论文标题
量化旋转鸽子棱镜和k-mirror引起的极化变化
Quantifying polarization changes induced by rotating Dove prisms and K-mirrors
论文作者
论文摘要
鸽子棱镜和k-Mirrors是广泛用于旋转光场波前的设备。这些设备具有多种应用，包括测量轨道角动量，显微镜，梁转向和图案识别。但是，通过这些设备实现的波前旋转总是伴随着入射场的极化变化，这在许多这些应用中都是不良特征。尽管已经在一定程度上探索了由鸽子棱镜引起的极化变化，但对于K-MIRROR，尚无此类研究。在这封信中，我们从理论上和实验研究通过旋转的k摩尔引起的透射场引起的极化变化。为了量化这种极化变化，我们定义了数量，平均极化变化d，范围从0到π。我们发现，对于任何发生极化状态，k-mirror可以将d降低到约0.03π。但是，用鸽子棱镜在同一程度上降低D实际上是不可行的。因此，K-MIRROR是在应用中伴随波前旋转需要最小的极化变化的应用中的棱镜的更好替代方法。
Dove prisms and K-mirrors are devices extensively used for rotating the wavefront of an optical field. These devices have several applications, including measurement of orbital angular momentum, microscopy, beam steering and pattern recognition. However, the wavefront rotation achieved through these devices is always accompanied by polarization changes in the incident field, which is an undesirable feature in many of these applications. Although the polarization changes induced by a Dove prism have been explored to quite some extent, no such study is available for a K-mirror. In this letter, we theoretically and experimentally investigate polarization changes induced in the transmitted field by a rotating K-mirror. For quantifying such polarization changes, we define a quantity, mean polarization change D, which ranges from 0 to π. We find that K-mirrors can reduce D to about 0.03π, for any incident state of polarization; however, reducing D to the same extent with a Dove prism is practically unviable. Therefore, K-mirrors are better alternatives to Dove prisms in applications in which the polarization changes accompanying wavefront rotation need to be minimum.
