Path-length distribution and path-length-resolved Doppler measurements of multiply scattered photons by use of low-coherence interferometry
| Autor: | Anna L. Petoukhova, Frits F. M. de Mul, Wiendelt Steenbergen |
|---|---|
| Přispěvatelé: | Faculty of Science and Technology, Biomedical Photonic Imaging |
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Physics
medicine.diagnostic_test business.industry METIS-200111 Physics::Optics Superluminescent diode Atomic and Molecular Physics and Optics Light scattering symbols.namesake Interferometry Speckle pattern IR-71730 Optics Path length Optical coherence tomography symbols medicine business Doppler effect Optical path length |
| Zdroj: | Optics letters, 26(19), 1492-1494. The Optical Society |
| ISSN: | 0146-9592 |
| DOI: | 10.1364/ol.26.001492 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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