Investigation of the temporal spread of an ultrashort light pulse on transmission through a highly scattering medium

Abstract

An experimental and theoretical investigation of the temporal spread of an ultrashort light pulse on transmission through a highly scattering medium has been made. For the strongly diffuse light, the transmitted pulse may be described by a universal function whose duration can be directly related to the width of the sample. For sufficiently scattering samples, experimental data and the diffusion approximation indicate that the output pulse duration scales with the square root of the sample width.

Microscopy with self-reconstructing beams

“…It has yet to be investigated to which degree the nonlinear-fluorescence excitation by Bessel beams offers an improvement in the presence of strong dispersion of the pulsed illumination light [Johnson et al, 2003, Bruce et al, 1995. Adaptive optics may also be able to improve the spatiotemporal shape of Bessel beams in scattering media.…”

Backscattering phenomena on range-gated imaging in short-range turbid water media

“…Hence, the predictions from Equation 3.8 should be compared at the same initial point. This approach is similar to the work done by Bruce et al [161] 1.00 t 1 = 16ns, t 2 = 4ns 1.50 t 1 = 12ns, t 2 = 3ns 2.00 t 1 = 10ns, t 2 = 2ns 3.00 t 1 = 8ns, t 2 = 1.5ns…”

Propagation stability of self-reconstructing Bessel beams enables contrast-enhanced imaging in thick media

“…Because of the longer wavelength used the increase in axial resolution is typically small. Moreover, it has yet to be investigated to which degree the nonlinear fluorescence excitation by Bessel beams offers an improvement in the presence of strong scattering, especially when considering pulse dispersion of the illumination light 18,19 .…”