Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/260

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Institution Author: search.filters.institutionAuthor.Baykal, YahyaSubject: search.filters.subject.Intensity Fluctuations

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  • Conference Object
    Citation - WoS: 3
    Citation - Scopus: 4
    Intensity Fluctuations for Source Arrays in Turbulent Atmosphere - Art. No. 630308
    (Spie-int Soc Optical Engineering, 2006) Baykal, Yahya
    Intensity fluctuations are formulated for source arrays in weakly turbulent horizontal atmospheric links. Source array is composed of point sources separated by variable distances in the transverse source directions. Formula yielding the on-axis scintillation index for the source array is derived by employing the Rytov solution for the structure and correlation functions in the extended Huygens Fresnel principle. Through numerical results, variations of the scintillations versus the array parameters such as the size of the array, spacing between the array elements, amplitudes and phases of the individual sources in the array are investigated. Numerically evaluated intensity fluctuations for such array parameters are compared with the well known single point source scintillations. We are interested to understand whether the use of a source array will give favorable intensity fluctuations in atmospheric communication links.
  • Article
    Citation - WoS: 8
    Citation - Scopus: 8
    Crossbeam Intensity Fluctuations in Turbulence
    (Spie-soc Photo-optical instrumentation Engineers, 2014) Baykal, Yahya
    Intensity fluctuations of a crossbeam are evaluated in weak atmospheric turbulence. A crossbeam is defined as two asymmetrical Gaussian beams oriented perpendicular to each other, and one of these beams is wider along the x-axis whereas the other beam is wider along the y-axis. Our results indicate that in terms of the intensity fluctuations in weak turbulence, focused crossbeams offer favorable results when compared to the corresponding focused Gaussian beam intensity fluctuations. However, for collimated crossbeams, such a comparison is in favor of the collimated Gaussian beam. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)