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Journal Articles Optics Express Year : 2004

Photorefractive detection of tagged photons in ultrasound modulated optical tomography of thick biological tissues

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Abstract

We present a new and simple method to obtain ultrasound modulated optical tomography images in thick biological tissues with the use of a photorefractive crystal. The technique offers the advantage of spatially adapting the output speckle wavefront by analysing the signal diffracted by the interference pattern between this output field and a reference beam, recorded inside the photorefractive crystal. Averaging out due to random phases of the speckle grains vanishes, and we can use a fast single photodetector to measure the ultrasound modulated optical contrast. This technique offers a promising way to make direct measurements within the decorrelation time scale of living tissues
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Dates and versions

hal-00673420 , version 1 (24-02-2012)

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  • HAL Id : hal-00673420 , version 1

Cite

François Ramaz, B.C. Forget, Michael Atlan, Albert-Claude Boccara, Michel Gross, et al.. Photorefractive detection of tagged photons in ultrasound modulated optical tomography of thick biological tissues. Optics Express, 2004, 12 (22), pp.5469-5474. ⟨hal-00673420⟩
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