Abstract
Based on the diffusion approximation theory, this paper researched quantitatively the influence of the thickness, the absorption coefficient, the scattering coefficient, and the anisotropy coefficient on the ultrashort laser pulse transmitted through turbid biological tissues. After transmitting through the turbid media, several picoseconds laser pulse will be widened by the diffusive scattering. The various medium parameters have much different influences on the intensity and shape of the transmitting ultrashort laser pulse. The paper concluded that the basic optical parameters of tissues can be acquired by analysing the pulse shape, and that the change of the pulse shape is mainly influenced by the scattering other than absorption. The research results can be used in optical diagnostics.
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