Abstract
Employing time-domain hybrid QPSK-8QAM and training-assisted phase recovery, we successfully transmitted eight 495-Gb/s DWDM signals at net 4.125 bit/s/Hz spectral efficiency (SE) over 120×100km of ultra-large-area fiber, achieving a record SE·distance product of 49500 (bit/s/Hz) km.
© 2013 Optical Society of America
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