Hybrid Probabilistic-Geometric Shaped LDPC-coded PM- 16QAM in 140 km DWDM Metro Network Communication

Abstract

We implement a hybrid probabilistic-geometric shaping (PGS) LDPC-coded PM-16QAM in a 140 km DWDM metro-network-communication link. We experimentally demonstrate that hybrid PGS LDPC-coded-modulation scheme can provide 0.95 dB improvement over corresponding uniform-distribution-based scheme.