Rapid phase calibration and increased efficiency of a spatial light modulator using novel phase masks and an iterative algorithm.
Rapid phase calibration and increased efficiency of a spatial light modulator using novel phase masks and an iterative algorithm.
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DOI：
10.1080/09500340.2020.1760954
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发表时间：
2018-11
期刊：
影响因子：
--
通讯作者：
A. Chandra;Ayan Banerjee
中科院分区：
文献类型：
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作者：
A. Chandra;Ayan Banerjee
提出了一种改进的反射式空间光调制器（SLM）干涉相位标定方法。我们使用迭代傅里叶变换算法（IFTA）生成优化的相位掩模，并证明它们执行18$\%$更好的效率超过全局线性校正的查找表（LUT）。此外，我们还在查找表中实现了全局线性校正，并相应地修改了闪耀光栅的相位编码，以提高我们的相位限制SLM的效率。在这个过程中，我们明确地确定了我们的SLM的实际最大相位投掷，这为用户提供了一个配方，以验证供应商的specifics. But获得具有高均匀性（~90$\%$）的一维/二维斑点阵列使用IFTA，我们的结果证实了使用迭代算法，以提高效率的相位限制SLM。最后，我们的方法使三倍更快的相位测量，并尽我们所知，是第一次努力实现快速相位特性的SLM使用干涉测量，可以有非常有用的应用程序中的设置，往往需要更快的相位校准。
We develop an improved phase calibration method of a reflective spatial light modulator (SLM) using interferometry by employing novel phase masks. We generate the optimised phase masks by using Iterative Fourier Transform Algorithm (IFTA) and demonstrate that they perform with 18$\%$ better efficiency over global linear corrections in the look-up table (LUT). In addition, we also implement global linear corrections in the LUT and correspondingly modify the phase encoding of blazed gratings to improve the efficiency of our phase-limited SLM. In the process, we definitively determine the actual maximum phase throw of our SLM which provides a recipe for users to verify supplier specifications.Besides obtaining array of 1D/2D spots having high uniformity (~90$\%$) using IFTA, our result exemplifies the use of iterative algorithms for improving efficiency of phase limited SLMs. Finally, our method enables threefold faster phase measurements, and to the best of our knowledge, is the first endeavour directed towards enabling rapid phase characterisation of an SLM using interferometric measurements and can have very useful applications in settings which often require faster phase calibrations.