Optical EngineeringLaser beam direction stabilization by means of Bragg diffraction
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An acousto-optic system with optoelectronic feedback providing laser beam direction stabilization is studied. Different modifications of the system based on isotropic and anisotropic diffraction of light are considered. Influence of acousto-optic selectivity on the operating angular range and the stabilization coefficient is analyzed in detail. Results of experimental investigation of the system based on a paratellurite crystal cell are presented as well.