Extending 100G transatlantic optical transmission over legacy DMF fibers using time-domain four-dimensional nonbinary LDPC-coded modulation

The transmission reach of 102.4 Gb/s Nyquist-shaped signal has been experimentally improved to 7,680 km by employing time-domain four-dimensional nonbinary LDPC-coded modulation scheme, resulting in 1,440 km extended distance compared to the counterpart nonbinary LDPC-coded PDM-QPSK.