Acousto-optic laser optical feedback imaging

Olivier Jacquin (1) , Wilfried Glastre (2) , Eric Lacot (1) , Olivier Hugon (1) , Hugues Guillet de Chatellus (1) , Ramaz François (3)

1 OPTIMA-LIPhy - OPTique et IMAgeries [Grenoble]
2 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]
3 IL - Institut Langevin - Ondes et Images (UMR7587)

We present a photon noise and diffraction limited imaging method combining the imaging laser and ultrasonic waves. The laser optical feedback imaging (LOFI) technique is an ultrasensitive imaging method for imaging objects through or embedded within a scattering medium. However, LOFI performances are dramatically limited by parasitic optical feedback occurring in the experimental setup. In this work, we have tagged the ballistic photons by an acousto-optic effect in order to filter the parasitic feedback effect and to reach the theoretical and ultimate sensitivity of the LOFI technique. We present the principle and the experimental setup of the acousto-optic laser optical feedback imaging (AO-LOFI) technique, and we demonstrate the suppression of the parasitic feedback.

Domaines: Optique [physics.optics]

Olivier Jacquin, Wilfried Glastre, Eric Lacot, Olivier Hugon, Hugues Guillet de Chatellus, et al.. Acousto-optic laser optical feedback imaging. Optics Letters, 2012, 37 (13), pp.2514-2516. ⟨hal-00710229⟩