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Fakultät für Physik


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Impressum
(c) 2002 BMO

"Femtosecond time-resolved backscattering from strongly scattering media"
C. Hauger, T. Wilhelm, E. Baigar, W. Zinth
Progress in Biomedical Optics, Europt Series, SPIE 2326 (1995) 49-55


Abstract:
Time-resolved backscattering from randomly scattering media is studiedexperimentally with the aim of human skin diagnosis. The experimental setup consistsof a self-modelocked Ti:sapphire laser and a light gating technique based onsum-frequency generation. Aqueous solutions of latex microspheres where used asscattering medium. The experimentally determined temporal profiles of the recordedbackscattered photons significantly depend on the specific conditions of the wholeoptical system. A systematic variation of the optical parameters was performed and anoptimum arrangement was determined. In a first set of experiments, relatively weakconcentrations of the scatterers were investigated and scattering lengths weredetermined. In a second series of experiments two-layered samples of latexsuspensions with scattering properties similar to human skin were studied. Underthese scattering conditions penetration depths of more than 1mm could be obtained.

BMO authors (in alphabetic order):
Erik Baigar
Thomas Wilhelm
Wolfgang Zinth


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Letzte Änderung: 2016-09-14 13:34