Isaacs Sivan, Placido Frank, Abdulhalim Ibrahim
Appl Opt. 2014 Oct 10;53(29):H91-101. doi: 10.1364/AO.53.000H91.
Liquid crystal Fabry-Perot tunable filters are investigated in detail, with special attention to their manufacturability, design, tolerances, and polarization independence. The calculations were performed both numerically and analytically using the 4×4 propagation matrix method. A simplified analytic expression for the propagation matrix is derived for the case of nematic LC in the homogeneous geometry. At normal incidence, it is shown that one can use the 2×2 Abeles matrix method; however, at oblique incidence, the 4×4 matrix method is needed. The effects of dephasing originating from wedge or noncollimated light beams are investigated. Due to the absorption of the indium tin oxide layer and as an electrode, its location within the mirror multilayered stack is very important. The optimum location is found to be within the stack and not on its top or bottom. Finally, we give more detailed experimental results of our polarization-independent configuration that uses polarization diversity with a Wollaston prism.
对液晶法布里-珀罗可调谐滤波器进行了详细研究，特别关注其可制造性、设计、公差和偏振无关性。使用4×4传播矩阵法进行了数值计算和解析计算。针对均匀几何结构中向列型液晶的情况，推导了传播矩阵的简化解析表达式。在正入射时，表明可以使用2×2阿贝莱斯矩阵法；然而，在斜入射时，则需要4×4矩阵法。研究了由楔形光束或非准直光束引起的相位延迟效应。由于铟锡氧化物层作为电极会有吸收，其在镜多层堆叠中的位置非常重要。发现最佳位置在堆叠内部，而不是在其顶部或底部。最后，我们给出了使用沃拉斯顿棱镜进行偏振分集的偏振无关配置的更详细实验结果。
