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- W4319338552 abstract "Coherent integrated photonic neural networks (IPNNs) are increasingly being explored for rapidly growing artificial intelligence applications. However, the principal roadblocks in the scalability of IPNNs are their large area footprint and high tuning power consumption during both training and inferencing. In deep neural networks (DNNs), software techniques to prune redundant weights are often utilized to reduce resource (e.g., memory, computation, and power) overheads. However, due to the complex nature in which the software weights are mapped to the building blocks of IPNNs, prior efforts to apply existing pruning approaches to IPNNs have been ineffective. We present CHAMP and LTPrune, two novel hardware-aware pruning techniques for IPNNs. Using a case study of three IPNNs with different footprints, we show that both these methods can prune more than 99% of the phase angles (which are similar to the weight parameters in DNNs). We also analyze the performance of the pruned IPNNs under phase uncertainties and present a comparative analysis of the two methods to enable advanced hardware-software-assisted design-optimization techniques for IPNNs. To expedite pruning, we also propose HybridPrune, where CHAMP and LTPrune are used in conjunction to obtain similar network sparsity as standalone-LTPrune but with up to 78.3% fewer retraining epochs." @default.
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- W4319338552 date "2023-03-01" @default.
- W4319338552 modified "2023-10-16" @default.
- W4319338552 title "Pruning Coherent Integrated Photonic Neural Networks" @default.
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- W4319338552 doi "https://doi.org/10.1109/jstqe.2023.3242992" @default.
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