Sub-Baudrate Sampling at DAC and ADC for Next Generation 200G Systems

We investigate generation and detection of signals with baudrate well above the DAC and ADC sampling rates for 200-Gbps applications. We demonstrate 112 GBd OOK detection with 88 GS/s DAC and 92 GS/s ADC; as well as 100 GBd PAM4 generation with under 90 GS/s DAC