Bordakevich Sebastián, Rebón Lorena, Ledesma Silvia
Appl Opt. 2022 Feb 1;61(4):969-977. doi: 10.1364/AO.444721.
Spatial light modulators are widely used to perform modulations of different properties of the electromagnetic field. In this work, a simple optimization method for general double-pass setups was developed. It takes into account the involved polarizing elements and displays, and a numerical simulation based on an exhaustive search routine finds the optimal optical axis orientations of the polarizing elements for the desired modulation. By simultaneously considering both impingements, we are able to take full advantage of the modulation capabilities of the chosen spatial light modulators. In particular, different polarization modulations and complex amplitude modulations were studied for twisted nematic liquid crystal displays and passive linear optical elements. Examples of different optimization criteria are shown and compared with experimental results, supporting the feasibility of this approach. This method offers the possibility of independent modulation of two properties of the input light state, outperforming the use of a single screen.
空间光调制器被广泛用于对电磁场的不同特性进行调制。在这项工作中，开发了一种用于一般双程设置的简单优化方法。该方法考虑了所涉及的偏振元件和显示器，并且基于穷举搜索程序的数值模拟找到了用于所需调制的偏振元件的最佳光轴方向。通过同时考虑两种入射情况，我们能够充分利用所选空间光调制器的调制能力。特别是，针对扭曲向列型液晶显示器和无源线性光学元件研究了不同的偏振调制和复振幅调制。展示了不同优化标准的示例并与实验结果进行了比较，支持了该方法的可行性。该方法提供了独立调制输入光状态的两个特性的可能性，优于使用单个屏幕的情况。
