旋转多普勒效应实现的柱面矢量光束的检测和解复用
Detection and demultiplexing of cylindrical vector beams enabled by rotational Doppler effect
摘要：
柱面矢量光束的探测在粒子观测、模分复用等研究中具有重要意义。本文基于旋转多普勒效应实现了对柱面矢量光束的全面检测，包括对模式基的拓扑荷、振幅和相位的分析。我们构造了一种模式解复用方案，通过傅里叶变换获得收集到的散射光拍频信号的振幅、相位。该方法同时解决了CVB拓扑电荷的绝对值和符号的问题，这是现有的极化检测技术所不能简单实现的。本研究为相关研究提供了一个高效、定量、完整的检测CVBs的方法。
英文摘要：
Cylindrical vector beams (CVBs) detection is of vital significance in kinds of studies such as particle observation, mode-division multiplexing. Here we realize a comprehensive detection of cylindrical vector beams based on the rotational Doppler effect including analysis of topological charges, amplitudes, and phases for mode bases. We construct a mode demultiplexing scheme to obtain the amplitudes, phases in beating signal of collected scattering light by Fourier transformation. The method resolves both absolute values and signs of topological charges ofCVB simultaneously, which can not be simply realized by existing polarization examination techniques. It may be of big potential for related researches since an efficient, quantitative and complete scheme to detect CVBs is verified starting from this work.
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