Training and Inference of Optical Neural Networks with Noise and Low-Bits Control
2021
Danni Zhang | Yejin Zhang | Ye Zhang | Yanmei Su | Junkai Yi | Pengfei Wang | Ruiting Wang | Guangzhen Luo | Xuliang Zhou | Jiaoqing Pan
Optical neural networks (ONNs) are getting more and more attention due to their advantages such as high-speed and low power consumption. However, in a non-ideal environment, the noise and low-bits control may heavily lead to a decrease in the accuracy of ONNs. Since there is AD/DA conversion in a simulated neural network, it needs to be quantified in the model. In this paper, we propose a quantitative method to adapt ONN to a non-ideal environment with fixed-point transmission, based on the new chip structure we designed previously. An MNIST hand-written data set was used to test and simulate the model we established. The experimental results showed that the quantization-noise model we established has a good performance, for which the accuracy was up to about 96%. Compared with the electrical method, the proposed quantization method can effectively solve the non-ideal ONN problem.
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