Accurate control of a liquid-crystal display to produce a homogenized Fourier transform for holographic memories
Optics Letters, Vol. 32, Issue 17, pp. 2511-2513 (2007)
http://dx.doi.org/10.1364/OL.32.002511
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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
OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(070.2590) Fourier optics and signal processing : ABCD transforms
(210.2860) Optical data storage : Holographic and volume memories
(230.3720) Optical devices : Liquid-crystal devices
(230.6120) Optical devices : Spatial light modulators
ToC Category:
Optical Devices
History
Original Manuscript: June 5, 2007
Manuscript Accepted: July 11, 2007
Published: August 17, 2007
Citation
Andrés Márquez, Sergi Gallego, David Méndez, Mariela L. Álvarez, Elena Fernández, Manuel Ortuño, Cristian Neipp, Augusto Beléndez, and Inmaculada Pascual, "Accurate control of a liquid-crystal display to produce a homogenized Fourier transform for holographic memories," Opt. Lett. 32, 2511-2513 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-17-2511
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