Spectrally-Efficient Seed-Lightwave-Distribution System using Space-Division-Multiplexed Distribution Channel for Multi-core 3-Mode-Multiplexed DP-64QAM Transmission

We demonstrate the possibility to eliminate carrier phase estimation DSP in mode-multiplexed DP-64QAM transmission by distributing low-phase-noise seed lightwave through MCF cores. Penalty of seed distribution over 90 km MCF with ambient data signals was sufficiently small.