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Fluid flow vorticity measurement using laser beams with orbital angular momentum

We report on the direct measurements of fluid flow vorticity using a spatially shaped beam with a superposition of Laguerre-Gaussian modes that reports on the rotational Doppler shift from microparticles intersecting the beam focus. Experiments are carried out on fluid flows with well-characterized vorticity and the experimental results are found to be in excellent agreement with the expected values even for 200 ms integration times. This method allows for localized real-time determination of vorticity in a fluid flow.

preprint2016arXivOpen access
A. RyabtsevS. PouyaA. SafaripourM. KoochesfahaniM. Dantus
physics.optics
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Open access5 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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A. RyabtsevS. PouyaA. SafaripourM. KoochesfahaniM. Dantus

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