Conditions during passage of short optical pulses across a strongly scattering mediumстатья
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Дата последнего поиска статьи во внешних источниках: 27 января 2016 г.
Аннотация:A transient two-flux model of the interaction of light with a strongly scattering medium is developed on the basis of the concept of paraxial photons propagating along the direction of a thin pulsed laser beam incident on such a medium. An analytic expression for the radiation flux transmitted by a scattering medium is derived. Calculations are made of the dependences of the parameters of the temporal distribution of the transmitted radiation on the characteristics of the scattering medium. It is shown that the absorption and scattering coefficients of such a medium can be determined from the profile of the temporal distribution of the transmitted radiation. An experimental determination of the temporal distribution is reported for the radiation from a picosecond neodymium laser transmitted by a model scattering medium (a solution of dried milk in water). The experimental results are described well by the theoretical model.