Effects of cross-phase modulation on phase jitter in soliton systems with constant dispersion
15 April 2003
The main impairment of differential-phase-shift-keyed communication systems is phase jitter. In wavelength-division-multiplexed systems phase jitter is driven by amplifier noise and mediated by cross-phase modulation.
The variational method is used to derive formulas for the absolute phase variance of an ensemble of solitons and the relative phase variance of ensembles of neighboring solitons. The predictions of these formulas are consistent with the results of numerical simulations.