Abstract

We show an accurate procedure to obtain a Fourier transform (FT) with no dc term using a commercial twisted-nematic liquid-crystal display. We focus on the application to holographic storage of binary data pages, where a drastic decrease of the dc term in the FT is highly desirable. Two different codification schemes are considered: binary π radians phase modulation and hybrid ternary modulation. Any deviation in the values of the amplitude and phase shift generates the appearance of a strong dc term. Experimental results confirm that the calculated configurations provide a FT with no dc term, thus showing the effectiveness of the proposal.

© 2007 Optical Society of America

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References

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  2. H.J.Coufal, D.Psaltis, and B.T.Sincerbox, eds., Holographic Data Storage (Springer-Verlag, 2000).
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    [CrossRef] [PubMed]
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    [CrossRef]
  9. A. Márquez, J. Campos, M. J. Yzuel, I. Moreno, J. A. Davis, C. Iemmi, A. Moreno, and A. Robert, Opt. Eng. 39, 3301 (2000).
    [CrossRef]
  10. A. Márquez, I. Moreno, C. Iemmi, J. Campos, and M. J. Yzuel, Opt. Eng. (to be published).

2006 (1)

2005 (1)

R. John, J. Joseph, and K. Singh, Opt. Lasers Eng. 43, 183 (2005).
[CrossRef]

2003 (1)

2001 (2)

J.-S. Jang and D.-H. Shin, Opt. Lett. 26, 1797 (2001).
[CrossRef]

A. Márquez, C. Iemmi, I. Moreno, J. A. Davis, J. Campos, and M. J. Yzuel, Opt. Eng. 40, 2558 (2001).
[CrossRef]

2000 (1)

A. Márquez, J. Campos, M. J. Yzuel, I. Moreno, J. A. Davis, C. Iemmi, A. Moreno, and A. Robert, Opt. Eng. 39, 3301 (2000).
[CrossRef]

Appl. Opt. (2)

Opt. Eng. (2)

A. Márquez, C. Iemmi, I. Moreno, J. A. Davis, J. Campos, and M. J. Yzuel, Opt. Eng. 40, 2558 (2001).
[CrossRef]

Opt. Eng. (1)

A. Márquez, J. Campos, M. J. Yzuel, I. Moreno, J. A. Davis, C. Iemmi, A. Moreno, and A. Robert, Opt. Eng. 39, 3301 (2000).
[CrossRef]

Opt. Eng. (2)

A. Márquez, I. Moreno, C. Iemmi, J. Campos, and M. J. Yzuel, Opt. Eng. (to be published).

Opt. Lasers Eng. (1)

R. John, J. Joseph, and K. Singh, Opt. Lasers Eng. 43, 183 (2005).
[CrossRef]

Opt. Lett. (1)

Other (3)

P. Yeh and C. Gu, Optics of Liquid Crystal Displays (Wiley, 1999).

H.J.Coufal, D.Psaltis, and B.T.Sincerbox, eds., Holographic Data Storage (Springer-Verlag, 2000).

R. K. Kostuk, M. P. Bernal, and Q. Cao, in Holographic Data Storage, H.J.Coufal, D.Psaltis, and G.T.Sincerbox, eds. (Springer-Verlag, 2000).

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Figures (2)

Fig. 1
Fig. 1

Normalized intensity and phase-shift modulation. (a) πBPM configuration; (b) HTM configuration. Vertical lines indicate the gray levels selected to realize each of the modulation regimes.

Fig. 2
Fig. 2

FT obtained from randomized binary data pages: (a), (c), and (e), using πBPM (gray levels 0 and 198); (b), (d), and (f), using HTM (gray levels 0, 193, and 250). The bit size is 16 × 16 pixels in (a) and (b), 8 × 8 pixels in (c) and (d), and 4 × 4 pixels in (e) and (f).

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