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Abstract <p>This work is devoted to the development and experimental verification of effective methods for compensating dynamic atmospheric distortions of a laser beam propagating through a turbulent medium. A&#xa0;laboratory experiment on the correction of wavefront distortions of laser radiation propagating along a turbulent path in a pavilion was performed, where turbulence was simulated using a fan heater supplying warm air perpendicular to the beam propagation. The distortion compensation was performed using an adaptive optics system with a wavefront tilt corrector and a bimorph deformable mirror. The system efficiency was assessed from the analysis of the far-field intensity distribution. We have shown that the generated turbulent distortions are spectrally similar to Kolmogorov turbulence with a bandwidth of about 30 Hz. For effective compensation of wavefront aberrations, the operating frequency of the adaptive optics system should be 20–30 times higher than the turbulence bandwidth. At a system operating frequency of 1 kHz, the beam divergence was reduced to 1.4 of the diffraction limit. Increasing the frequency to 2 kHz and using FPGA, we attained beam stabilization accuracy of 5 μrad. The results of this work can be used to design high-performance systems related to laser radiation propagation in a turbulent medium.</p>

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Compensation of Laser Radiation Wavefront Fluctuations in a Turbulent Medium

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • A. L. Rukosuev,
  • V. A. Bogachev,
  • M. V. Volkov,
  • A. V. Kudryashov,
  • A. N. Nikitin,
  • Yu. V. Sheldakova,
  • F. A. Starikov

摘要

Abstract

This work is devoted to the development and experimental verification of effective methods for compensating dynamic atmospheric distortions of a laser beam propagating through a turbulent medium. A laboratory experiment on the correction of wavefront distortions of laser radiation propagating along a turbulent path in a pavilion was performed, where turbulence was simulated using a fan heater supplying warm air perpendicular to the beam propagation. The distortion compensation was performed using an adaptive optics system with a wavefront tilt corrector and a bimorph deformable mirror. The system efficiency was assessed from the analysis of the far-field intensity distribution. We have shown that the generated turbulent distortions are spectrally similar to Kolmogorov turbulence with a bandwidth of about 30 Hz. For effective compensation of wavefront aberrations, the operating frequency of the adaptive optics system should be 20–30 times higher than the turbulence bandwidth. At a system operating frequency of 1 kHz, the beam divergence was reduced to 1.4 of the diffraction limit. Increasing the frequency to 2 kHz and using FPGA, we attained beam stabilization accuracy of 5 μrad. The results of this work can be used to design high-performance systems related to laser radiation propagation in a turbulent medium.