Abstract

A time-integrating correlator based on techniques of fiber-optic delay-line signal processing is described. We show that the time-integrating architecture does not suffer from limitations associated with previously demonstrated space-integrating fiber-optic correlators. Experimental results from an eight-channel time-integrating correlator are presented, demonstrating real-time autocorrelation of a 5-MHz square wave. Limitations of the experimental correlator are discussed, and an alternative design is proposed, with a potential time–bandwidth product of the order of 108.

© 1994 Optical Society of America

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References

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  1. K. Wilner, A. P. van den Heuvel, Proc. IEEE 64, 805 (1976).
    [CrossRef]
  2. C. T. Chang, J. A. Cassaboom, H. F. Taylor, Electron. Lett. 13, 678 (1977).
    [CrossRef]
  3. R. L. Ohlhaber, K. Wilner, Electro-Opt. Syst. Des. 9, 33 (1977).
  4. K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
    [CrossRef]
  5. K. P. Jackson, H. J. Shaw, in Optical Signal Processing, J. L. Horner, ed. (Academic, San Diego, Calif., 1987), Chap. 7.1.
  6. R. A. Sprague, C. L. Koliopoulos, Appl. Opt. 15, 89 (1976).
    [CrossRef] [PubMed]
  7. R. A. Athale, G. W. Euliss, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS69.
  8. G. W. Euliss, R. A. Athale, in Annual Meeting, Vol. 16 of 1993 Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper ThI6.

1985 (1)

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

1977 (2)

C. T. Chang, J. A. Cassaboom, H. F. Taylor, Electron. Lett. 13, 678 (1977).
[CrossRef]

R. L. Ohlhaber, K. Wilner, Electro-Opt. Syst. Des. 9, 33 (1977).

1976 (2)

R. A. Sprague, C. L. Koliopoulos, Appl. Opt. 15, 89 (1976).
[CrossRef] [PubMed]

K. Wilner, A. P. van den Heuvel, Proc. IEEE 64, 805 (1976).
[CrossRef]

Athale, R. A.

R. A. Athale, G. W. Euliss, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS69.

G. W. Euliss, R. A. Athale, in Annual Meeting, Vol. 16 of 1993 Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper ThI6.

Cassaboom, J. A.

C. T. Chang, J. A. Cassaboom, H. F. Taylor, Electron. Lett. 13, 678 (1977).
[CrossRef]

Chang, C. T.

C. T. Chang, J. A. Cassaboom, H. F. Taylor, Electron. Lett. 13, 678 (1977).
[CrossRef]

Cutler, C. C.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

Euliss, G. W.

R. A. Athale, G. W. Euliss, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS69.

G. W. Euliss, R. A. Athale, in Annual Meeting, Vol. 16 of 1993 Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper ThI6.

Goodman, J. W.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

Jackson, K. P.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

K. P. Jackson, H. J. Shaw, in Optical Signal Processing, J. L. Horner, ed. (Academic, San Diego, Calif., 1987), Chap. 7.1.

Koliopoulos, C. L.

Moslehi, B.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

Newton, S. A.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

Ohlhaber, R. L.

R. L. Ohlhaber, K. Wilner, Electro-Opt. Syst. Des. 9, 33 (1977).

Shaw, H. J.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

K. P. Jackson, H. J. Shaw, in Optical Signal Processing, J. L. Horner, ed. (Academic, San Diego, Calif., 1987), Chap. 7.1.

Sprague, R. A.

Taylor, H. F.

C. T. Chang, J. A. Cassaboom, H. F. Taylor, Electron. Lett. 13, 678 (1977).
[CrossRef]

Tur, M.

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

van den Heuvel, A. P.

K. Wilner, A. P. van den Heuvel, Proc. IEEE 64, 805 (1976).
[CrossRef]

Wilner, K.

R. L. Ohlhaber, K. Wilner, Electro-Opt. Syst. Des. 9, 33 (1977).

K. Wilner, A. P. van den Heuvel, Proc. IEEE 64, 805 (1976).
[CrossRef]

Appl. Opt. (1)

Electro-Opt. Syst. Des. (1)

R. L. Ohlhaber, K. Wilner, Electro-Opt. Syst. Des. 9, 33 (1977).

Electron. Lett. (1)

C. T. Chang, J. A. Cassaboom, H. F. Taylor, Electron. Lett. 13, 678 (1977).
[CrossRef]

IEEE Trans. Microwave Theory Tech. (1)

K. P. Jackson, S. A. Newton, B. Moslehi, M. Tur, C. C. Cutler, J. W. Goodman, H. J. Shaw, IEEE Trans. Microwave Theory Tech. MTT-33, 193 (1985).
[CrossRef]

Proc. IEEE (1)

K. Wilner, A. P. van den Heuvel, Proc. IEEE 64, 805 (1976).
[CrossRef]

Other (3)

K. P. Jackson, H. J. Shaw, in Optical Signal Processing, J. L. Horner, ed. (Academic, San Diego, Calif., 1987), Chap. 7.1.

R. A. Athale, G. W. Euliss, in Conference on Lasers and Electro-Optics, Vol. 11 of 1993 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper CThS69.

G. W. Euliss, R. A. Athale, in Annual Meeting, Vol. 16 of 1993 Technical Digest Series (Optical Society of America, Washington, D.C., 1993), paper ThI6.

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Figures (4)

Fig. 1
Fig. 1

Schematic of a four-channel time-integrating fiber-optic delay-line correlator that uses an optical point modulator to encode the reference signal r(t).

Fig. 2
Fig. 2

Schematic of a four-channel time-integrating fiber-optic delay-line correlator that uses four guided-wave modulators to encode the reference signal r(t).

Fig. 3
Fig. 3

Top and side views of the experimental configuration.

Fig. 4
Fig. 4

Real-time autocorrelation of a 5-MHz square wave. The solid curve corresponds to experimental results, and the points correspond to values computed from Eq. (3) for a rectangular window function 70 ns wide and T0 = 109 ns.

Equations (3)

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v ( τ n ) = α 0 t d s ( t - τ n ) r ( t ) d t ,
v ( τ n ) = α 0 t d s ( t - τ n ) s ( t ) d t .
v ( τ n ) = α 0 t d s ( t - τ n ) [ W ( x / v a ) * r ( t ) ] d t ,

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