Detection of nondelayed photons in the forward-scattering of picosecond pulses

Andreoni, A.; Bondani, M.; Brega, A.; Paleari, F.; Spinelli, A.S.; Zambr, G.
March 2004
Applied Physics Letters;3/29/2004, Vol. 84 Issue 13, p2457
Academic Journal
We perform time-correlated single-photon counting measurements on 9 ps pulses from a cw mode-locked Nd laser passed through highly turbid water suspensions of Intralipid™, which is a phantom medium widely used for light propagation studies. By detecting photons emerging at very small angles with a system whose pulse-response duration is ∼34 ps full width at half-maximum, we obtain time-of-flight distributions in which the contributions of photons nondelayed by scattering events are evident up to very high values of Intralipid concentrations. © 2004 American Institute of Physics.


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