An all-optical neuron with sigmoid activation function.
George Mourgias-Alexandris,Apostolos Tsakyridis,Nikolaos Passalis,Anastasios Tefas,Konstantinos Vyrsokinos,Nikos Pleros +5 more
Reads0
Chats0
TLDR
An all-optical neuron is presented that utilizes a logistic sigmoid activation function, using a Wavelength-Division Multiplexing (WDM) input & weighting scheme, showing excellent agreement between theory and experiment and an almost perfect fitting with a logismoid function.Abstract:
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.read more
Citations
More filters
Journal ArticleDOI
Photonics for artificial intelligence and neuromorphic computing
Bhavin J. Shastri,Bhavin J. Shastri,Alexander N. Tait,Alexander N. Tait,T. Ferreira de Lima,Wolfram H. P. Pernice,Harish Bhaskaran,C.D. Wright,Paul R. Prucnal +8 more
TL;DR: In this paper, the authors review recent advances in integrated photonic neuromorphic systems, discuss current and future challenges, and outline the advances in science and technology needed to meet those challenges.
Journal ArticleDOI
Photonics for artificial intelligence and neuromorphic computing
Bhavin J. Shastri,Alexander N. Tait,Thomas Ferreira de Lima,Wolfram H. P. Pernice,Harish Bhaskaran,C. David Wright,Paul R. Prucnal +6 more
TL;DR: Recent advances in integrated photonic neuromorphic neuromorphic systems are reviewed, current and future challenges are discussed, and the advances in science and technology needed to meet those challenges are outlined.
Journal ArticleDOI
An optical neural chip for implementing complex-valued neural network.
Hua Zhang,Mile Gu,Xudong Jiang,Jayne Thompson,Hong Cai,Stefano Paesani,Raffaele Santagati,Anthony Laing,Yi Zhang,Man-Hong Yung,Yuzhi Shi,F. K. Muhammad,Guo-Qiang Lo,Xianshu Luo,B. Dong,D. L. Kwong,Leong Chuan Kwek,Leong Chuan Kwek,Leong Chuan Kwek,Ai Qun Liu +19 more
TL;DR: In this paper, an optical neural chip (ONC) that implements truly complex-valued neural networks is presented, and the performance of the ONC is evaluated for simple Boolean tasks, species classification of an Iris dataset, classifying nonlinear datasets (Circle and Spiral), and handwriting recognition.
Journal ArticleDOI
Photonic matrix multiplication lights up photonic accelerator and beyond
Hailong Zhou,Jianji Dong,Junwei Cheng,Wenchan Dong,Chaoran Huang,Yichen Shen,Qiming Zhang,Min Gu,Chao Qian,Hongsheng Chen,Zhichao Ruan,Xinliang Zhang +11 more
TL;DR: In this article , a review of photonic matrix multiplication methods is presented, mainly including the plane light conversion method, Mach-Zehnder interferometer method and wavelength division multiplexing method.
Journal ArticleDOI
Reconfigurable all-optical nonlinear activation functions for neuromorphic photonics.
TL;DR: The device is programmable to generate various nonlinear activation functions, including sigmoid, radial-basis, clamped rectified linear unit, and softplus, with tunable thresholds, and can be flexibly programmed to optimize the performance of different neuromorphic tasks.
References
More filters
Journal ArticleDOI
Long short-term memory
TL;DR: A novel, efficient, gradient based method called long short-term memory (LSTM) is introduced, which can learn to bridge minimal time lags in excess of 1000 discrete-time steps by enforcing constant error flow through constant error carousels within special units.
Journal ArticleDOI
Ror2 signaling regulates Golgi structure and transport through IFT20 for tumor invasiveness
Michiru Nishita,Seung-Yeol Park,Tadashi Nishio,Koki Kamizaki,ZhiChao Wang,Kota Tamada,Toru Takumi,Ryuju Hashimoto,Hiroki Otani,Gregory J. Pazour,Victor W. Hsu,Yasuhiro Minami +11 more
TL;DR: It is found that intraflagellar transport 20 mediates the ability of Ror2 signaling to induce the invasiveness of tumors that lack primary cilia, and IFT20 regulates the nucleation of Golgi-derived microtubules by affecting the GM130-AKAP450 complex.
Posted Content
Delving Deep into Rectifiers: Surpassing Human-Level Performance on ImageNet Classification
TL;DR: This work proposes a Parametric Rectified Linear Unit (PReLU) that generalizes the traditional rectified unit and derives a robust initialization method that particularly considers the rectifier nonlinearities.
Journal ArticleDOI
Ultrastructural Characterization of the Lower Motor System in a Mouse Model of Krabbe Disease.
Valentina Cappello,Laura Marchetti,Paola Parlanti,Paola Parlanti,Silvia Landi,Ilaria Tonazzini,Marco Cecchini,Vincenzo Piazza,Mauro Gemmi +8 more
TL;DR: The data further characterize the ultrastructural analysis of the KD mouse model, and support recent theories of a dying-back mechanism for neuronal degeneration, which is independent of demyelination.
Journal ArticleDOI
In situ immune response and mechanisms of cell damage in central nervous system of fatal cases microcephaly by Zika virus
Raimunda do Socorro da Silva Azevedo,Jorge Rodrigues de Sousa,Marialva Tereza Ferreira de Araújo,Arnaldo Jorge Martins Filho,Bianca Nascimento de Alcantara,Fernanda Montenegro de Carvalho Araújo,Maria G. L. Queiroz,Ana Cecília Ribeiro Cruz,Beatriz H. Baldez Vasconcelos,Jannifer Oliveira Chiang,Lívia Carício Martins,Livia Medeiros Neves Casseb,Eliana Vieira Pinto da Silva,Valéria Lima Carvalho,Barbara Cristina Baldez Vasconcelos,Sueli Rodrigues,Consuelo Silva de Oliveira,Juarez Antônio Simões Quaresma,Pedro Fernando da Costa Vasconcelos +18 more
TL;DR: The in situ immune response profile and mechanisms of neuronal cell damage in fatal Zika microcephaly cases were investigated and changes found were mainly calcification, necrosis, neuronophagy, gliosis, microglial nodules, and inflammatory infiltration of mononuclear cells.