Abstract

An associative memory based on a model by Rizvi and Zubairy [Appl. Opt. 33, 3642 (1994) ] is experimentally demonstrated. The parallel optical interconnection is realized compactly by computer-generated holograms. A novel scheme of real-time thresholding is proposed and is proved to be effective and simple to implement. Stored images are successfully retrieved with both complete and partial inputs.

© 2005 Optical Society of America

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References

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2004 (1)

2002 (1)

A. A. S. Awwal, H. Tang, K. S. Gudmundsson, and J. Khan, Proc. SPIE 4788, 159 (2002).
[CrossRef]

2000 (1)

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

1997 (1)

1994 (1)

1991 (3)

1989 (1)

A. A. S. Awwal, M. A. Karim, and H.-K. Liu, Opt. Eng. 28, 537 (1989).
[CrossRef]

1986 (1)

H.-K. Liu, S. Y. Kung, and J. A. Davis, Opt. Eng. 25, 853 (1986).

1985 (1)

1982 (1)

J. J. Hopfield, Proc. Natl. Acad. Sci. U.S.A. 79, 2552 (1982).
[CrossRef]

1967 (1)

1966 (1)

Awwal, A. A. S.

A. A. S. Awwal, H. Tang, K. S. Gudmundsson, and J. Khan, Proc. SPIE 4788, 159 (2002).
[CrossRef]

A. A. S. Awwal, M. A. Karim, and H.-K. Liu, Opt. Eng. 28, 537 (1989).
[CrossRef]

Bartelt, H.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Brown, B. R.

Davis, J. A.

H.-K. Liu, S. Y. Kung, and J. A. Davis, Opt. Eng. 25, 853 (1986).

Erhard, W.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Farhat, N.

Feng, Z.

Fey, D.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Gao, S.

Goodman, J. W.

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1968).

Grimm, G.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Gruber, M.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Gudmundsson, K. S.

A. A. S. Awwal, H. Tang, K. S. Gudmundsson, and J. Khan, Proc. SPIE 4788, 159 (2002).
[CrossRef]

Hopfield, J. J.

J. J. Hopfield, Proc. Natl. Acad. Sci. U.S.A. 79, 2552 (1982).
[CrossRef]

Hoppe, L.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Jahns, J.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Karim, M. A.

A. A. S. Awwal, M. A. Karim, and H.-K. Liu, Opt. Eng. 28, 537 (1989).
[CrossRef]

Khan, J.

A. A. S. Awwal, H. Tang, K. S. Gudmundsson, and J. Khan, Proc. SPIE 4788, 159 (2002).
[CrossRef]

Kung, S. Y.

H.-K. Liu, S. Y. Kung, and J. A. Davis, Opt. Eng. 25, 853 (1986).

Lee, S. S.

Liu, H.-K.

A. A. S. Awwal, M. A. Karim, and H.-K. Liu, Opt. Eng. 28, 537 (1989).
[CrossRef]

H.-K. Liu, S. Y. Kung, and J. A. Davis, Opt. Eng. 25, 853 (1986).

Lo, R. C.

Lohmann, A. W.

Lu, T.

Mu, G.

Paris, D. P.

Park, S.-C.

Psaltis, D.

Rizvi, A. A.

Shi, C. Y.

Sinzinger, S.

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Song, S. H.

Tang, H.

A. A. S. Awwal, H. Tang, K. S. Gudmundsson, and J. Khan, Proc. SPIE 4788, 159 (2002).
[CrossRef]

Wang, X.

Yang, J.

Yang, X.

Yeh, S. L.

Yu, F. T. S.

Zhang, Y.

Zubairy, M. S.

Appl. Opt. (5)

Opt. Eng. (2)

H.-K. Liu, S. Y. Kung, and J. A. Davis, Opt. Eng. 25, 853 (1986).

A. A. S. Awwal, M. A. Karim, and H.-K. Liu, Opt. Eng. 28, 537 (1989).
[CrossRef]

Opt. Lett. (4)

Proc. IEEE (1)

D. Fey, W. Erhard, M. Gruber, J. Jahns, H. Bartelt, G. Grimm, L. Hoppe, and S. Sinzinger, Proc. IEEE 88, 838 (2000).
[CrossRef]

Proc. Natl. Acad. Sci. U.S.A. (1)

J. J. Hopfield, Proc. Natl. Acad. Sci. U.S.A. 79, 2552 (1982).
[CrossRef]

Proc. SPIE (1)

A. A. S. Awwal, H. Tang, K. S. Gudmundsson, and J. Khan, Proc. SPIE 4788, 159 (2002).
[CrossRef]

Other (1)

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, 1968).

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Figures (3)

Fig. 1
Fig. 1

(a) Schematic of the experimental setup: YAG, collimated Nd:YAG laser, frequency doubled to 532 nm ; IM, input mask; BS, beam splitters; MM, memory mask; FL, Fourier-transform lens with focal length 75 cm ; ND0–N2, neutral-density filters; M, mirrors; L, convex lens; T, telescope; CCD1, CCD2, cameras; PC, personal computer. (b) Images of numbers from 0 to 9 stored in the memory mask.

Fig. 2
Fig. 2

Images of, left to right, (a) input masks captured by CCD1, (b) intermediate neuron intensities detected by CCD2, (c) fast-Fourier-transform simulation of the intermediate neuron intensities, (d) the binarized outputs.

Fig. 3
Fig. 3

Images of (a) the partial input for “9,” (b) intermediate neuron intensity, and (c) binarized output.

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