In this work, optical propagation through turbid media is analyzed by FDTD simulation. In particular, the method is
applied to biological tissues. Continuous light propagation in turbid media has been widely studied, but pulsed light
propagation has received less interest due to its complexity. Therefore, in this work we focus on pulsed light. FDTD
method is applied to several media with optical parameters in the typical range of those observed in biological tissues.
We perform an analysis of the variations of pulsed light propagation as a function of the scatterers characteristics
(namely size, concentration, and optical contrast). The results are compared with those obtained by the use of the
diffusion approximation. The potential of the FDTD method over the diffusion model is given by its high accuracy, its
capacity to perform time-resolved simulations, and the fact that it carries all the information about the phase and
coherence of the wavefront. The results of this work can be applied to a wide range of areas of interest like the time-resolved
study of ultrashort light pulses propagation, the optimization of optical penetration depth, the coherence
properties of pulsed light, and the effect of modified wavefronts in light propagation.