Speed of the coherent component of femtosecond laser pulses propagating through random scattering media.
The pulse profile and the speed of the coherent component of 85-fs laser pulses propagating through a slab of a random scattering medium were measured. The pulse profile was found to remain essentially the same, while the speed was reduced proportionally to the thickness of the slab and the concentration of the scatterers. The reduction in speed can be accounted for by an effective index of refraction that is described either by the volume fractional combination of the indices of refraction of the scatterers and the water or by the coherent interference between the scattered waves and the primary wave.
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Liu
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Yoo
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Alfano