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Proceedings Paper

Optical vortex beam transmission with different OAM in scattering beads and brain tissue media
Author(s): W. B. Wang; Lingyan Shi; Lukas Lindwasser; Paulo Marque; M. P. J. Lavery; R. R. Alfano
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Paper Abstract

Light transmission of Laguerre Gaussian (LG) vortex beams with different orbital angular momentum (OAM) values (L) in scattering beads and mouse brain tissue media were experimentally investigated for the first time in comparison with Gaussian (G) beams. The LG beams with different OAM were generated using a spatial light modulator (SLM) in reflection mode. The scattering beads media consist of various sizes and concentrations of latex beads in water solutions. The transmissions of LG and G beams through scattering beads and brain tissue media were measured with different ratios of sample thicknesses (z) to scattering mean free path (ls) of the turbid media, z/ls. The results indicate that within the ballistic region where z/ls is small, the LG and G beams show no significant difference, while in the diffusive region where z/ls is higher, the vortex beams show higher transmission than G beams. In the diffusive region, the LG beams with higher L values show higher transmission than the beams with lower L values due to the eigen channels in the media. The transition points from the ballistic to diffusive regions for different scattering beads and brain tissue media were studied.

Paper Details

Date Published: 8 March 2016
PDF: 6 pages
Proc. SPIE 9764, Complex Light and Optical Forces X, 976410 (8 March 2016); doi: 10.1117/12.2213022
Show Author Affiliations
W. B. Wang, The City College of New York (United States)
Lingyan Shi, The City College of New York (United States)
Lukas Lindwasser, The City Univ. of New York (United States)
Paulo Marque, The City College of New York (United States)
M. P. J. Lavery, Univ. of Glasgow (United Kingdom)
R. R. Alfano, The City College of New York (United States)


Published in SPIE Proceedings Vol. 9764:
Complex Light and Optical Forces X
Jesper Glückstad; David L. Andrews; Enrique J. Galvez, Editor(s)

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