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Proceedings Paper

Time-resolved optical phase space distributions for coherent backscatter
Author(s): Adam Wax; Frank Reil; Kim Fook Lee; Samir Bali; John E. Thomas
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Paper Abstract

We explore enhanced backscatter from a random medium using time-resolved optical phase space measurement, i.e. measurement ofjoint position and momentum (x, p) distributions of the light field as a function of propagation time in the medium. Enhanced backscatter is a coherent effect and is not predicted by radiative transport theories. By using a low-coherence source in a heterodyne detection scheme, we observe enhanced backscattering resolved by path length in the random medium, effectively providing timing resolution. Such time-resolved studies are important for exploring the evolution of optical coherence as a function of penetration depth in the random medium. Optical phase space methods provide a visual as well as quantitative method of characterizing the spatial coherence properties and wavefront curvature of the input and scattered fields. These techniques may provide new venues for using optical coherence in medical imaging.

Paper Details

Date Published: 6 April 2000
PDF: 5 pages
Proc. SPIE 4001, Saratov Fall Meeting '99: Optical Technologies in Biophysics and Medicine, (6 April 2000); doi: 10.1117/12.381482
Show Author Affiliations
Adam Wax, Duke Univ. (United States)
Frank Reil, Duke Univ. (United States)
Kim Fook Lee, Duke Univ. (United States)
Samir Bali, Duke Univ. (United States)
John E. Thomas, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 4001:
Saratov Fall Meeting '99: Optical Technologies in Biophysics and Medicine
Valery V. Tuchin; Dmitry A. Zimnyakov; Alexander B. Pravdin, Editor(s)

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