title: Acousto-optic lens for pulsed lasers.
abstract: Theoretical predictions of the acousto-optic interaction under Raman-Nath conditions of ultrasound and laser light with a beam width w comparable to or smaller than the ultrasonic wavelength lambda are experimentally investigated, and good agreement between experiment and prediction is found. The experimental setup consists of a pulsed laser, emitting pulses that are synchronized with the sound frequency by means of a controllable delay time. When w approximately lambda, strong focusing is obtained for most delay times. The lensing properties of this configuration are carefully investigated.
authors.affiliation: Kulak, Interdisciplinary Research Centre, Etienne Sabbelaan 53, B-8500 Kortrijk, Belgium. filip.windels@kulak.ac.be
authors.forename: F
authors.initials: F
authors.lastname: Windels
authors.forename: P
authors.initials: P
authors.lastname: Kwiek
authors.forename: G
authors.initials: G
authors.lastname: Gondek
authors.forename: K
authors.initials: K
authors.lastname: Van den Abeele