Detection and Demultiplexing of Cylindrical Vector Beams Enabled by Rotational Doppler Effect

Cylindrical vector beams (CVBs) detection is of vital significance in various kinds studies such as particle observation and mode-division multiplexing (MDM). Herein, a comprehensive CVBs based on the rotational Doppler effect (RDE) including analysis topological charge (TC), relative amplitude module, phase for superimposed mode bases realized. A demultiplexing scheme constructed through complex harmonic terms beating signal. The method resolves both absolute values signs TC CVB simultaneously, which cannot be simply realized by existing polarization examination techniques. It may big potential related research since an efficient, quantitative, complete to detect verified starting from this work.