Driver-Free Net-422-Gbps/λ PAM transmission based on TFLN Modulator, Advanced DSP and single DAC with the Highest Net Information Rate in 400G/λ IM/DD

We report ultrahigh-speed transmission of net-422-Gbps/λ PAM-20 signals over 0.5-km SSMF in C-band, based on only one-DAC without any electrical amplifications, achieving a record net information rate (bits/symbol) in 400G/λ IM/DD.