Abstract
For energy applications of high-power laser systems, uniform patterns are especially important in inertial confinement fusion research. We have demonstrated alignment control of liquid crystals using photoisomerization induced by polarized ultraviolet light to fabricate a polarization control plate. A glass substrate of a liquid-crystal cell, coated with polyvinyl alcohol doped with azo dye, was illuminated with a linearly polarized third harmonic of a Nd:YAG laser light. We confirmed the alignment of liquid crystals within the illuminated region dependent on the polarization direction of the ultraviolet light through the photoisomerization of azo dye molecules. Reduction of laser speckle pattern contrast by a polarization control plate was discussed.
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