International Physics Conference.St. Petersburg, October 21-25, 2024, St. Petersburg
Laser physics and laser optics

Correction of large- and small-scale wavefront aberrations in dual-loop adaptive optical system

V. V. Toporovsky^ab, I. V. Galaktionov^ab, A. N. Nikitin^a, V. V. Samarkin^a, A. V. Kudryashov<sup>a

a</sup> Institute of Dynamics of Geospheres, Russian Academy of Sciences, Moscow, Russia
^b Moscow Technical University of Communications and Informatics, Moscow, Russia

Abstract: An adaptive optical system with the ability to sequentially correct large- and small-scale wavefront aberrations is presented. Artificial turbulence on a laboratory bench was simulated with a fan heater. A 50 mm bimorph deformable mirror with 28 control elements to compensate for low-order phase fluctuations (defocus, astigmatism, coma, spherical aberration) and a stacked-actuator piezoelectric deformable mirror with an aperture of 78 mm and 55 actuators to suppress the influence of high-order phase fluctuations were used as wavefront correctors. Two Shack–Hartmann wavefront sensors were used to analyze the wavefront characteristics and provide closed-loop control.

Keywords: piezoelectric wavefront correctors, bimorph deformable mirror, piezoactuator deformable mirror, shack-hartmann wavefront sensor.

Received: 04.05.2024
Revised: 04.05.2024
Accepted: 30.10.2024

DOI: 10.61011/OS.2024.12.59796.6631-24

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