Abstract
We have analytically derived the correlation functions of intrachannel
four-wave mixing (IFWM)-induced phase and amplitude noises in phase-modulated
optical communication systems. The phase and amplitude noises are correlated
with each other for binary phase-shift keying (PSK) systems but uncorrelated
for $M$-ary PSK systems
with $M>2$. We have also
derived analytical approximations to the probability distribution of IFWM-induced
phase noise for PSK and differential PSK systems. Furthermore, we have studied
the performance of an optimal linear phase-noise predictor derived from the
IFWM-induced phase-noise autocorrelation function. This yields a performance
improvement of 1.8dB when IFWM-induced phase noise is the
dominant impairment, and an improvement of 0.8 to 1.2 dB in the presence of
amplified spontaneous emission noise and nonlinear phase noise in typical
terrestrial links.
© 2008 IEEE
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