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Enhanced optical pulse broadening in free-space optical links due to the radiative effects of atmospheric aerosols

Sunilkumar, K and Anand, N and Satheesh, SK and Krishna Moorthy, K and Ilavazhagan, G (2021) Enhanced optical pulse broadening in free-space optical links due to the radiative effects of atmospheric aerosols. In: Optics Express, 29 (2). pp. 865-876.

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Official URL: https://doi.org/10.1364/OE.409794


Propagation through turbulent media produces complex amplitude fluctuations and temporal spreading of narrow optical pulses. Light-absorbing aerosols present in the atmospheric transmission path will perturb the refractive index structure parameter (C2n) through atmospheric heating. The consequent enhancement in broadening and attenuation of ultrashort (femtosecond) optical pulses has been calculated by combining multi-satellite observations, radiosonde profiles and computational radiative transfer. It is shown that narrower optical pulses are more vulnerable to aerosol-induced impairments while broader pulses are more resilient, notwithstanding three to four orders of enhanced optical scintillation. © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Item Type: Journal Article
Publication: Optics Express
Publisher: OSA - The Optical Society
Additional Information: The copyright for this article belongs to Authors
Keywords: Atmospheric structure; Atmospheric thermodynamics; Laser pulses; Refractive index; Ultrafast lasers, Atmospheric heating; Atmospheric transmissions; Free-space optical link; Light absorbing aerosols; Multi-satellite observations; Optical scintillation; Refractive index structure parameter; Temporal spreading, Atmospheric aerosols
Department/Centre: Division of Mechanical Sciences > Divecha Centre for Climate Change
Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 21 Sep 2021 09:30
Last Modified: 21 Sep 2021 09:30
URI: http://eprints.iisc.ac.in/id/eprint/67797

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