当前位置: X-MOL 学术J. Mod. Optic. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Rapid phase calibration of a spatial light modulator using novel phase masks and optimization of its efficiency using an iterative algorithm
Journal of Modern Optics ( IF 1.3 ) Pub Date : 2020-04-15 , DOI: 10.1080/09500340.2020.1760954
Amar Deo Chandra 1 , Ayan Banerjee 1, 2
Affiliation  

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.

中文翻译:

使用新型相位掩模快速校准空间光调制器并使用迭代算法优化其效率

我们通过采用新型相位掩模开发了一种使用干涉测量法的反射式空间光调制器 (SLM) 的改进相位校准方法。我们使用迭代傅里叶变换算法 (IFTA) 生成优化的相位掩码,并证明它们的性能比查找表 (LUT) 中的全局线性校正效率高 18%\%。此外,我们还在 LUT 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,以提高我们限相 SLM 的效率。在这个过程中,我们明确地确定了我们 SLM 的实际最大相位投射,这为用户提供了验证供应商规格的方法。 除了使用 IFTA 获得具有高均匀性 (~90$\%$) 的 1D/2D 斑点阵列之外,我们的结果举例说明了使用迭代算法来提高相位受限 SLM 的效率。最后,我们的方法实现了三倍更快的相位测量,据我们所知,这是第一次尝试使用干涉测量实现 SLM 的快速相位表征,并且可以在通常需要更快相位校准的设置中具有非常有用的应用。
更新日期:2020-04-15
down
wechat
bug