 |
 |
Journal articles
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
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
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
File
PhD1-55.pdf
Publisher files allowed on an open archive