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Reducing the effect of pixel crosstalk in phase only spatial light modulators

Journal article
Authors Martin Persson
David Engström
Mattias Goksör
Published in Optics Express
Volume 20
Issue 20
Pages 22334-22343
ISSN 1094-4087
Publication year 2012
Published at Department of Physics (GU)
Pages 22334-22343
Language en
Links dx.doi.org/10.1364/OE.20.022334
Keywords holographic optical tweezers, diffraction efficiency, generation, kinoforms
Subject categories Physical Sciences

Abstract

A method for compensating for pixel crosstalk in liquid crystal based spatial light modulators is presented. By modifying a commonly used hologram generating algorithm to account for pixel crosstalk, the intensity errors in obtained diffraction spot intensities are significantly reduced. We also introduce a novel method for characterizing the pixel crosstalk in phase-only spatial light modulators, providing input for the hologram generating algorithm. The methods are experimentally evaluated and an improvement of the spot uniformity by more than 100% is demonstrated for an SLM with large pixel crosstalk.

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