Saturation of radiation fluctuations of a narrow divergent laser beam in the surface atmosphere in snowfalls

N. A. Vostretsov

doi:10.1117/12.2574885

12 November 2020 Saturation of radiation fluctuations of a narrow divergent laser beam in the surface atmosphere in snowfalls

N. A. Vostretsov

Author Affiliations +

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 115600Y (2020) https://doi.org/10.1117/12.2574885
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

Measurements of the radiation fluctuations of a narrow divergent laser beam on 10 (ten) paths were made: 37, 130, 260 (2x130), 390 (3x130), 520 (4x130), 650 (5x130), 780 (6x130), 964, 1928 and 2048 m in the surface atmosphere in snowfalls. The wavelength is λ = 0.63 μm. The receiver was installed on the optical axis of the beam. The diameter of the receiver was 0.1 or 0.3, 0.8, 3.1 and 25 mm. It is established that the fluctuations the radiation of a laser beam increase with an scattering coefficient initially increase, and then do not increase (saturate) and decrease (on a 780 m path length for the diameter of the receiver 0.8 mm). In measurements with a receiver diameter of 0.1 or 0.3 mm, the saturation value is not determined as a function of the path length. With receiver diameters of 0.8 and 3.1 mm saturation value increases with the length of the path.

Citation Download Citation

N. A. Vostretsov "Saturation of radiation fluctuations of a narrow divergent laser beam in the surface atmosphere in snowfalls", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115600Y (12 November 2020); https://doi.org/10.1117/12.2574885

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