A software-defined optical receiver is implemented on an off-the-shelf commercial graphics processing unit (GPU). The receiver provides real-time signal processing functionality to process 1 GBaud minimum phase (MP) 4-, 8-, 16-, 32-, 64-, 128-ary quadrature amplitude modulation (QAM) as well as geometrically shaped (GS) 8- and 128-QAM signals using Kramers-Kronig (KK) coherent detection. Experimental validation of this receiver over a 91~km field-deployed optical fiber link between two Tokyo locations is shown with detailed optical signal-to-noise ratio (OSNR) investigations. A net data rate of 5 Gbps using 64-QAM is demonstrated.
@article{arxiv.2108.07004,
title = {Real-time Transmission of Geometrically-shaped Signals using a Software-defined GPU-based Optical Receiver},
author = {Sjoerd van der Heide and Ruben S. Luis and Sebastiaan Goossens and Benjamin J. Puttnam and Georg Rademacher and Ton Koonen and Satoshi Shinada and Yoshinari Awaji and Alex Alvarado and Hideaki Furukawa and Chigo Okonkwo},
journal= {arXiv preprint arXiv:2108.07004},
year = {2022}
}