Fourier spatial filter acts as a temporal gate for light propagating through a turbid medium.
The temporal profiles of ultrashort light pulses propagating through turbid media of different lengths were measured with a streak camera. Various Fourier spatial filters were used to select the spatial frequencies of the scattered pulses. The temporal profiles of the pulses scattered by a 0.4% Intralipid solution in a cell of 5-cm thickness were signif icantly narrowed because of the removal of the higher-frequency components by a Fourier spatial filter.
Wang
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QZ
Liang
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Wang
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Ho
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Alfano
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