Analysis of the spatial intensity distribution of a CW laser light through tissue-like turbid media

Abstract

We analyze the two-dimensional spatial intensity distribution of a CW laser light with Gaussian profile through tissue-like turbid media via calculation and experiment. The results show that the spatial intensity distribution of laser depends on the scattering coefficient, absorption coefficient, and the anisotropy factor of the turbid media. The full width at half maximum (FWHM) of the normalized intensity of the light spatial intensity distribution increases with an increase of the scattering coefficient. But the FWHM of the spatial intensities’ distribution of the CW laser light through turbid media does not increase monotonously with an increase of the anisotropy factor. Besides, the spatial intensity distribution is dependent on the absorption coefficient when considering a given scattering coefficient. The two-dimensional spatial intensity distribution narrows with an increase of absorption coefficient. As one of the potential applications, we finally perform an experiment to image an object hidden behind a turbid medium.