This article is cited in 24 papers

Special issue devoted to multiple radiation scattering in random media

Propagation of a femtosecond pulse in a scattering medium: theoretical analysis and numerical simulation

E. A. Sergeeva^a, M. Yu. Kirillin^bc, A. V. Priezzhev<sup>bd

a</sup> Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod
^b Lomonosov Moscow State University, Faculty of Physics
^c Department of Technology, Optoelectronics and Measurements Techniques Laboratory, University of Oulu, Finland
^d International Laser Center of Moscow State University

Abstract: The time profile of a femtosecond pulse propagating in media with a high scattering anisotropy (g≥0.9) is studied in detail. The iteration method based on the expansion of the light field in a series in photon scattering orders with the account for the multiply scattered component is proposed to study analytically the structure of a scattered radiation pulse. The small-angle approximation of the radiation transfer theory used for calculations of low-order scatterings is modified to take into account the spread in the photon delay times. The shape of a scattered ultrashort pulse calculated theoretically well agrees with the shape obtained by the Monte-Carlo simulation. It is shown that the pulse profile in a scattering medium depends on the shape of the scattering phase function with the conservation of the anisotropy factor. A comparative analysis of contributions from different scattering orders to the pulse structure is performed depending on the optical properties of a scattering medium.

PACS: 42.25.Dd, 42.25.Fx, 42.65.Re

Received: 27.06.2006
Revised: 21.09.2006

 English version: Quantum Electronics, 2006, 36:11, 1023–1031

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