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Opt Lett. 2011 Sep 1;36(17):3332-4. doi: 10.1364/OL.36.003332.

Direct determination of diffusion properties of random media from speckle contrast.

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  • 1Institut Langevin, École Supérieure de Physique et de Chimie Industrielles de la ville de Paris (ESPCI Paris-Tech), CNRS UMR 7587, UPMC Université Paris 6, Paris, France.


We present a simple scheme to determine the diffusion properties of a thin slab of strongly scattering material by measuring the speckle contrast resulting from the transmission of a femtosecond pulse with controlled bandwidth. In contrast with previous methods, our scheme does not require time measurements nor interferometry. It is well adapted to the characterization of samples for pulse shaping, nonlinear excitation through scattering media, and biological imaging.

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