Optical phase encoding in pulsed approach to reservoir computing

The exploitation of the full structure of multimode light fields enables compelling capabilities in many fields including classical and quantum information science. We exploit data-encoding on the optical phase of the pulses of a femtosecond laser source for a photonic implementation of a reservoir computing protocol. Rather than intensity detection, data-reading is done via homodyne detection that accesses combinations of amplitude and phase of the field. Numerical and experimental results on NARMA tasks and laser dynamic predictions are shown. We discuss perspectives for quantum enhanced protocols. ; European Research Council under the Consolidator Grant COQCOoN (Grant No. 820079) and the Agence Nationale de la Recherche with support of the Direction Generale de l’Armement (LASAGNE ANR-16-ASTR-0010-03). We acknowledge the Spanish State Research Agency, through the María de Maeztu project CEX2021-001164-M funded by the MCIN/AEI/10.13039/501100011033 and through the COQUSY project PID2022-140506NB-C21 funded by MCIN/AEI/10.13039/501100011033, MINECO through the QUANTUM SPAIN project, and EU through the RTRP - NextGenerationEU within the framework of the Digital Spain 2025 Agenda. ; With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2021-001164-M). ; No