Reinforcement learning in a large-scale photonic recurrent neural network

Photonic neural network implementation has been gaining considerable attention as a potentially disruptive future technology. Demonstrating learning in large-scale neural networks is essential to establish photonic machine learning substrates as viable information processing systems. Realizing photo...

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Bibliographic Details
Published in:Optica 2018-06, Vol.5 (6), p.756-760
Main Authors: Bueno, J., Maktoobi, S., Froehly, L., Fischer, I., Jacquot, M., Larger, L., Brunner, D.
Format: Article
Language:English
Subjects:
Optics
Physics
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Summary:Photonic neural network implementation has been gaining considerable attention as a potentially disruptive future technology. Demonstrating learning in large-scale neural networks is essential to establish photonic machine learning substrates as viable information processing systems. Realizing photonic neural networks with numerous nonlinear nodes in a fully parallel and efficient learning hardware has been lacking so far. We demonstrate a network of up to 2025 diffractively coupled photonic nodes, forming a large-scale recurrent neural network. Using a digital micro mirror device, we realize reinforcement learning. Our scheme is fully parallel, and the passive weights maximize energy efficiency and bandwidth. The computational output efficiently converges, and we achieve very good performance
ISSN:2334-2536
2334-2536
DOI:10.1364/OPTICA.5.000756