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10 May 2023 Study on laser transmission characteristics of atmospheric turbulence disturbed by acoustic waves
Mingjun Wang, Yongjun Li
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Proceedings Volume 12554, AOPC 2022: Advanced Laser Technology and Applications; 1255414 (2023) https://doi.org/10.1117/12.2651878
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China
Abstract
When laser propagates in the atmosphere, due to the influence of atmospheric turbulence, it will produce spot drift, light intensity flicker, beam spread and other phenomena, which restrict the development of laser engineering. Acoustic wave is a mechanical wave, when it propagates in the atmosphere, it will change the atmospheric density, affect the internal structure of atmospheric turbulence, and then affect the transmission of laser in atmospheric turbulence. In this paper, a coherent acoustic wave generator is designed, and the laser transmission experiment in the outdoor atmospheric turbulence environment disturbed by coherent acoustic waves is carried out. The variations of the beam drift fluctuation variance, scintillation index and beam diameter with coherent acoustic wave frequency and acoustic pressure level are studied. The results show that coherent acoustic waves will change the original structure of atmospheric turbulence and affect the variance of beam drift fluctuation, scintillation index and beam diameter when laser transmitted in atmospheric turbulence; The variance of beam drift fluctuation, scintillation index and beam diameter change with the change of sound source frequency and acoustic pressure level. This paper preliminarily explores the influence of acoustic wave disturbing atmospheric turbulence on laser transmission characteristics, and the research results provide a new idea for improving or interfering laser transmission characteristics in atmospheric turbulence.
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Mingjun Wang and Yongjun Li "Study on laser transmission characteristics of atmospheric turbulence disturbed by acoustic waves", Proc. SPIE 12554, AOPC 2022: Advanced Laser Technology and Applications, 1255414 (10 May 2023); https://doi.org/10.1117/12.2651878
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KEYWORDS
Acoustics
Atmospheric turbulence
Scintillation
Atmospheric optics
Atmospheric propagation engineering
Refractive index
Turbulence
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