All optical neural network
An optical and neuron technology, applied in the field of deep learning artificial neural network
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[0045] Layers of artificial neurons can be simulated in the optical path using optical components to perform linear and nonlinear transformations within the optical medium. Linear summation can be achieved by modulating optical amplitude or phase at various positions in the signal (e.g., multiplying components of the input signal by weights) and then combining the modulated optical signals to achieve a linear summation (e.g., combining the weighted components to produce a weighted sum) . The different optical neurons of the layer can be implemented using different diffraction gratings to separate the components of the input signal according to the various optical neurons in the layer. Optical nonlinear transformations can be performed by tuning nonlinear optical media to have electromagnetically induced transparency (EIT) properties that, when illuminated by the output of a linear transformation, function similarly to conventional activation functions. In other words, the cou...
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