We present a photon noise and diffraction-limited imaging method combining an 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 Letter, 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 technique, and we demonstrate the suppression of the parasitic feedback.
© 2012 Optical Society of AmericaFull Article | PDF Article
Lei Sui, Ronald A. Roy, Charles A. DiMarzio, and Todd W. Murray
Appl. Opt. 44(19) 4041-4048 (2005)
Gloria M. Spirou, Andreas Mandelis, I. Alex Vitkin, and William M. Whelan
Appl. Opt. 47(14) 2564-2573 (2008)
Eric Lacot, Olivier Jacquin, Grégoire Roussely, Olivier Hugon, and Hugues Guillet de Chatellus
J. Opt. Soc. Am. A 27(11) 2450-2458 (2010)