Path-length distribution and path-length-resolved Doppler measurements of multiply scattered photons by use of low-coherence interferometry
Optics Letters, Vol. 26, Issue 19, pp. 1492-1494 (2001)
http://dx.doi.org/10.1364/OL.26.001492
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Abstract
We report first results of measurements by low-coherence Doppler interferometry of the path-length distribution of photons undergoing multiple scattering in a highly turbid medium. We use a Mach–Zehnder interferometer with multimode graded-index fibers and a superluminescent diode as the light source. The path-length distribution is obtained by recording of the heterodyne fluctuations that arise from the Brownian motion of particles in an Intralipid suspension as a function of the optical path length. The experimental path-length distribution is in good agreement with predictions of Monte Carlo simulations. In the heterodyne spectrum, an increase of the mean Doppler frequency with path length is observed.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(170.3340) Medical optics and biotechnology : Laser Doppler velocimetry
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(170.7050) Medical optics and biotechnology : Turbid media
(260.3160) Physical optics : Interference
Citation
Anna L. Petoukhova, Wiendelt Steenbergen, and Frits F. M. de Mul, "Path-length distribution and path-length-resolved Doppler measurements of multiply scattered photons by use of low-coherence interferometry," Opt. Lett. 26, 1492-1494 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-19-1492
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