Kannan, A.Bhavana, V.Younus, S.M.Rehaman, S.M.Krishnan, P.2026-02-042024Wireless Personal Communications, 2024, 134, 1, pp. 69-939296212https://doi.org/10.1007/s11277-024-10887-whttps://idr.nitk.ac.in/handle/123456789/21448This research paper presents the development and implementation of a real-time communication system that utilizes LEDs for transmitting text, image, and audio through Free Space Optical Communication (FSOC) and Underwater Wireless Optical Communication (UWOC) channels. The impact of atmospheric and oceanic attenuation and turbulences are considered for the performance analysis of the proposed system. The various atmospheric weather conditions like light fog, dense fog, and heavy rain are considered for FSOC while in the case of UWOC, effects like pure water, and seawater with turbulence and without turbulence are considered. The outcomes of the experiments and simulations, including quality factors, eye diagrams, and bit error rates, are plotted and discussed in the results. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.Atmospheric thermodynamicsOptical communicationTurbulenceUnderwater acousticsUnderwater optical wireless communicationBit-error rateDemonstration analysisExperimental demonstrationsFree Space Optical communicationFree spacesOptical wireless communication systemsPerformances analysisReal-time communication systemResearch papersUnderwater wireless optical communicationsBit error rate