Transmission of 20×440-Gb/s super-nyquist-filtered signals over 3600 km based on single-carrier 110-GBaud PDM QPSK with 100-GHz grid

We successfully transmitted 100GHz-grid, 20 channels single-carrier 440-Gb/s super-Nyquist signal over 3600km. Record all-ETDM-based 110-GBaud PDM-QPSK is coherently detected by a real-time oscilloscope at 160 GSa/s with 65-GHz bandwidth, achieving a net SE of 4b/s/Hz.