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Adaptive Holography in Liquid Crystal Light-Valves
INLN, Université de Nice-Sophia Antipolis, CNRS,1361 route des Lucioles, 06560 Valbonne, France
Jphopto, 20 Rue Campo Formio, 75013 Paris, France
* Author to whom correspondence should be addressed.
Received: 18 July 2012; in revised form: 13 August 2012 / Accepted: 20 August 2012 / Published: 27 August 2012
Abstract: By performing two-wave mixing experiments in a liquid crystal light-valve, optical beam amplification is obtained as a strongly resonant process to which a narrow frequency bandwidth is associated. This property is exploited to realize adaptive holographic interferometric systems able to efficiently detect displacements as small as fraction of picometers. Pressure radiation induced deformations of a reflecting membrane are measured with the same type of system. Then, when used with complex wavefronts, like speckle fields, the LCLV-based interferometer allows to detect extremely small phase modulations. The examples shown demonstrate the potentialities of the light-valve for dynamic holography applications.
Keywords: adaptive holography; liquid crystals; picometer detection
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Bortolozzo, U.; Residori, S.; Huignard, J.-P. Adaptive Holography in Liquid Crystal Light-Valves. Materials 2012, 5, 1546-1559.
Bortolozzo U, Residori S, Huignard J-P. Adaptive Holography in Liquid Crystal Light-Valves. Materials. 2012; 5(9):1546-1559.
Bortolozzo, Umberto; Residori, Stefania; Huignard, Jean-Pierre. 2012. "Adaptive Holography in Liquid Crystal Light-Valves." Materials 5, no. 9: 1546-1559.