Abstract

A GaAs/AlGaAs optical synaptic interconnection device for neural networks is reported for the first time to our knowledge. This device consists of a light-emitting-diode array, an interconnection matrix, and a photodiode array, which are integrated into a hybrid-layered structure on a GaAs substrate. The device structure and characteristics are reported in detail. The fabricated device can simulate a 32-neuron system. Experimental results of the Hopfield associative memory with three stored vectors are also described.

© 1989 Optical Society of America

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References

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  1. For example, D. E. Rumelhart, J. L. McClellandthe PDP Research Group, Parallel Distributed Processing (MIT Press, Cambridge, Mass., 1986), Vols. I and II.
  2. W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
    [CrossRef]
  3. A. P. Thakoor, A. Moopenn, J. Lambe, S. K. Khanna, Appl. Opt. 26, 5085 (1987).
    [CrossRef] [PubMed]
  4. N. H. Farhat, D. Psaltis, A. Prata, E. Paek, Appl. Opt. 24, 1469 (1985).
    [CrossRef] [PubMed]
  5. A. D. Fisher, W. L. Lippincott, J. N. Lee, Appl. Opt. 26, 5039 (1987).
    [CrossRef] [PubMed]
  6. N. H. Farhat, Appl. Opt. 26, 5093 (1987).
    [CrossRef] [PubMed]
  7. J. J. Hopfield, Proc. Natl. Acad. Sci. USA 79, 2554 (1982).
    [CrossRef] [PubMed]
  8. K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

1988

K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

1987

1986

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

1985

1982

J. J. Hopfield, Proc. Natl. Acad. Sci. USA 79, 2554 (1982).
[CrossRef] [PubMed]

Denker, J.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Farhat, N. H.

Fisher, A. D.

Graf, H. P.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Hopfield, J. J.

J. J. Hopfield, Proc. Natl. Acad. Sci. USA 79, 2554 (1982).
[CrossRef] [PubMed]

Howard, R.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Hubbard, W.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Jackel, L.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Khanna, S. K.

Kojima, K.

K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

Kyuma, K.

K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

Lambe, J.

Lee, J. N.

Lippincott, W. L.

McClelland, J. L.

For example, D. E. Rumelhart, J. L. McClellandthe PDP Research Group, Parallel Distributed Processing (MIT Press, Cambridge, Mass., 1986), Vols. I and II.

Moopenn, A.

Nakayama, T.

K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

Ohta, J.

K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

Paek, E.

Prata, A.

Psaltis, D.

Rumelhart, D. E.

For example, D. E. Rumelhart, J. L. McClellandthe PDP Research Group, Parallel Distributed Processing (MIT Press, Cambridge, Mass., 1986), Vols. I and II.

Schwartz, D.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Straughn, B.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Tennant, D.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Thakoor, A. P.

AIP Conf. Proc.

W. Hubbard, D. Schwartz, J. Denker, H. P. Graf, R. Howard, L. Jackel, B. Straughn, D. Tennant, AIP Conf. Proc. 151, 227 (1986).
[CrossRef]

Appl. Opt.

Proc. Natl. Acad. Sci. USA

J. J. Hopfield, Proc. Natl. Acad. Sci. USA 79, 2554 (1982).
[CrossRef] [PubMed]

Proc. Soc. Photo-Opt. Instrum. Eng.

K. Kyuma, J. Ohta, K. Kojima, T. Nakayama, Proc. Soc. Photo-Opt. Instrum. Eng. 963, 475 (1988).

Other

For example, D. E. Rumelhart, J. L. McClellandthe PDP Research Group, Parallel Distributed Processing (MIT Press, Cambridge, Mass., 1986), Vols. I and II.

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Figures (3)

Fig. 1
Fig. 1

Illustration of the GaAs/AlGaAs optical synaptic chip.

Fig. 2
Fig. 2

Emission pattern of the LED array through the interconnection matrix Tij(−). The white solid line indicates the position of the 26th PD. The power distribution there and the corresponding elements are depicted at the bottom of the figure.

Fig. 3
Fig. 3

Recognition rate as a function of the Hamming distance. The inset shows stored patterns of A, J, and E.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

u i = j = 1 N T ij v j ,
T ij = { m = 1 3 [ 2 v i ( m ) 1 ] [ 2 v j ( m ) 1 ] } 3 δ ij ,
v i = 1 ( u i θ i ) ,

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