Effects of the Incidence of a Gaussian Temporal Short-Pulse Laser of Different Spatial Profiles on a Two-Dimensional, Rectangular, Inhomogeneous Participating Medium

This article deals with the effects of a short-pulse laser of Gaussian temporal and different spatial profiles on the signals emanating from a two-dimensional rectangular participating medium containing localized inhomogeneities. An incident short-pulse laser of Gaussian temporal profile has spatial loading on the south boundary either as a Gaussian or as a step function. The absorbing and scattering participating medium consists of a localized circular or elliptical inhomogeneity. The extinction coefficient of the inhomogeneity is the same as the containing medium, while its scattering albedo is different. Transmittance and reflectance signals are analyzed for the effects of the extinction coefficient and the spatial profile of the incident short-pulse laser. Spatial distributions of the signals along the boundaries and temporal evolution of the heat flux distributions inside the medium are also studied. The problem is analyzed using the finite-volume method.