Single carrier 400g WDM transmission over 2,424-km EDFA-amplified link using 100gbe-grade analog components and 4-pam to 16-qam conversion

Single carrier 400G signal generation and detection is achieved using 100GbE-grade modulator and photodetectors with novel 4-PAM to 16-QAM signal emulation. Eight DP-16QAM channels are transmitted using EDFA-only amplification over 2,424-km, achieving 5.33-b/s/Hz spectral efficiency.