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Theoretical description of the photorefractive detection of the ultrasound modulated photons in scattering media

Abstract : Acousto-optic imaging of thick biological tissues can be obtained in real-time with an adaptive-wavefront holographic setup, where the holographic media is a self-developping photorefractive crystal. As a consequence, the interference signal resulting from the acousto-optic effect can be easily collected with a high etendue and fast single photodetector. We present a statistical model of the field propagating through the scattering media and show why the various acoustic frequency components contained in the speckle output pattern are uncorrelated. We then give a detailed description of the signal measured through the photorefractive effect, in order to explain the quadratic pressure response observed for the two commonly used configurations setup e.g an amplitude or a phase modulation of the ultrasound
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https://hal-iogs.archives-ouvertes.fr/hal-00671127
Contributor : Marie-Laure Edwards <>
Submitted on : Thursday, February 16, 2012 - 4:45:59 PM
Last modification on : Saturday, September 26, 2020 - 11:44:07 PM
Long-term archiving on: : Thursday, May 17, 2012 - 2:35:06 AM

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  • HAL Id : hal-00671127, version 1

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Michel Gross, François Ramaz, B.C. Forget, Michael Atlan, Albert-Claude Boccara, et al.. Theoretical description of the photorefractive detection of the ultrasound modulated photons in scattering media. Optics Express, Optical Society of America, 2005, 13 (18), pp.7097-7112. ⟨hal-00671127⟩

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