Power efficient transmission of 320 Gb/s over 17545 km, and 560 Gb/s over 6050 km using 98 GBd QPSK and 64QAM and CMOS technology

We demonstrate power efficient 320 Gb/s transmission over 17,545 km, and 560 Gb/s over 6,050 km, using 98 GBd PDMQPSK/64QAM and CMOS DAC technology, while applying digital and optical pre-emphasis. At the receiver side the standard digital signal processing is employed. nonlinear compensation was avoided.