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Proceedings Paper

Characterization of vorticity in fluids by a spatially shaped laser beam
Author(s): Anton Ryabtsev; Shahram Pouya; Manoochehr Koochesfahani; Marcos Dantus
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Paper Abstract

Measuring the speed and direction of vortices is of great importance in fluid dynamics. We report on the use of a CW laser beam with a superposition of Laguerre-Gaussian (LG) modes generated by a phase mask imprinted on a two-dimensional spatial light modulator. The shaped beam is then guided and scattered of a sample which is rotated; the rotational frequency is extracted from spectral analysis of the scattered light. This method allows for virtually real-time determination of vorticity characterization in a fluid.

Paper Details

Date Published: 3 March 2015
PDF: 6 pages
Proc. SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII, 93431G (3 March 2015); doi: 10.1117/12.2080238
Show Author Affiliations
Anton Ryabtsev, Michigan State Univ. (United States)
Shahram Pouya, Michigan State Univ. (United States)
Manoochehr Koochesfahani, Michigan State Univ. (United States)
Marcos Dantus, Michigan State Univ. (United States)

Published in SPIE Proceedings Vol. 9343:
Laser Resonators, Microresonators, and Beam Control XVII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Lutz Aschke; Kunihiko Washio, Editor(s)

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