Demonstration of tunable mitigation of interchannel interference of spectrally overlapped 16-QAM/QPSK data channels using wave mixing of delayed copies

A tunable all-optical inter-channel interference mitigation method is proposed for an overlapped channel system that avoids the need for multi-channel detection. We experimentally demonstrate the system performance improvement for 16QAM and QPSK overlapped channels for both 20/25 Gbaud data and under different channel spacing conditions.