Abstract
Closed-form expressions for nonlinear transmission performance
of coherent optical OFDM systems (CO-OFDM) with frequency guard band are derived.
The analytical expressions have been substantiated by numerical simulations
using split-step method for various frequency spacings and fiber dispersion
maps. The analytical solution shows good estimation accuracy, and the average
absolute difference of Q factor between analytical results and numerical simulations
are below 0.3 dB for the three typical systems simulated. Using this expression,
the dependence of system performance for CO-OFDM on the frequency guard band
spacing and fiber dispersion is also investigated analytically to provide
insights for system design.
© 2012 IEEE
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