Dual-loop adaptive optical system for compensation of the low- and high-order wavefront aberrations

This paper presents consecutive correction of the low- and high-order wavefront aberrations. To compensate for large-scale phase distortions bimorph deformable mirror was used with aperture 50 mm and 28 electrodes. The mitigation of the small-scale distortions was performed with 78-mm and 55 actuators wavefront corrector of the piezostack type. To investigate behavior of the laser beam two Shack-Hartmann wavefront sensors and far-field camera were used.