Flicker minimization in an LCoS Spatial Light Modulator

We present a method for reducing the phase flicker originated by the pulsed modulation of a Liquid Crystal on Silicon (LCoS) Spatial Light Modulator (SLM). It consists in reducing the temperature of the LCoS in a controlled way, in order to increase the viscosity of the liquid crystal. By doing this...

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Published in:Optics express 2012-04, Vol.20 (8), p.8431-8441
Main Authors: García-Márquez, Jorge, López, Victor, González-Vega, Arturo, Noé, Enrique
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Language:English
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creator García-Márquez, Jorge
López, Victor
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description We present a method for reducing the phase flicker originated by the pulsed modulation of a Liquid Crystal on Silicon (LCoS) Spatial Light Modulator (SLM). It consists in reducing the temperature of the LCoS in a controlled way, in order to increase the viscosity of the liquid crystal. By doing this, we increase the time response of the liquid crystal, and thus reduce the amplitude of phase fluctuations. We evaluate the efficacy of this method quantifying the temporal evolution of phase shift using an experiment that is insensitive to optical polarization fluctuations. Additionally, we determine the effect of the temperature reduction on the effective phase modulation capability of the LCoS. We demonstrate that a reduction of up to 80% of the flicker initial value can be achieved when the LCoS is brought to -8 °C.
doi_str_mv 10.1364/OE.20.008431
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title Flicker minimization in an LCoS Spatial Light Modulator
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