Abstract
Digital backpropagation (BP) is a universal method for jointly
compensating dispersion and nonlinear impairments in optical fiber and is
applicable to signals of any modulation format. In this paper, we compare
single carrier (SC) versus orthogonal frequency-division multiplexing (OFDM)
for polarization-multiplexed transmission. We show that at realistic data
rates and transmission distances, polarization mode dispersion does not
significantly degrade the performance of BP and can be mitigated by a
post-BP linear equalizer. Dispersion unmanaged transmission can
significantly reduce nonlinearity, and in this transmission regime, SC and
OFDM have similar nonlinear tolerance. Multichannel BP is effective at
mitigating interchannel nonlinearity for point-to-point links.
© 2010 IEEE
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