Abstract

We propose a numerical method to accurately discriminate the influence of the different intrachannel nonlinear effects occurring in $40\mathrm{Gbit}∕\mathrm{s}$ optical transmissions, following an analogy with methods used to discriminate WDM interchannel effects. In contrast to other studies showing the predominance of intrachannel cross-phase modulation when low-dispersion fibers are used, in our study intrachannel four-wave mixing is the most penalizing effect in all investigated cases.

© 2006 Optical Society of America

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