Baykal, YahyaAta, YalcinGokce, Muhsin Caner06.02. Elektronik ve Haberleşme Mühendisliği06.03. Elektrik-Elektronik Mühendisliği06. Mühendislik Fakültesi01. Çankaya Üniversitesi2023-11-302025-09-182023-11-302025-09-182023Gökçe, Muhsin Caner. Baykal, Yahya; Ata, Yalçın. (2023). "Coupling efficiency of multimode beam to fiber in atmospheric turbulence", Journal of Quantitative Spectroscopy and Radiative Transfer, Vol.303.0022-40731879-1352https://doi.org/10.1016/j.jqsrt.2023.108590https://hdl.handle.net/20.500.12416/14564Gokce, Muhsin Caner/0000-0003-4465-1983Atmospheric turbulence causes wavefront distortions in the propagated laser beam. By the beam shaping of the transmitted laser, wavefront distortions can be mitigated effectively. In this paper, we consider a shaped laser modeled by multimode beams at the transmitter and investigate the coupling of the light wave to a single-mode fiber under the atmospheric turbulence effect. We derive the light power on the coupling lens and light power accepted by the fiber core using the extended Huygens-Fresnel princi-ple. Then, the fiber coupling efficiency (FCE) is scrutinized for different system parameters such as the number of modes of the transmit laser, link distance, structure constant of atmosphere, focal length and radius of the coupling lens, wavelength, source size, and the number of speckles (NOS).(c) 2023 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccessOptical Wireless CommunicationOptical Wave PropagationMultimode BeamFiber OpticsSingle -Mode FiberFiber Coupling EfficiencyArticle10.1016/j.jqsrt.2023.1085902-s2.0-85150873949