DAC-free ultra-low-power dual-polarization 64-QAM transmission with InP IQ segmented MZM module

We demonstrate for the first time 32 GBd 64-QAM signal generation without the usage of DACs. The dual-polarization 64-QAM signal is transmitted error-free over 80 km of SSMF with 7.8 pJ/bit record low energy consumption.

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