Characterization of vorticity in fluids by a spatially shaped laser beam

Anton Ryabtsev; Shahram Pouya; Manoochehr Koochesfahani; Marcos Dantus

doi:10.1117/12.2080238

3 March 2015 Characterization of vorticity in fluids by a spatially shaped laser beam

Anton Ryabtsev, Shahram Pouya, Manoochehr Koochesfahani, Marcos Dantus

Proceedings Volume 9343, Laser Resonators, Microresonators, and Beam Control XVII; 93431G (2015) https://doi.org/10.1117/12.2080238
Event: SPIE LASE, 2015, San Francisco, California, United States

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.

Citation Download Citation

Anton Ryabtsev, Shahram Pouya, Manoochehr Koochesfahani, and Marcos Dantus "Characterization of vorticity in fluids by a spatially shaped laser beam", Proc. SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII, 93431G (3 March 2015); https://doi.org/10.1117/12.2080238

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