84-GBaud/λ PAM-4 Transmission over 20-km using 4-λ LAN-WDM TOSA and ROSA with MLSE Based on Nonlinear Channel Estimation

We demonstrate 168-Gbps/λ PAM-4 transmission over 20-km using 4-λ LAN-WDM TOSA and ROSA with BER below the HD-FEC limit under 24-GHz bandwidth limitation and −39.7-ps/nm chromatic dispersion by applying MLSE based on nonlinear channel estimation.

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