Title

Ultrasound detection through turbid media

Published in:

Optics Letters 28,10 (2003) 819-821;

Abstract

Optical coherence-domain reflectometry and laser-based ultrasound detection have been combined with the use of adaptive optics to detect ultrasound through turbid media. The dynamic hologram in a photorefractive quantum-well device performs as a coherence gate that eliminates multiply scattered background. Quadrature homodyne detection conditions are selected by the choice of center wavelength of the pulse spectrum, requiring no active stabilization or feedback. A depth resolution of 30 mum was achieved, with a pulse duration of nominally 120 fs for ultrasound detection through turbid media up to optical thicknesses of 11 mean free scattering lengths. (C) 2003 Optical Society of America.

Keywords

photorefractive quantum-wells;; light

Date of this Version

January 2003

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