600G PAM4 transmission using a 4-lambda CWDM TOSA based on controlled-ISI pulse shaping and Tomlinson-Harashima precoding

摘要

We demonstrate a high capacity PAM4 transmission over 2 km using a 4-λ CWDM TOSA. A net rate of 605.6 Gb/s excluding 7% hard-decision FEC overhead is achieved using transmitter-side controlled-ISI pulse shaping, Tomlinson-Harashima precoding and receiver-side linear equalizer.