Using only ~5 mw laser power, we imaged in backscattering mode a nonlinear absorbing object at 2.5 mm depth, which is five times the mean-free-path-length in a turbid medium, by optimizing the detection.
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(180.0180) Microscopy : Microscopy
(180.4315) Microscopy : Nonlinear microscopy
L. Cui and W. Knox, "Enhancement of Penetration Depth for Backscattering-Mode Nonlinear-Absorption Imaging in Turbid Media," in Frontiers in Optics 2010/Laser Science XXVI, OSA Technical Digest (CD) (Optical Society of America, 2010), paper FWY3.
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