Acousto-optic lens for pulsed lasers.
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.
Windels
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F
Kulak, Interdisciplinary Research Centre, Etienne Sabbelaan 53, B-8500 Kortrijk, Belgium. filip.windels@kulak.ac.be
Kwiek
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P
Gondek
G
G
Van den Abeele
K
K