichip differential phase-shift keying (MC-DPSK) optical transmission format, entailing the modulation of relative phases over a moving transmission window of <i>D</i> successive chip intervals, is analytically and numerically analyzed. The maximum-likelihood optimal MC-DPSK receiver is derived and synthesized using integrated-optic Mach–Zehnder delay interferometers, whose electrical outputs are interpreted as generalized Stokes' parameters. The MC-DPSK performance over a nonlinear fiber channel, limited by the combination of amplified spontaneous emission noise and self-phase modulation, is further derived and simulated, demonstrating that the lowest complexity three-chip binary-phase MC-DPSK receiver provides an ~1-dB <i>Q</i>-factor advantage over conventional DPSK.

© 2007 IEEE

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