Optical neurochip with learning capability

Author

Nitta, Y. ; Ohta, J. ; Takahashi, M. ; Tai, S. ; Kyuma, K.

Author_Institution

Mitsubishi Electr. Corp., Hyogo, Japan

Volume

4

Issue

3

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

247

Lastpage

249

Abstract

A dynamic optical neurochip with variable synaptic interconnection capability has been reported. A novel type of photodetector called a variable sensitivity photodetector has been developed for the synaptic interconnection of neural networks. It utilizes a metal-semiconductor-metal structure whose quantum efficiency can be modulated by an applied bias voltage. The fabricated dynamic optical neurochip consists of an 8*8 variable sensitivity photodetector (VSPD) array and an 8 line-shaped LED array. It is shown that this device is suitable for learning in neural networks. The application to pattern classification is demonstrated.<>

Keywords

electro-optical devices; integrated optoelectronics; learning systems; light emitting diodes; metal-semiconductor-metal structures; neural nets; optical interconnections; pattern recognition; photodetectors; sensitivity; applied bias voltage; dynamic optical neurochip; learning capability; line-shaped LED array; metal-semiconductor-metal structure; neural networks; pattern classification; quantum efficiency; variable sensitivity photodetector; variable synaptic interconnection capability; Light emitting diodes; Neural networks; Optical arrays; Optical computing; Optical interconnections; Optical modulation; Optical sensors; Pattern classification; Photodetectors; Voltage;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.122381

Filename

122381