We demonstrate 4×128Gb/s Faster-than-Nyquist 16-QAM WDM signal transmission with heterodyne detection using signal-signal beat interference cancellation. The overall BER achieves 2.7×10−3 (< 7% HD-FEC) after 80km SSMF transmission. The net spectral efficiency is as high as 4.04bit/s/Hz for one polarization.

© 2017 Optical Society of America

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