Partial Response O-band EML Transmission Beyond 300-GBd with a 128/256 GSa/s DAC

We experimentally compared 128 and 256-GSa/s DACs using partial response signaling. Transmission of 310-GBd OOK is demonstrated with a single 128 GSa/s DAC for up to 5-km without optical amplification (net 268.84Gb/s, AIR ≈ 300Gb/s). © 2021 The Authors