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Published on: February 12, 2013
Double acousto-optic deflector system for increased scanning range of laser beams
J-C Kastelik1, S Dupont1, K B Yushkov2
1Université 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.
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.
