Experimental generation of a 64-QAM by optically aggregating three independent QPSK channels using nonlinear wave mixing of multiple Kerr Comb lines

We experimentally demonstrate an arbitrary optical higher order QAM generation using single stage nonlinear element and Kerr frequency comb. We successfully generated 80-Gbit/s 16-QAM and 120Gbit/s 64-QAM at EVM of 6.5% and 5.5% by multiplexing two and three 40-Gbit/s QPSK signals, respectively.