56-Gb/s Optical SSB PAM-4 Transmission over 800-km SSMF Using DDMZM Transmitter and Simplified Direct Detection Kramers-Kronig Receiver

We propose and experimentally demonstrate a simplified direct detection Kramer-Kronig (DD-KK) receiver followed by a Volterra filter to mitigate the SSBI and fiber nonlinearity in a 56-Gb/s optical SSB PAM-4 transmission over 800-km SSMF.