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Real-time 2D imaging in turbid media using a femtosecond Cr/sup 4+/:forsterite laser

Imaging through turbid media using optical radiation has been of particular interest because of the potential applications in medical diagnostics, such as pathology or tumor detection. Consequently, many optical methods have been developed to detect objects embedded in strongly scattering media, including time-gating or coherence-gating imaging to discriminate between the early-arriving ballistic photons and the time-delayed scattered photons. In this paper, we demonstrate the efficiency of a femtosecond Cr/sup 4+/:forsterite laser source (1220 nm, 50 fs, 50 /spl mu/J/pulse) for real-time 2D imaging through scattering media using an optical nonlinear time-gating technique.