9 November 1993 Holographic neurocomputer for backpropagation based on cascaded-grating holography
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We describe recent results for implementation of the backpropagation neural network on an experimental optical neurocomputer developed under ARPA sponsorship. Weights are stored holographically in a photorefractive crystal using a recording method which eliminates crosstalk due to Bragg degeneracy and permits full utilization of the input and output. Experimental results are discussed for handwritten digit recognition.
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Yuri Owechko, Bernard H. Soffer, "Holographic neurocomputer for backpropagation based on cascaded-grating holography", Proc. SPIE 2026, Photonics for Processors, Neural Networks, and Memories, (9 November 1993); doi: 10.1117/12.163595; https://doi.org/10.1117/12.163595

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