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arXiv 2001.09135physics.optics
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基于数字微镜装置的全数字Stokes偏振仪

All-Digital Stokes Polarimetry with a Digital Micro-mirror Device

Amogh Manthalkar, Isaac Nape, Najmeh Tabebordbar, Carmelo Rosales-GuzmÁn, Shanti Bhattacharya, Andrew Forbes, Angela Dudley

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摘要：

斯托克斯偏振测量被广泛用于提取光场的偏振结构，通常从六个测量中提取，尽管它只能从四个测量中提取。为了测量所需的强度，大多数方法都是基于光学偏振组件。在这项工作中，我们提出了一种全数字化的方法，使所有四个强度的快速测量没有任何移动组件。我们的方法采用了偏振光栅（PG），同时项目的传入模式到左，右圆偏振态，其次是偏振不敏感的数字微镜器件（DMD），它以数字方式引入相位延迟其余两个偏振态的收购。我们演示了如何将这种技术应用于测量的SOP，矢量和光场的模内相位，没有任何移动组件，并显示出良好的协议与理论，说明快速，实时偏振。

英文摘要：

Stokes polarimetry is widely used to extract the polarisation structure of optical fields, typically from six measurements, although it can be extracted from only four. To measure the required intensities, most approaches are based on optical polarisation components. In this work, we present an all-digital approach that enables a rapid measure of all four intensities without any moving components. Our method employs a Polarisation Grating (PG) to simultaneously project the incoming mode into left- and right-circular polarised states, followed by a polarisation-insensitive Digital Micromirror Device (DMD), which digitally introduces a phase retardance for the acquisition of the remaining two polarisation states. We demonstrate how this technique can be applied to measuring the SoP, vectorness and intra-modal phase of optical fields, without any moving components and shows excellent agreement with theory, illustrating fast, real-time polarimetry.

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