Nonlinear equalizer for 112-Gb/s SSB-PAM4 in 80-km dispersion uncompensated link

We present a blindly adaptive nonlinear channel equalizer that effectively compensates nonlinearity in SSB-PAM4 transceiver components. The proposed scheme is demonstrated over 56GBaud PAM4 transmission over 80km dispersion uncompensated link with low BER near 10−4.