Abstract. Thermo-optical inhomogeneities in active element of solid-state laser responsible for thermal stress and deformation as well as disturbances in generated radiation are studied. It is proposed to compensate for linear distortion by means of variations in angular and spatial position of opaque mirror in the laser cavity with electro-optical direction regulator. A special feature of the regulator is application of a device designed for control over the mirror position. The device contains a hinged elastic beam with a console bearing the cavity mirror; the beam deformation is performed by a differential screw device of linear movement. Application of the elastic beam makes it possible to correct simultaneously angular and linear position of the mirror with the use of a single transfer origin. An algorithm is developed for the control over the electro-optical direction regulator.

Keywords: solid-state laser, thermo-optical distortions, laser cavity, thermal stress, control algorithm

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