Abstract

We propose a new optical implementation of orthogonal phase-code multiplexing in which an arbitrary phase shift of θ or θ+π is used in the reference beam instead of 0 or π as in the conventional method. To compare the new and the conventional methods, we employ a 2-bit orthogonal phase code and store two binary-data images in a BaTiO3 crystal with each method. We also employ numerical methods to simulate the 2-bit phase-code multiplexing and show that the signal-to-noise ratio in the restored images is improved by more than one order of magnitude in the new method in our experimental conditions.

© 2001 Optical Society of America

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References

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  1. F. M. Mok, Opt. Lett. 18, 915 (1993).
    [CrossRef]
  2. C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
    [CrossRef]
  3. J. Trisnadi and S. Redfield, Proc. SPIE 1773, 362 (1992).
    [CrossRef]
  4. C. Alves, G. Pauliat, and G. Roosen, Opt. Lett. 19, 1894 (1994).
    [CrossRef]
  5. G. A. Rakuljic, V. Leyva, and A. Yariv, Opt. Lett. 17, 1471 (1992).
    [CrossRef]
  6. N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
    [CrossRef]

1994 (1)

1993 (1)

1992 (2)

G. A. Rakuljic, V. Leyva, and A. Yariv, Opt. Lett. 17, 1471 (1992).
[CrossRef]

J. Trisnadi and S. Redfield, Proc. SPIE 1773, 362 (1992).
[CrossRef]

1991 (1)

C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
[CrossRef]

1979 (1)

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Alves, C.

Denz, C.

C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
[CrossRef]

Kukhtarev, N. V.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Leyva, V.

Markov, V. B.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Mok, F. M.

Odulov, S. G.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Pauliat, G.

C. Alves, G. Pauliat, and G. Roosen, Opt. Lett. 19, 1894 (1994).
[CrossRef]

C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
[CrossRef]

Rakuljic, G. A.

Redfield, S.

J. Trisnadi and S. Redfield, Proc. SPIE 1773, 362 (1992).
[CrossRef]

Roosen, G.

C. Alves, G. Pauliat, and G. Roosen, Opt. Lett. 19, 1894 (1994).
[CrossRef]

C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
[CrossRef]

Soskin, M. S.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Trisnadi, J.

J. Trisnadi and S. Redfield, Proc. SPIE 1773, 362 (1992).
[CrossRef]

Tschudi, T.

C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
[CrossRef]

Vinetskii, V. L.

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Yariv, A.

Ferroelectrics (1)

N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, Ferroelectrics 22, 949 (1979).
[CrossRef]

Opt. Commun. (1)

C. Denz, G. Pauliat, G. Roosen, and T. Tschudi, Opt. Commun. 85, 171 (1991).
[CrossRef]

Opt. Lett. (3)

Proc. SPIE (1)

J. Trisnadi and S. Redfield, Proc. SPIE 1773, 362 (1992).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Experimental setup: Ms, mirrors; BS1–BS4, beam splitters; L1–L5, lenses; S1, S2, mechanical shutters. C, c axis of the crystal.

Fig. 2
Fig. 2

Two restored images in (a), (b) the conventional method and (c), (d) the new method.

Fig. 3
Fig. 3

Monitored diffraction efficiencies for (a) offon and (b) onoff recordings.

Fig. 4
Fig. 4

Signal-to-noise ratio of (a) offon recording and (b) onoff recording.

Tables (1)

Tables Icon

Table 1 Optical Implementation of 8-bit Walsh–Hadamard Codea

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