Abstract
ABSTRACT The principles of the acousto-optic and electro-optic deflectors are shortly reviewed. A novel electro-optic prism-arraylaser beam deflector is proposed and experimentally investigated. Domain inversion in LiNbO3 has been successfullyapplied to realise the new deflector. The digital deflector mode has been investigated and characteristics like deflectionangle, driving voltage etc. have been measured.Keywords: electro-optic deflectors, prism array deflectors, domain inversion, acousto-optic deflectors, Bragg diffraction, Raman-Nath diffraction 1. INTRODUCTION Laser-beam deflectors are important optical elements with a large variety of applications in the measurementtechniques, optical communications, laser-beam machining, etc.Although with some strong performance limitations, most widely spread are the mechanical scanners. One limitation istheir low speed. The scanning frequency typically not exceeding 200/second which is insufficient for many industrialapplications. Another limitation consists in the complexity of the mechanically driven systems. Their performance atindustrial conditions is strongly affected by environmental factors such as vibrations and depends on the physicalrobustness of their components. Additionally they do not allow random access, have short operational life time, andare susceptible to damage.Several high-speed applications need advanced deflectors like acousto-optic or electro-optic devices. In this paper, theproperties of these two types of scanners will be shortly reviewed. Additionally a newly developed electro-opticdeflector based on a domain inverted prism array in LiNbO3 will be presented.
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