Parallel sorting of orbital and spin angular momentum components of structured optical beams is demonstrated. Both spin channels are multiplexed within the novel orbital angular momentum (OAM) sorter, reducing the size, weight, and number of elements. The sorted states are linearly spaced over 70 topological charge values. We experimentally and theoretically evaluate the operational range and crosstalk between neighboring channels and find that 30 orbital angular momentum states are available per spin channel for quantum communication or cryptography. This is achieved using an angular momentum sorter that we developed based on geometric phase optical elements. We present two devices consisting of liquid crystal polymer films photoaligned with complex two-dimensional patterns.

中文翻译：

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在记录的大量通道中对光的轨道角和自旋角动量进行并行排序

演示了结构化光束的轨道和自旋角动量分量的并行分类。两个自旋通道都在新颖的轨道角动量（OAM）分类器中多路复用，从而减小了尺寸，重量和元素数量。排序状态在70个拓扑电荷值上线性间隔。我们通过实验和理论上的评估相邻通道之间的工作范围和串扰，发现每个自旋通道可使用30个轨道角动量状态进行量子通信或加密。这是使用我们基于几何相位光学元件开发的角动量分选器实现的。我们介绍了两个由液晶聚合物薄膜组成的设备，这些薄膜与复杂的二维图案进行了光对准。