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Journal Articles Optics Express Year : 2005

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

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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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Dates and versions

hal-00671127 , version 1 (16-02-2012)

Identifiers

  • HAL Id : hal-00671127 , version 1

Cite

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, 2005, 13 (18), pp.7097-7112. ⟨hal-00671127⟩
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