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Proceedings Paper

Femtosecond time-resolved backscattering from strongly scattering media
Author(s): Christoph G. Hauger; T. Wilhelm; E. Baigar; Wolfgang Zinth
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Paper Abstract

Time-resolved backscattering from randomly scattering media is studied experimentally with the aim of human skin diagnosis. The experimental setup consists of a self-modelocked Ti:Sapphire laser and a light gating technique based on sum-frequency generation. Aqueous solutions of latex microspheres were used as scattering medium. The experimentally determined temporal profiles of the recorded backscattered photons significantly depend on the specific conditions of the whole optical system. A systematic variation of the optical parameters was performed and an optimum arrangement was determined. In a first set of experiments, relatively weak concentrations of the scatterers were investigated and scattering lengths were determined. In a second series of experiments two-layered samples of latex suspensions with scattering properties similar to human skin were studied. Under these scattering conditions penetration depths of more than 1 mm could be obtained.

Paper Details

Date Published: 31 January 1995
PDF: 7 pages
Proc. SPIE 2326, Photon Transport in Highly Scattering Tissue, (31 January 1995); doi: 10.1117/12.200849
Show Author Affiliations
Christoph G. Hauger, Institut fuer Medizinische Optik (Germany)
T. Wilhelm, Institut fuer Medizinische Optik (Germany)
E. Baigar, Institut fuer Medizinische Optik (Germany)
Wolfgang Zinth, Institut fuer Medizinische Optik (Germany)

Published in SPIE Proceedings Vol. 2326:
Photon Transport in Highly Scattering Tissue
Sigrid Avrillier; Britton Chance; Gerhard J. Mueller; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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