Vol. 19, issue 10, article # 4

pdf Kokhanenko G. P. Time structure of light field from a point source in scattering medium. // Atmospheric and oceanic optics. 2006. V. 19. No. 10. P. 765-772.
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Pulsed radiation undergoes distortions due to the multiple scattering effects while propagated through a layer of a scattering medium. This paper presents the results on the time shape of a pulse calculated numerically for the cases of media with different scattering phase functions. It is shown that even at rather large optical thickness (τ ≈ 10-20), time shape of scattered radiation pulse cannot be described using diffusion theories, being, as a rule, a bimodal distribution. Only at a significant increase in optical thickness (τ > 100-150), the photon distribution over photon free paths takes a unimodal "diffusion" shape.