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Off-axis average transmittance and beam spread of a partially coherent flat-topped beam in a turbulent underwater medium

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dc.contributor.author Keskin, Aysan
dc.contributor.author Baykal, Yahya
dc.date.accessioned 2020-02-12T07:12:06Z
dc.date.available 2020-02-12T07:12:06Z
dc.date.issued 2019-08-01
dc.identifier.citation Keskin, Aysan; Baykal, Yahya, "Off-axis average transmittance and beam spread of a partially coherent flat-topped beam in a turbulent underwater medium", Journal of the Optical Society of America A-Optics Image Science and Vision, Vol. 36, No. 8, pp. 1287-1294, (2019). tr_TR
dc.identifier.issn 1084-7529
dc.identifier.uri http://hdl.handle.net/20.500.12416/2426
dc.description.abstract The effects of oceanic turbulence on the off-axis optical transmittance and beam spread are examined when a partially coherent flat-topped beam wave propagates in an underwater medium. To observe the oceanic turbulence effect, the power spectrum of homogeneous and isotropic oceanic water combining the effects of salinity and temperature is used. Employing the extended Huygens-Fresnel integral and Carter's definition for the general beam formulation that is applied to a partially coherent flat-topped beam, the effects of the parameters of power spectrum, the link on the off-axis average transmittance, and beam spread are analyzed. The results obtained with the help of the MATLAB program indicate that if the flatness of the optical beam increases, the average transmittance increases, and the beam spread decreases. Partial coherence is found to be inversely proportional to the average transmittance and directly proportional to beam spread. Increase in the source size is found to increase the average transmittance and to reduce the beam spread. Loss of the kinetic energy of fluid causes less turbulence. The rate of dissipation of kinetic energy per unit mass of fluid is directly proportional to the average transmittance, while it is inversely proportional to the beam spread. The rate of dissipation of the mean square temperature is inversely proportional to the average transmittance and directly proportional to the beam spread. When the temperature-induced optical turbulence is dominant, the average transmittance almost never decreases. However, the salinity-induced optical turbulence sharply reduces the average transmittance and increases the beam spread of the partially coherent flat-topped beam in underwater turbulence. When the off-axis parameter becomes larger, average transmittance decreases. (C) 2019 Optical Society of America tr_TR
dc.language.iso eng tr_TR
dc.publisher Optical Soc Amer tr_TR
dc.relation.isversionof 10.1364/JOSAA.36.001287 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Bit Error Rate tr_TR
dc.subject Array Laser-Beam tr_TR
dc.subject Intensity Fluctuations tr_TR
dc.subject Gaussian-Beam tr_TR
dc.subject Propagation Behavior tr_TR
dc.subject Scintillation Index tr_TR
dc.subject Optical Beams tr_TR
dc.subject Anisotropy tr_TR
dc.subject Wave tr_TR
dc.subject Ber tr_TR
dc.title Off-axis average transmittance and beam spread of a partially coherent flat-topped beam in a turbulent underwater medium tr_TR
dc.type article tr_TR
dc.relation.journal Journal of the Optical Society of America A-Optics Image Science and Vision tr_TR
dc.contributor.authorID 7812 tr_TR
dc.identifier.volume 36 tr_TR
dc.identifier.issue 8 tr_TR
dc.identifier.startpage 1287 tr_TR
dc.identifier.endpage 1294 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Elektrik Elektronik Mühendisliği Bölümü tr_TR


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