Optical computers will be more interesting if they take advantage of phenomena that are unique to optics. In this respect, telecommunications hardware might have something to offer.
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Woods, D., Naughton, T. Photonic neural networks. Nature Phys 8, 257–259 (2012). https://doi.org/10.1038/nphys2283
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DOI: https://doi.org/10.1038/nphys2283
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