800-Gbps PAM-4 O-band Transmission through 2-km SMF using 4λ LAN-WDM TOSA with MLSE Based on Nonlinear Channel Estimation and Decision Feedback

Abstract

We demonstrate 224-Gbps/λ 2-km transmission using 4-ch LAN-WDM TOSA with integrated SOAs and EADFB lasers. We achieve a BER below the HD-FEC limit for all channels in the 10-dB bandwidth of 34.8-GHz and chromatic dispersion of –4.2-ps/nm with advanced nonlinear MLSE based on decision feedback.