title: Experimental and numerical analysis of ballistic and scattered light using femtosecond optical Kerr gating: a way for the characterization of strongly scattering media.
abstract: We have developed a new experimental setup based on optical Kerr gating in order to isolate either the transmitted or the scattered light going through an optically thick medium. This selectivity can be obtained by finely tuning the focusing of the different laser beams in the Kerr medium. We have developed an experimental setup. A Monte Carlo simulation scheme generates an accurate model of scattering processes taking into account the time of flight, the geometry of the Kerr gating and the polarization. We show that our experimental setup is capable of analyzing the transmitted light with optical densities up to OD = 9.7, and scattered light beyond OD = 347 in poly-disperse silica spheres in water (distribution centered on ~0.9 µm radius) at λ = 550 nm. Strongly positive correlations are obtained with simulations.
authors.affiliation: ONERA – The French Aerospace Lab, F-31055 Toulouse France. Thibault.dartigalongue@onera.fr
authors.forename: François-Xavier
authors.initials: FX
authors.lastname: d'Abzac
authors.forename: Myriam
authors.initials: M
authors.lastname: Kervella
authors.forename: Laurent
authors.initials: L
authors.lastname: Hespel
authors.forename: Thibault
authors.initials: T
authors.lastname: Dartigalongue
mesh_terms: D003198:Computer Simulation; D008027:Light; D015233:Models, Statistical; D009391:Nephelometry and Turbidimetry / Q000379:methods*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation