Acousto-optical coherence tomography with a digital holographic detection scheme

Emilie Benoit a La Guillaume (1) , Salma Farahi (1) , Emmanuel Bossy (1) , Michel Gross (2) , François Ramaz (1)

1 IL - Institut Langevin - Ondes et Images (UMR7587)
2 L2C - Laboratoire Charles Coulomb

Acousto-optical coherence tomography (AOCT) consists in using random phase jumps on ultrasound and light to achieve a millimeter resolution when imaging thick scattering media. We combined this technique with heterodyne off-axis digital holography. Two-dimensional images of absorbing objects embedded in scattering phantoms are obtained with a good signal-to-noise ratio. We study the impact of the phase modulation characteristics on the amplitude of the acousto-optic signal and on the contrast and apparent size of the absorbing inclusion.

Domaines: Optique [physics.optics]

Emilie Benoit a La Guillaume, Salma Farahi, Emmanuel Bossy, Michel Gross, François Ramaz. Acousto-optical coherence tomography with a digital holographic detection scheme. Optics Letters, 2012, 37 (15), pp.3216-3218. ⟨10.1364/OL.37.003216⟩. ⟨hal-00741034⟩