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Proceedings Paper

Coherent backscattering of polarized light for tissue diagnostics: an electric field Monte Carlo study
Author(s): Min Xu
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Paper Abstract

We report on a novel Electric field Monte Carlo (EMC) approach for directly simulating coherent backscattering (CBS) of coherent or partially coherent polarized light. The strong dependence of CBS on the polarization state of light is first demonstrated. The penetration depth of low coherence backscattering light is then investigated using the EMC approach. EMC simulations of linearly polarized light backscattering from a human epithelial tissue model show that the penetration depth of low coherence backscattering light is reduced to the level of one scattering length under illumination by a source of an extreme low spatial coherence. The penetration depth less than one scattering length has not been obtained even when the spatial coherence length is shortened to be one percent of the scattering mean free path. It is found that the penetration depth of low coherence backscattering light may remain orders of magnitude larger than the spatial coherence length of the partially coherent source when the coherence length is shortened in an attempt to shrink the probing depth of light. This calls for a careful interpretation of the penetration depth for low coherence backscattering techniques applied to tissue diagnostics.

Paper Details

Date Published: 20 February 2008
PDF: 10 pages
Proc. SPIE 6854, Optical Interactions with Tissue and Cells XIX, 68541A (20 February 2008); doi: 10.1117/12.762399
Show Author Affiliations
Min Xu, Fairfield Univ. (United States)

Published in SPIE Proceedings Vol. 6854:
Optical Interactions with Tissue and Cells XIX
Steven L. Jacques; William P. Roach; Robert J. Thomas, Editor(s)

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