Propagation of circular polarized light in a scattering medium influenced by optical clearing

In the current report an approach of probing a scattering turbid medium with the back-scattered circular polarized light is presented. Circular polarization survives more scattering events than the direction of its propagation, whereas the helicity of backscattered optical radiation depends noticeably on the size of scattering particles. We demonstrate that the helicity flip of circular polarized light can be observed experimentally in the tissue-like media, and that it's sensitive to the direction of light propagation. The flip in helicity is clearly seeing as the polarization vector traverse of the Q - U plane of the Poincare sphere. It has been also shown that influenced by optical clearing the changes of polarization of scattered laser light can be clearly observed and analyzed quantitatively by tracking the polarization vectors on the Poincare sphere.