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Multiple photonic systems show great promise for providing practical yet powerful hardware substrates for neuromorphic computing. Among those, delay-based systems offer -through a time-multiplexing technique - a simple technological implementation route. We discuss our advances in the development of passive coherent fibre-ring cavities and semiconductor lasers with integrated delay for reservoir computing. Time-multiplexed systems are also highly suitable for coherent Ising machines as they allow to implement a fully interconnected large scale system with few components. We have recently proposed a system based on opto-electronic oscillators subjected to self-feedback with improved calculation time and solution quality.
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Guy Van der Sande, Fabian Böhm, Krishan Harkhoe, Jaël Pauwels, Peter Bienstman, Thomas Van Vaerenbergh, Guy Verschaffelt, "Time-multiplexed optical systems for reservoir computing and coherent Ising machines," Proc. SPIE 11804, Emerging Topics in Artificial Intelligence (ETAI) 2021, 118041Q (2 September 2021); https://doi.org/10.1117/12.2594700