Abstract

It has been demonstrated [see, e.g., W.R. Babbitt and T. W. Mossberg, Opt. Commun. 65, 185 (1988)] that coherent optical processes can be employed to store and reproduce temporal sequences of optical data, thereby providing a mechanism for advanced optical memories. We find that excitation pulse phase noise can be used to extend the range of experimental conditions under which the storage process is effective and discuss the use of phase noise to achieve secure data storage.

© 1991 Optical Society of America

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References

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  1. A. Szabo, U.S. patent3,896,420 (July22, 1975); W. E. Moerner, J. Mol. Electron. 1, 55 (1985); W. E. Moerner, ed., Persistent Spectral Holeburning: Science and Applications, Vol. 44 of Topics in Current Physics (Springer-Verlag, Berlin, 1988).
    [Crossref]
  2. T. W. Mossberg, Opt. Lett. 7, 77 (1982).
    [Crossref] [PubMed]
  3. Y. S. Bai, W. R. Babbitt, T. W. Mossberg, Opt. Lett. 11, 724 (1986).
    [Crossref] [PubMed]
  4. W. R. Babbitt, T. W. Mossberg, Opt. Commun. 65, 185 (1988).
    [Crossref]
  5. M. K. Kim, R. Kachru, Opt. Lett. 14, 423 (1989).
    [Crossref] [PubMed]
  6. M. Mitsunaga, N. Uesugi, Opt. Lett. 15, 195 (1990).
    [Crossref] [PubMed]
  7. R. M. Macfarlane, R. M. Shelby, Opt. Commun. 39, 169 (1981); J. Huang, J. M. Zhang, T. W. Mossberg, Opt. Commun. 75, 29 (1990).
    [Crossref]

1990 (1)

1989 (1)

1988 (1)

W. R. Babbitt, T. W. Mossberg, Opt. Commun. 65, 185 (1988).
[Crossref]

1986 (1)

1982 (1)

1981 (1)

R. M. Macfarlane, R. M. Shelby, Opt. Commun. 39, 169 (1981); J. Huang, J. M. Zhang, T. W. Mossberg, Opt. Commun. 75, 29 (1990).
[Crossref]

Babbitt, W. R.

Bai, Y. S.

Kachru, R.

Kim, M. K.

Macfarlane, R. M.

R. M. Macfarlane, R. M. Shelby, Opt. Commun. 39, 169 (1981); J. Huang, J. M. Zhang, T. W. Mossberg, Opt. Commun. 75, 29 (1990).
[Crossref]

Mitsunaga, M.

Mossberg, T. W.

Shelby, R. M.

R. M. Macfarlane, R. M. Shelby, Opt. Commun. 39, 169 (1981); J. Huang, J. M. Zhang, T. W. Mossberg, Opt. Commun. 75, 29 (1990).
[Crossref]

Szabo, A.

A. Szabo, U.S. patent3,896,420 (July22, 1975); W. E. Moerner, J. Mol. Electron. 1, 55 (1985); W. E. Moerner, ed., Persistent Spectral Holeburning: Science and Applications, Vol. 44 of Topics in Current Physics (Springer-Verlag, Berlin, 1988).
[Crossref]

Uesugi, N.

Opt. Commun. (2)

W. R. Babbitt, T. W. Mossberg, Opt. Commun. 65, 185 (1988).
[Crossref]

R. M. Macfarlane, R. M. Shelby, Opt. Commun. 39, 169 (1981); J. Huang, J. M. Zhang, T. W. Mossberg, Opt. Commun. 75, 29 (1990).
[Crossref]

Opt. Lett. (4)

Other (1)

A. Szabo, U.S. patent3,896,420 (July22, 1975); W. E. Moerner, J. Mol. Electron. 1, 55 (1985); W. E. Moerner, ed., Persistent Spectral Holeburning: Science and Applications, Vol. 44 of Topics in Current Physics (Springer-Verlag, Berlin, 1988).
[Crossref]

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Figures (4)

Fig. 1
Fig. 1

Normalized electric-field cross correlation, χwr(τ), of the identical phase-modulated write and read pulses employed in the present experiments. The phase is switched 300 times in a statistically independent manner between the values of zero and π. The width of the peak is approximately equal to the interval between phase shifts, which in this case is T/300, where T is the duration of the pulse envelope. The cross correlation was numerically evaluated from the measured-phase modulation pattern.

Fig. 2
Fig. 2

Experimental setup. BC, beam combiner; PMT, photomultiplier tube; AMP, amplifier; RF Osc., rf oscillator.

Fig. 3
Fig. 3

Demonstration of faithful pulse-shape reproduction using write and read pulses with identical pseudorandom phase modulation. (a) Measured intensity profiles of the write, read, and data pulses along with the output signal produced. (b) Simulation of the experimental results using the measured pulse parameters and expression (1).

Fig. 4
Fig. 4

(a) Output signal generated in the case of write and read pulses with nonidentical pseudorandom phase modulation. (b) Simulations of the experimental results using the measured pulse parameters and expression (1).

Equations (7)

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E sig ( t ) - + χ wr ( τ ) E d ( t - τ ) d τ ,
χ wr ( τ ) = - + E r ( t ) E w ( t + τ ) d t ,
χ wr 0 χ wr ( 0 ) E 0 2 T b M
χ wr rms ( τ ) = E 0 2 T b M ,
S A 0 E 0 2 T b 2 M .
B A 0 E 0 2 T b 2 ( M T d T b ) 1 / 2 .
( S B ) 2 T T d .

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