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Mekatronik Mühendisliği Bölümü

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Browsing Mekatronik Mühendisliği Bölümü by browse.metadata.publisher "Elsevier Sci Ltd"

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    Citation - WoS: 12
    Citation - Scopus: 12
    Averaging of Receiver Aperture for Flat-Topped Incidence
    (Elsevier Sci Ltd, 2013) Kamacioglu, Canan; Baykal, Yahya; Yazgan, Erdem
    Using a flat-topped profile for the incident beam, the power scintillation index for weak atmospheric turbulence is formulated and analytically evaluated. Through the use of the aperture averaging factor, the averaging effect of the finite receiver aperture on the intensity fluctuations for a flat-topped incident beam is examined. The influence of the order of flatness on the averaging is investigated. At large propagation lengths, increasing the flatness parameter decreases the power scintillations and it is possible to further reduce the scintillation by increasing the receiver aperture. Increasing the structure constant increases this effect. (C) 2013 Elsevier Ltd. All rights reserved.
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    Article
    Citation - WoS: 11
    Citation - Scopus: 11
    Generalized Expression for Optical Source Fields
    (Elsevier Sci Ltd, 2012) Kamacioglu, Canan; Baykal, Yahya
    A generalized optical beam expression is developed that presents the majority of the existing optical source fields such as Bessel, Laguerre-Gaussian, dark hollow, bottle, super Gaussian, Lorentz, super-Lorentz, flat-topped, Hermite-sinusoidal-Gaussian, sinusoidal-Gaussian, annular, Gauss-Legendre, vortex, also their higher order modes with their truncated, elegant and elliptical versions. Source intensity profiles derived from the generalized optical source beam fields are checked to match the intensity profiles of many individual known beam types. Source intensities for several interesting beam combinations are presented. Our generalized optical source beam field expression can be used to examine both the source characteristics and the propagation properties of many different optical beams in a single formulation. (C) 2012 Elsevier Ltd. All rights reserved.