OPTICAL LEARNING NEURAL-NETWORK WITH A POCKELS READOUT OPTICAL MODULATOR

Citation
M. Mori et al., OPTICAL LEARNING NEURAL-NETWORK WITH A POCKELS READOUT OPTICAL MODULATOR, Applied optics, 37(14), 1998, pp. 2852-2857
Citations number
20
Categorie Soggetti
Optics
Journal title
Volume
37
Issue
14
Year of publication
1998
Pages
2852 - 2857
Database
ISI
SICI code
Abstract
We have constructed an optical neural-network system with learning cap ability by using a Pockels readout optical modulator. The system has a two-dimensional structure that permits easy optical alignment and can handle images without scanning. Learning signals are calculated optic ally with two Liquid-crystal devices by a matrix-matrix outer-product method. The calculated learning signals are added directly to the weig hts memorized on the Pockels readout optical modulator. A two-layer ne twork is implemented, and the learning and recognition of four alphabe tical characters are realized according to the delta rule. (C) 1998 Op tical Society of America.