The introduction of spin and orbital angular momentum mode division multiplexing to existing wavelength division multiplexing will significantly enlarge the capacity of optical networks. Therefore, components compatible with the above techniques are in high demand. Here, a geometric phase combined a Dammann vortex grating, and a polarization grating is designed and encoded to a dual-twist reactive mesogen. It can generate a couple of vortex channel arrays highly efficiently in broadband. Meanwhile, orthogonal spins are spatially separated, facilitating spin identification. A vortex will recover to a Gaussian beam when it is diffracted to an order with opposite topological charge, which enables the detection of orbital angular momentum. It supplies a parallel and efficient way for decoupled spin and orbital angular momentum detection operating at the entire visible range, and the design may be extended to many other compatible optical communication components.

中文翻译：

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通过编程双扭转反应介晶进行宽带解耦自旋和轨道角动量检测

在现有波分复用中引入自旋和轨道角动量模分复用将显着扩大光网络的容量。因此，对与上述技术兼容的组件的需求量很大。在这里，几何相位结合达曼涡旋光栅和偏振光栅被设计和编码到双扭曲反应介晶。它可以在宽带中高效地产生一对涡流通道阵列。同时，正交自旋在空间上是分开的，便于自旋识别。当涡旋被衍射到具有相反拓扑电荷的顺序时，它会恢复为高斯光束，这使得轨道角动量的检测成为可能。