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4 October 2024 Impact of speckle-beacon size on wavefront sensing and adaptive optics control in volume turbulence
Svetlana L. Lachinova, Mikhail A. Vorontsov, Ernst E. Polnau
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Proceedings Volume PC13149, Unconventional Imaging, Sensing, and Adaptive Optics 2024; PC131490A (2024) https://doi.org/10.1117/12.3027494
Event: Optical Engineering + Applications, 2024, San Diego, California, United States
Abstract
A wave-optics-based numerical simulation analysis of the impact of speckle-beacon size on the performance of an adaptive optics (AO) system operating in volume atmospheric turbulence is presented. For clarity, the speckle beacon was represented by a laser beam of a super-Gaussian profile, scattered off an extended flat target with Lambertian surface roughness. The control loop of the AO system included a high-resolution scintillation-resistant multi-aperture phase contrast wavefront sensor (MAPCO WFS), an ideal (infinite-resolution) wavefront corrector, and phase-conjugation (PC) type controllers utilizing either conventional PC or advanced speckle-average (SA) PC control algorithms. The results obtained show that the use of the advanced control algorithms makes it possible to partially mitigate the target-induced speckle effects and turbulence-induced wavefront aberrations for extended beacons, the size of which is comparable to or even exceeds the diffraction-limited beam spot size of the corresponding laser beam projection system.
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Svetlana L. Lachinova, Mikhail A. Vorontsov, and Ernst E. Polnau "Impact of speckle-beacon size on wavefront sensing and adaptive optics control in volume turbulence", Proc. SPIE PC13149, Unconventional Imaging, Sensing, and Adaptive Optics 2024, PC131490A (4 October 2024); https://doi.org/10.1117/12.3027494
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KEYWORDS
Adaptive optics
Wavefront sensors
Adaptive control
Turbulence
Control systems
Detection and tracking algorithms
Speckle
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