In this Letter, we provide a novel maximum a posteriori probability detection-based decision-directed carrier phase estimation(MAP-DDCPE) algorithm. The introduced probability-aware maximum a posteriori probability(MA...In this Letter, we provide a novel maximum a posteriori probability detection-based decision-directed carrier phase estimation(MAP-DDCPE) algorithm. The introduced probability-aware maximum a posteriori probability(MAP) detection avoids the decision errors brought by an ununiform probability distribution, which enhances the phase-tracking ability for the probabilistic shaping(PS) signals. With the proposed MAP-DDCPE, we experimentally demonstrate the 96-channel transmission that delivers 40-GBaud polarization division multiplexing(PDM) PS-64-ary quadrature amplitude modulation(64QAM) signals over the 2-km nested anti-resonant nodeless fiber(NANF). We believe the PS-assisted broadband NANF transmission enabled by the MAP-DDCPE is a promising solution for large-capacity optical communication.展开更多
基金supported by the National Key R&D Program of China (No. 2018YFB1800905)the National Natural Science Foundation of China (Nos. 61935005, 61720106015, 61835002, and 62127802)。
文摘In this Letter, we provide a novel maximum a posteriori probability detection-based decision-directed carrier phase estimation(MAP-DDCPE) algorithm. The introduced probability-aware maximum a posteriori probability(MAP) detection avoids the decision errors brought by an ununiform probability distribution, which enhances the phase-tracking ability for the probabilistic shaping(PS) signals. With the proposed MAP-DDCPE, we experimentally demonstrate the 96-channel transmission that delivers 40-GBaud polarization division multiplexing(PDM) PS-64-ary quadrature amplitude modulation(64QAM) signals over the 2-km nested anti-resonant nodeless fiber(NANF). We believe the PS-assisted broadband NANF transmission enabled by the MAP-DDCPE is a promising solution for large-capacity optical communication.
