Wavefront correction of laser beam distorted by fan heater turbulence using an adaptive optical system with a frequency of 2000 Hz

A. L. Rukosuev; V. N. Belousov; A. N. Nikitin; Yu. V. Sheldakova; A. V. Kudryashov; V. A. Bogachev; M. V. Volkov; S. G. Garanin; F. A. Starikov

doi:10.1117/12.2578143

5 March 2021 Wavefront correction of laser beam distorted by fan heater turbulence using an adaptive optical system with a frequency of 2000 Hz

A. L. Rukosuev, V. N. Belousov, A. N. Nikitin, Yu. V. Sheldakova, A. V. Kudryashov, V. A. Bogachev, M. V. Volkov, S. G. Garanin, F. A. Starikov

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Proceedings Volume 11678, Free-Space Laser Communications XXXIII; 116780P (2021) https://doi.org/10.1117/12.2578143
Event: SPIE LASE, 2021, Online Only

Abstract

The results of experiments conducted on a laboratory setup of a fast adaptive optical system based on the use of FPGA as the main control element and a bimorph mirror as a wavefront corrector are presented. The adaptive system bandwidth ranged from a dozen Hertz to 2,000 Hertz. For independent control of the quality of correction the intensity distribution in the far field was recorded. It is shown that for a good correction of the wavefront the system bandwidth should be an order of magnitude higher than the upper boundary of the spectrum of wavefront distortions caused by turbulence. A comparison of the model and experimental data is also presented.

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A. L. Rukosuev, V. N. Belousov, A. N. Nikitin, Yu. V. Sheldakova, A. V. Kudryashov, V. A. Bogachev, M. V. Volkov, S. G. Garanin, and F. A. Starikov "Wavefront correction of laser beam distorted by fan heater turbulence using an adaptive optical system with a frequency of 2000 Hz", Proc. SPIE 11678, Free-Space Laser Communications XXXIII, 116780P (5 March 2021); https://doi.org/10.1117/12.2578143

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