Reconstructions from computer-generated holograms exhibit spurious duplicate images corresponding to higher diffractive orders, originating from the periodic pixels of a spatial light modulator. We explore the possibility of reducing their visibility by randomization of pixel positions at the stage of displaying of the holograms. Experimental validation is shown on a liquid crystal modulator and also in a promising photo-magnetic transparent cobalt-doped yttrium iron garnet, which exhibits spontaneous randomization of written patterns. Micromirror-driven raster scanning of femtosecond pulses is used for point-by-point rewriting of magnetic domains. Recorded holographic patterns diffract visible light beams in accordance with theory and numerical simulations.

中文翻译：

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在透明介质中随机全息衍射图的光磁记录。

由计算机生成的全息图的重建显示出与较高衍射级相对应的虚假重复图像，这些图像源自空间光调制器的周期性像素。我们探索通过在显示全息图的阶段随机化像素位置来降低其可见度的可能性。实验验证在液晶调制器上以及在有希望的光磁透明钴掺杂钇铁石榴石中均显示，该石榴石表现出书写图案的自发随机性。飞秒脉冲的微镜驱动光栅扫描用于磁畴的逐点重写。记录的全息图根据理论和数值模拟衍射可见光束。