Path-length distribution and path-length-resolved Doppler measurements of multiply scattered photons by use of low-coherence interferometry

Anna Petoukhova, Wiendelt Steenbergen, F.F.M. de Mul

Research output: Contribution to journalArticleAcademicpeer-review

36 Citations (Scopus)

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 f luctuations 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.
Original languageEnglish
Pages (from-to)1492-1494
Number of pages3
JournalOptics letters
Volume26
Issue number19
DOIs
Publication statusPublished - 2001

Keywords

  • IR-71730
  • METIS-200111

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