In order to improve the performance of a communication system, a novel concept of low-crosstalk demodulating vortex beams by a combination of partial-receiving apertures (PRAs) is proposed. The corresponding theory analysis and simulations are performed for certifying the valid of the proposed concept in theory. A proof-of-concept experiment is also proposed and established to verity the feasibility of the proposed concept in practice. Based on the captured intensity-array profiles in experiments, the total crosstalk, which is induced by partial receiving apertures, can be evenly distributed among the parasitic orbital angular momentum (OAM) modes, then the maximum ratio of intensity between the induced parasitic OAM modes and the propagated OAM modes can be notably decreased when two unsymmetrical PRAs are utilized. The measured bit error rate curves (with respect to the differently-placed PRAs) also show that the performance of system can be improved in sequence when three way...

中文翻译：

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通过自由空间中两个部分接收孔径的组合来低串扰解调涡流束

为了改善通信系统的性能，提出了一种通过结合部分接收孔径（PRA）来对涡流束进行低串扰解调的新颖概念。进行相应的理论分析和仿真，以验证所提出概念在理论上的有效性。还提出并建立了概念验证实验，以验证所提出概念在实践中的可行性。根据实验中捕获的强度阵列轮廓，由部分接收孔引起的总串扰可以均匀分布在寄生轨道角动量（OAM）模式之间，然后是诱导的寄生OAM模式之间的最大强度比当使用两个不对称的PRA时，可以显着降低传播的OAM模式。