The effect of propagation nonlinearities on the information capacity of WDM optical fiber systems: cross-phase modulation and four-wave mixing

The information capacity of a wavelength-division multiplexed optical fiber communication system is estimated in a model incorporating the nonlinear propagation effects of cross-phase modulation (XPM) and four-wave mixing (FWM). Physical models for propagation are used to calculate statistical prope...

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Bibliographic Details
Published in:Physica. D 2004-02, Vol.189 (1), p.81-99
Main Authors: Wegener, L.G.L., Povinelli, M.L., Green, A.G., Mitra, P.P., Stark, J.B., Littlewood, P.B.
Format: Article
Language:English
Subjects:
Cross-phase modulation
Exact sciences and technology
Fiber optics
Four-wave mixing
Information capacity
Physics
Wavelength-division multiplexing
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Summary:The information capacity of a wavelength-division multiplexed optical fiber communication system is estimated in a model incorporating the nonlinear propagation effects of cross-phase modulation (XPM) and four-wave mixing (FWM). Physical models for propagation are used to calculate statistical properties of the conditional probability distribution relating input and output in a single WDM channel. A rigorous lower bound to the information capacity is found for coherent communication, in which both the signal phase and amplitude encode information. An approximate lower bound is computed for incoherent communication, in which only the amplitude is used. The results provide physical insight into the manner in which nonlinearities degrade the information capacity.
ISSN:0167-2789
1872-8022
DOI:10.1016/j.physd.2003.09.038