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Optical Engineering

Phase-modulating bistable optically addressed spatial light modulators using wide-switching-angle ferroelectric liquid crystal layer
Author(s): Solon Mias; Ilias Manolis; Neil Collings; Timothy David Wilkinson; William A. Crossland
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Paper Abstract

We report the use of an experimental ferroelectric liquid crystal material called CDRR8 in bistable optically addressed spatial light modulators for both amplitude- and phase-modulating devices. First, the methods used to improve the alignment and obtain truly bistable switching with CDRR8 are described. The diffraction efficiency and switching characteristics of a bistable CDRR8 optically addressed spatial light modulator used as an amplitude-modulating device and then as a phase-modulating device for encoding high-resolution patterns are compared. The CDRR8 devices exhibit bistability when driven by alternating monopolar pulses. The results show that the use of a device as a phase-modulating rather than an amplitude-modulating device, increases the diffraction efficiency by 10 times. Resolution is better than 100 lp/mm, as measured by the fall in diffraction efficiency by 50% compared with the diffraction efficiency at low spatial frequencies.

Paper Details

Date Published: 1 January 2005
PDF: 7 pages
Opt. Eng. 44(1) 014003 doi: 10.1117/1.1828471
Published in: Optical Engineering Volume 44, Issue 1
Show Author Affiliations
Solon Mias, Institut d'Optique (France)
Ilias Manolis
Neil Collings, Univ. of Cambridge (United Kingdom)
Timothy David Wilkinson, Univ. of Cambridge (United Kingdom)
William A. Crossland, Univ. of Cambridge (United Kingdom)


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