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• W3134793209 abstract "We observe the rotational Doppler shift of an orbital angular momentum-carrying ring Airy Gaussian vortex (RAiGV) beam based on the rotational Doppler effect (RDE) for the first time. The Airy Gaussian beam has attracted a considerable interest in recent years owing to its autofocusing characteristics which indicates an important potential use in optical trapping. Here we propose a scheme for spinning object detection by employing such a RAiGV beam. The RAiGV beam is prepared by a spatial light modulator. An experiment scheme is proposed in a superposition light system, and the results show that the RAiGV has the same well performance in spinning speed detection with other optical vortex beams. It is also found that by varying the scale factor and ring radius of the RAiGV beam, the intensity profile varies accordingly, as well as the autofocusing distance. Especially, we find that a larger scale factor leads to a higher SNR, while as the ring radius changes, the signals are almost not affected. Furthermore, the RDE signal can be recognized with high accuracy even at the autofocusing position, which is confirmed through repeating the measurement along the propagation path of the RAiGV beam. The results of this work may find useful applications in Doppler velocimetry, remote sensing and metrology." @default.
• W3134793209 created "2021-03-15" @default.
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• W3134793209 date "2021-07-01" @default.
• W3134793209 modified "2023-10-16" @default.
• W3134793209 title "Observation of the rotational Doppler shift of the ring Airy Gaussian vortex beam" @default.
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• W3134793209 doi "https://doi.org/10.1016/j.optcom.2021.126900" @default.
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