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Experimental investigation of circular light depolarization using polarization sensitive OCT

Charalambous, Ismini and Cucu, Radu and Dogariu, Aristide and Podoleanu, Adrian (2007) Experimental investigation of circular light depolarization using polarization sensitive OCT. In: Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XI. Proceedings of SPIE . SPIE. ISBN 0-8194-6542-9. (doi:10.1117/12.703710) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1117/12.703710

Abstract

We present an experimental study of the depolarization of circularly polarized (CP) light backscattered from random media. We employ a polarization sensitive OCT, capable of producing intensity profiles for two orthogonal polarization channels simultaneously. For CP light backscattered from polystyrene solutions containing spherical particles of sizes larger than the radiation wavelength, the phenomenon of polarization memory is observed. The degree of circular polarization (DOCP) as a function of the path the light travels in the medium depends on the scatterers' size. In the case of scatterers larger than the wavelength, the DOCP exhibits a minimum indicating a helicity cross-over. The copolarized light then exceeds the intensity of cross-polarized light of backscattered radiation, a phenomenon predicted theoretically but not observed experimentally so far. The helicity cross-over is observed in the DOCP curves for large scatterers at small and large concentrations.

Item Type: Book section
DOI/Identification number: 10.1117/12.703710
Uncontrolled keywords: Depolarization, OCT, Scattering, Degree of circular polarization (DOCP), Orthogonal polarization channels, Polarization memory, Radiation wavelength, Backscattering, Light polarization, Light scattering, Optical tomography, Polystyrenes, Wavelength, Depolarization
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 14:08 UTC
Last Modified: 26 Jul 2019 11:41 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49742 (The current URI for this page, for reference purposes)
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