Abstract

We present experimental results demonstrating the use of stimulated echoes for high-speed pattern recognition. One data image and two reference images (spatially encoded laser pulses) were stored and processed in a Pr3+:LaF3 crystal by focusing the pulses sequentially into the storage material. The processed information was later retrieved by a read pulse, generating two temporally separated echo images that are the spatial correlations between the data and reference images. Identification of the data image was accomplished by finding the echo image that showed the highest spatial correlation with the data image. The present processing speed is 30 ns per correlation operation.

© 1992 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. N. W. Carlson, W. R. Babbitt, T. W. Mossberg, Opt. Lett. 8, 623 (1983).
    [CrossRef] [PubMed]
  2. M. K. Kim, R. Kachru, J. Opt. Soc. Am. B 4, 305 (1987).
    [CrossRef]
  3. M. K. Kim, R. Kachru, Opt. Lett. 12, 593 (1987).
    [CrossRef] [PubMed]
  4. E. Y. Xu, S. Kröll, D. L. Huestis, R. Kachru, M. K. Kim, Opt. Lett. 15, 562 (1990).
    [CrossRef] [PubMed]
  5. A. B. Van der Lugt, IEEE Trans. Inf. Theory IT-10, 2 (1964).
  6. E. G. Paek, D. Psaltis, Opt. Eng. 26, 428 (1987).
  7. D. M. Pepper, J. AulYeung, D. Fekete, A. Yariv, Opt. Lett. 3, 7 (1978).
    [CrossRef] [PubMed]
  8. J. O. White, A. Yariv, Appl. Phys. Lett. 1, 37 (1980).
  9. S. G. Odulov, M. S. Soskin, Sov. Phys. Dokl. 25, 5 (1980).
  10. T. W. Mossberg, R. Kachru, S. R. Hartman, A. M. Flusberg, Phys. Rev. A 20, 1976 (1979).
    [CrossRef]
  11. M. K. Kim, R. Kachru, Opt. Lett. 14, 423 (1989).
    [CrossRef] [PubMed]
  12. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, New York, 1968).
  13. S. Kröll, L. E. Jusinski, R. Kachru, Opt. Lett. 16, 517 (1991).
    [CrossRef] [PubMed]

1991 (1)

1990 (1)

1989 (1)

1987 (3)

1983 (1)

1980 (2)

J. O. White, A. Yariv, Appl. Phys. Lett. 1, 37 (1980).

S. G. Odulov, M. S. Soskin, Sov. Phys. Dokl. 25, 5 (1980).

1979 (1)

T. W. Mossberg, R. Kachru, S. R. Hartman, A. M. Flusberg, Phys. Rev. A 20, 1976 (1979).
[CrossRef]

1978 (1)

1964 (1)

A. B. Van der Lugt, IEEE Trans. Inf. Theory IT-10, 2 (1964).

AulYeung, J.

Babbitt, W. R.

Carlson, N. W.

Fekete, D.

Flusberg, A. M.

T. W. Mossberg, R. Kachru, S. R. Hartman, A. M. Flusberg, Phys. Rev. A 20, 1976 (1979).
[CrossRef]

Goodman, J. W.

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

Hartman, S. R.

T. W. Mossberg, R. Kachru, S. R. Hartman, A. M. Flusberg, Phys. Rev. A 20, 1976 (1979).
[CrossRef]

Huestis, D. L.

Jusinski, L. E.

Kachru, R.

Kim, M. K.

Kröll, S.

Mossberg, T. W.

N. W. Carlson, W. R. Babbitt, T. W. Mossberg, Opt. Lett. 8, 623 (1983).
[CrossRef] [PubMed]

T. W. Mossberg, R. Kachru, S. R. Hartman, A. M. Flusberg, Phys. Rev. A 20, 1976 (1979).
[CrossRef]

Odulov, S. G.

S. G. Odulov, M. S. Soskin, Sov. Phys. Dokl. 25, 5 (1980).

Paek, E. G.

E. G. Paek, D. Psaltis, Opt. Eng. 26, 428 (1987).

Pepper, D. M.

Psaltis, D.

E. G. Paek, D. Psaltis, Opt. Eng. 26, 428 (1987).

Soskin, M. S.

S. G. Odulov, M. S. Soskin, Sov. Phys. Dokl. 25, 5 (1980).

Van der Lugt, A. B.

A. B. Van der Lugt, IEEE Trans. Inf. Theory IT-10, 2 (1964).

White, J. O.

J. O. White, A. Yariv, Appl. Phys. Lett. 1, 37 (1980).

Xu, E. Y.

Yariv, A.

Appl. Phys. Lett. (1)

J. O. White, A. Yariv, Appl. Phys. Lett. 1, 37 (1980).

IEEE Trans. Inf. Theory (1)

A. B. Van der Lugt, IEEE Trans. Inf. Theory IT-10, 2 (1964).

J. Opt. Soc. Am. B (1)

Opt. Eng. (1)

E. G. Paek, D. Psaltis, Opt. Eng. 26, 428 (1987).

Opt. Lett. (6)

Phys. Rev. A (1)

T. W. Mossberg, R. Kachru, S. R. Hartman, A. M. Flusberg, Phys. Rev. A 20, 1976 (1979).
[CrossRef]

Sov. Phys. Dokl. (1)

S. G. Odulov, M. S. Soskin, Sov. Phys. Dokl. 25, 5 (1980).

Other (1)

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

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (3)

Fig. 1
Fig. 1

Schematic of the experimental setup for high-speed pattern recognition. The temporal sequence of the input and echo pulses is also shown. DL, dye laser; SF, spatial filter; M’s mirrors; BS’s, beam splitters; OD’s, optical delays; BE’s, beam expanders; BC, beam combiner; ICCD, intensified CCD camera.

Fig. 2
Fig. 2

(a), (b) Photographs showing two successive operations of a two-image correlation. The two echo images (e and e′) were separated by 30 ns and recorded individually by the gated intensified CCD camera. The last photograph in (b) shows the simultaneous recording of the two echo images.

Fig. 3
Fig. 3

Photographs demonstrating nanosecond pattern recognition. Pulse 1 is the data image to be analyzed, and pulses 2 and 2′ are the reference images. (a) Correlations of the reference images with a data image consisting of two O’s and two X’s. (b) After the right side of the data image in (a) is blocked. (c) After the left side of the data image in (a) is blocked. (d) After the data image in (a) is rotated by 90°.

Equations (2)

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

P u 1 * u 2 u 3 exp [ i ( - k 1 + k 2 + k 3 ) r ] ,
E e ( x , y ) u 1 ( - x , - y ) u 2 ( - x , - y ) u 3 ( - x , - y ) ,

Metrics