Abstract

Light scattering and transmission of Gaussian ($G$) and Laguerre–Gaussian (LG) vortex beams with different orbital angular momentum ($L$) in various turbid media were investigated. Transmittance was measured with varied ratios of sample thickness ($z$) to scattering mean free path ($l_s$) of turbid media, $z/l_s$. In the ballistic region, the LG and $G$ beams were found to have no significant difference on transmittance, while in the diffusive region, the LG beams showed a higher received signal than the $G$ beams, and the LG beams with higher $L$ values showed a higher received signal than those with lower $L$ values. The transition points from ballistic to diffusive regions for different scattering media were determined. This newly observed transmittance difference of LG and $G$ beams may be used for deep target detection in turbid media through LG beam imaging.

© 2016 Optical Society of America

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