An all-optical neuron with sigmoid activation function

被引：172

作者：

Mourgias-Alexandris, G. ^{[1
,2
]}

Tsakyridis, A. ^{[1
,2
]}

Passalis, N. ^{[1
]}

Tefas, A. ^{[1
]}

Vyrsokinos, K. ^{[2
,3
]}

Pleros, N. ^{[1
,2
]}

机构：

[1] Aristotle Univ Thessaloniki, Dept Informat, Thessaloniki 54124, Greece

[2] Balkan Ctr, Ctr Interdisciplinary Res & Innovat CIRI AUTH, Bldg A&B,10th Km Thessaloniki Therrni Rd,POB 8318, GR-57001 Thessaloniki, Greece

[3] Aristotle Univ Thessaloniki, Dept Phys, Thessaloniki 54124, Greece

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 07期

基金：

欧盟地平线“2020”;

关键词：

INTERFEROMETER;

D O I：

10.1364/OE.27.009620

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present an all-optical neuron that utilizes a logistic sigmoid activation function, using a Wavelength-Division Multiplexing (WDM) input & weighting scheme. The activation function is realized by means of a deeply-saturated differentially-biased Semiconductor Optical Amplifier-Mach-Zehnder Interferometer (SOA-MZI) followed by a SOA-Cross-Gain-Modulation (XGM) gate. Its transfer function is both experimentally and theoretically analyzed, showing excellent agreement between theory and experiment and an almost perfect fitting with a logistic sigmoid function. The optical sigmoid transfer function is then exploited in the experimental demonstration of a photonic neuron, demonstrating successful thresholding over a 100psec-long pulse sequence with 4 different weighted-and-summed power levels. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：9620 / 9630

页数：11