Experimental validation of clipping combined with digital resolution enhancer for high speed optical transmission

A digital resolution enhancer combined with clipping is experimentally validated by transmitting single channel 600 Gb/s 64-QAM and WDM 460 Gb/s 128-QAM over 75 km, allowing to reduce the DAC's physical number of bits to 3. Low resolution DACs will play an important role in low-power transmitters.