Effect of path length on the  saturation level of radiation fluctuations of a narrow divergent laser beam in the surface atmosphere at snowfalls in non-point receiver

N. A. Vostretsov

doi:10.1117/12.2504433

13 December 2018 Effect of path length on the saturation level of radiation fluctuations of a narrow divergent laser beam in the surface atmosphere at snowfalls in non-point receiver

N. A. Vostretsov

Author Affiliations +

Proceedings Volume 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 108331Y (2018) https://doi.org/10.1117/12.2504433
Event: XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2018, Tomsk, Russian Federation

Abstract

Measurements of the radiation fluctuations of a narrow diverging laser beam on 260 (2x130), 520 (4×130), and 780 (6x130) m in the surface atmosphere in snowfalls are carried out. The wavelength is λ = 0.63 μm. The receiver was installed on the optical axis of the beam. The diameter of the receiver was 0.8, 3.1 and 25 mm. It is established that the fluctuations in the radiation of a laser beam increase with the volume scattering coefficient first, and then do not increase (saturate) and decrease (on a 780 m long path). The level of fluctuations and the saturation value increase with the length of the path at a maximum snowflake size of 1 −3 mm with a receiver diameter of 0.8 and 3.1 mm.

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N. A. Vostretsov "Effect of path length on the saturation level of radiation fluctuations of a narrow divergent laser beam in the surface atmosphere at snowfalls in non-point receiver", Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 108331Y (13 December 2018); https://doi.org/10.1117/12.2504433

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