Abstract
Employing spectrally efficient PolMux-RZ-8PSK modulation format and
single-ended digital coherent detection technique, we demonstrate 8$\,\times\,$114-Gb/s
DWDM transmission over 640 km of SSMF on a 25-GHz grid with record spectral
efficiency of 4.2 bit/s/Hz, utilizing no optical dispersion compensation or
Raman amplification. We show that the distortion caused by the direct square-law
detection of the signal component with single-ended photo detection can be
effectively mitigated by a novel DSP algorithm.
© 2009 IEEE
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