Double acousto-optic deflector system for increased scanning range of laser beams

J-C Kastelik; S Dupont; K B Yushkov; V Ya Molchanov; J Gazalet

doi:10.1016/j.ultras.2017.04.014

Double acousto-optic deflector system for increased scanning range of laser beams

Ultrasonics. 2017 Sep:80:62-65. doi: 10.1016/j.ultras.2017.04.014. Epub 2017 May 2.

Authors

J-C Kastelik¹, S Dupont², K B Yushkov³, V Ya Molchanov³, J Gazalet²

Affiliations

¹ Université Lille Nord de France, 59000 Lille, France; Université de Valenciennes et du Hainaut-Cambrésis, IEMN-DOAE, Le Mont Houy, 59313 Valenciennes Cedex 9, France; CNRS, UMR 8520, 59650 Villeneuve d'Ascq, France. Electronic address: Jean-Claude.Kastelik@univ-valenciennes.fr.
² Université Lille Nord de France, 59000 Lille, France; Université de Valenciennes et du Hainaut-Cambrésis, IEMN-DOAE, Le Mont Houy, 59313 Valenciennes Cedex 9, France; CNRS, UMR 8520, 59650 Villeneuve d'Ascq, France.
³ Acousto-Optical Research Center, National University of Science and Technology "MISIS", 4 Leninsky prospect, 119049 Moscow, Russia.

PMID: 28500905
DOI: 10.1016/j.ultras.2017.04.014

Abstract

A new laser scanning system is presented based on two wide-band acousto-optic deflectors. The interaction medium is tellurium dioxide. Anisotropic interactions take place under two different tangential phase matching configurations in such a way that the acousto-optic bandwidths add up. We demonstrate the feasibility of such a cascade deflection system for the wavelength of λ=514nm. The total frequency bandwidth is Δf=100MHz, equally distributed between the two acousto-optic deflectors. The total angular scan at the output is Δθ=4.4° leading to 125 resolvable spots for a 1mm truncated Gaussian beam.

Keywords: Acoustooptics; Deflector; Paratellurite.

Publication types

Research Support, Non-U.S. Gov't