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Investigation of liquid crystal Fabry-Perot tunable filters: design, fabrication, and polarization independence

机译：液晶法布里-珀罗可调滤波器的研究：设计，制造和偏振无关

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摘要

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.
机译：对液晶Fabry-Perot可调滤波器进行了详细研究，并特别关注其可制造性，设计，公差和偏振无关性。使用4×4传播矩阵法在数值和分析上进行了计算。对于均匀几何中向列LC的情况，得出了传播矩阵的简化解析表达式。在法线入射下，表明可以使用2×2 Abeles矩阵方法;但是，在倾斜入射时，需要使用4×4矩阵方法。研究了来自楔形光束或非准直光束的移相效果。由于吸收了铟锡氧化物层并作为电极，因此其在镜面多层堆叠中的位置非常重要。发现最佳位置在堆栈中，而不在其顶部或底部。最后，我们给出了与偏振无关的配置的更详细的实验结果，该配置使用偏振分集和Wollaston棱镜。

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