Dispersion-Unmanaged Transmission of 144-Gb/s PAM-8 and 110-Gb/s PAM-6 Signals over 10/20-km SSMF for DML-Based IM-DD Optics at C Band

We experimentally demonstrate record net 134.6-Gb/s PAM-8 and 102.8-Gb/s PAM-6 signals transmission over 10/20-km SSMF using a 20-GHz commercial C-band DML without dispersion management, using joint sparse Volterra nonlinear equalization and noise whitening DSP techniques.