Distinctive roles of elevated absorbing aerosol layers on free-space optical communication systems

Anand, N and Sunilkumar, K and Satheesh, S K and Moorthy, K Krishna (2018) Distinctive roles of elevated absorbing aerosol layers on free-space optical communication systems. In: APPLIED OPTICS, 57 (25). pp. 7152-7158.

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Abstract

The impact of enhanced local heating due to absorption of solar radiation by elevated layers of aerosol black carbon (BC) in the lower troposphere in the performance of free-space optical (FSO) communication links is investigated. It is seen that a strong elevated BC layer at an altitude around 4.5 km enhances the atmospheric stability locally and leads to a large reduction in the atmospheric refractive index structure parameter (C-n(2)) leading to improved performance of the FSO communication links. For layers in the tropical atmosphere with sufficiently high BC concentration, the signal attenuation due to BC absorption is alleviated by the large reduction in C-n(2) due to BC-induced warming and brings down the link outage probability. Synergy between reduction in C-n(2) and long wavelength transmission improves the link budget significantly by reducing the beam wander and number of adaptive optics units required. (C) 2018 Optical Society of America

Item Type:	Journal Article
Publication:	APPLIED OPTICS
Publisher:	OPTICAL SOC AMER
Additional Information:	Copy right for this article belong to OPTICAL SOC AMER, 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Mechanical Sciences > Divecha Centre for Climate Change Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	24 Sep 2018 15:38
Last Modified:	06 Oct 2018 13:53
URI:	http://eprints.iisc.ac.in/id/eprint/60685

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