Optical neural network
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United States of America
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Jun 25, 2024
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app pub date -
Dec 8, 2020
filing date -
Dec 8, 2020
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Abstract
An optical neural network having at least one layer including: an optical transmission element arranged such that the signal of each node passes through the optical transmission element in both forward and backpropagation; wherein the optical transmission element comprises a saturable optical absorption material or a saturable optical gain material, having a saturation threshold-power; wherein optical signals propagating in a forward direction have a power below the saturation threshold-power at least some of the time, such that transmission of the optical signal through the optical transmission element in a forward direction is nonlinear; and wherein optical signals propagating in a backward direction have a power below a second threshold-power, lower than the saturation threshold-power, and transmission of the optical signal in a backward direction through the optical transmission element is approximately linear.
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