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Improved phase hologram design for generating symmetric light spots and its application for laser writing of waveguides

机译:用于产生对称光斑的改进相位全息图设计及其在波导激光写入中的应用

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摘要

The improved method for calculation of a phase hologram and its application to laser writing of waveguides with a spatial light modulator are presented. It was found that the amplitude and phase distributions of light spots generated by a phase hologram can be distorted compared to those of a focused single beam. The distortion of light spots could be reduced by adding a simple constraint, in which light intensities around a light spot should be as small as possible, to the conventional calculation method of a phase hologram. It was also demonstrated that the improved calculation method can be considered essential for laser writing of waveguides.
机译:提出了一种改进的相全息图计算方法及其在具有空间光调制器的波导激光写入中的应用。已经发现,与聚焦的单束光束相比,由相位全息图产生的光斑的幅度和相位分布会失真。通过在相位全息图的常规计算方法中增加简单的约束,即光斑周围的光强度应尽可能小,可以减少光斑的畸变。还证明了改进的计算方法可以被认为是波导的激光写入所必需的。

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