All-optical neuromorphic binary convolution with a spiking VCSEL neuron for image gradient magnitudes  

作　　者：YAHUI ZHANG JOSHUA ROBERTSON SHUIYING XIANG MATĚJ HEJDA JULIÁN BUENO ANTONIO HURTADO 

机构地区：[1]Institute of Photonics,SUPA Department of Physics,University of Strathclyde,Glasgow G11RD,UK [2]State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China

出　　处：《Photonics Research》2021年第5期I0034-I0042,共9页光子学研究（英文版）

基　　金：UKRI Turing AI Acceleration Fellowships Programme(EP/V025198/1);Office of Naval Research Global(ONRGNICOP-N62909-18-1-2027);European Commission(828841-Chip AI-H2020-FETOPEN2018-2020);UK’s EPSRC Doctoral Training Partnership(EP/N509760);National Natural Science Foundation of China(61674119,61974177);China Scholarship Council。

摘　　要：All-optical binary convolution with a photonic spiking vertical-cavity surface-emitting laser(VCSEL) neuron is proposed and demonstrated experimentally for the first time, to the best of our knowledge. Optical inputs, extracted from digital images and temporally encoded using rectangular pulses, are injected in the VCSEL neuron,which delivers the convolution result in the number of fast(<100 ps long) spikes fired. Experimental and numerical results show that binary convolution is achieved successfully with a single spiking VCSEL neuron and that alloptical binary convolution can be used to calculate image gradient magnitudes to detect edge features and separate vertical and horizontal components in source images. We also show that this all-optical spiking binary convolution system is robust to noise and can operate with high-resolution images. Additionally, the proposed system offers important advantages such as ultrafast speed, high-energy efficiency, and simple hardware implementation,highlighting the potentials of spiking photonic VCSEL neurons for high-speed neuromorphic image processing systems and future photonic spiking convolutional neural networks.

关 键 词：optical CONVOLUTION image 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP183[自动化与计算机技术—计算机科学与技术]