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Konu "Turbulent Atmosphere" için Mühendislik Fakültesi listeleme

Konu "Turbulent Atmosphere" için Mühendislik Fakültesi listeleme

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  • Area scintillations of Bessel Gaussian and modified Bessel Gaussian beams of zeroth order 
    Eyyuboğlu, Halil T. (Springer, 2010-01)
    As an extension of our previous study, the area scintillation aspects of Bessel Gaussian and modified Bessel Gaussian beams of zeroth order are investigated. The analysis is carried out on the basis of equal source sizes ...
  • Beam wander characteristics of cos and cosh-Gaussian beams 
    Çil, Celal Zaim; Eyyuboğlu, Halil T.; Baykal, Yahya; Cai, Yangjian (Springer, 2009-06)
    Within the context of a general beam formulation, beam wander characteristics of cos and cosh-Gaussian beams are derived and numerically evaluated. In our graphs, the fundamental Gaussian beam is used as a benchmark for ...
  • Calculation of average intensity via semi-analytic method 
    Eyyuboğlu, Halil T.; Sermutlu, Emre (Springer, 2010-03)
    We present a semi-analytic approach to the solution of the quadruple Huygens-Fresnel integral which is used to calculate the average receiver intensity of a source beam after it has propagated in a turbulent atmosphere. ...
  • Changes of the centroid position of laser beams propagating through an optical system in turbulent atmosphere 
    Ji, Xiaoling; Baykal, Yahya; Jia, Xinhong (Elsevier Science Ltd, 2013-12-30)
    In this paper, the effects of atmospheric turbulence, initial field amplitude, optical system and thermal blooming on the centroid position of laser beams propagating through the atmosphere are studied in detail. With the ...
  • Comparison of wave structure functions for intensity profiles 
    Eyyuboğlu, Halil T. (Springer, 2009-03)
    We give a list of available wave structure functions (WSFs) of a spherical wave, simultaneously providing some derivation details. The aim is to assess the impact of these WSFs on intensity profiles of various beams ...
  • Concept of area scintillation 
    Eyyuboğlu, Halil T. (Springer, 2009-08)
    Stemming from the results of our earlier investigations, the concept of area scintillation is introduced, which takes into account the intensity distribution over the receiver plane. In this context, the area scintillation ...
  • Cross beam scintillations in non-Kolmogorov medium 
    Baykal, Yahya (Optical Soc Amer, 2014-10)
    For the collimated and focused cross beams, the on-axis scintillation index is evaluated when these beams propagate in weak non-Kolmogorov turbulence. In the limiting cases, our solution correctly reduces to the known ...
  • Evolution of the degree of polarization of an electromagnetic Gaussian Schell-model. beam in a Gaussian cavity 
    Yao, Min; Cai, Yangjian; Eyyuboğlu, Halil T.; Baykal, Yahya; Korotkova, Olga (Optical Soc Amer, 2008-10-01)
    The interaction of an electromagnetic Gaussian Schell-model (EGSM) beam with a Gaussian cavity is analyzed. In particular, the evolution of the degree of polarization of the EGSM beam is investigated. The results show that ...
  • Hypergeometric Gaussian beam and its propagation in turbulence 
    Eyyuboğlu, Halil T.; Cai, Yangjian (Elsevier Science Bv, 2012-10-01)
    We study propagation characteristics of hypergeometric Gaussian beam in turbulence. In this context, we formulate the receiver plane intensity using extended Huygens-Fresnel integral. From the graphical results, it is seen ...
  • Partially coherent Lorentz Gaussian beam and its scintillations 
    Eyyuboğlu, Halil T. (Springer, 2011-06)
    We study the scintillation aspects of partially coherent Lorentz Gaussian (LG) beams via numerically integrating the average and average squared intensity expressions. Within the examined range of input and propagation ...
  • Propagation and coherence properties of higher order partially coherent dark hollow beams in turbulence 
    Eyyuboğlu, Halil T. (Elsevier Science Ltd, 2008-02)
    We formulate and evaluate in terms of graphical outputs, source and receiver plane expressions, the complex degree of coherence, beam size variation and power in bucket performance for higher order partially coherent dark ...
  • Propagation factors of Hermite-Gaussian beams in turbulent atmosphere 
    Yuan, Yangsheng; Cai, Yangjian; Qu, Jun; Eyyuboğlu, Halil T.; Baykal, Yahya (Elsevier Science Ltd, 2010-11)
    Based on the extended Huygens-Fresnel integral and the second-order moments of the Wigner distribution function, an analytical formulae for the propagation factors (M-2-factors) of coherent and partially coherent one-dimensional ...
  • Propagation factors of laser array beams in turbulent atmosphere 
    Yuan, Yangsheng; Cai, Yangjian; Zhao, Chengliang; Eyyuboğlu, Halil T.; Baykal, Yahya (Taylor&Francis Ltd, 2010)
    The propagation factors of phased locked laser array beams of radial and rectangular symmetries in a turbulent atmosphere are investigated based on the extended Huygens-Fresnel integral and the Wigner distribution function. ...
  • Propagation of Elegant Higher-Order Gaussian Beams In Turbulent Atmosphere 
    Wang, Fei; Cai, Yangjian; Eyyuboğlu, Halil T.; Baykal, Yahya (Spie-Int Soc Optical Engineering, 2010)
    Propagation of elegant higher-order Gaussian beams in turbulent atmosphere is studied in detail. Analytical propagation formulae of elegant higher-order Gaussian beams in turbulent atmosphere are derived based on extended ...
  • Propagation of optical flat-topped gaussian beams in satellite links 
    Kamacıoğlu, Canan; Altay Arpalı, Serap; Baykal, Yahya; Yazgan, Erdem (IEEE, 2009)
    Propagation of optical flat-topped Gaussian beams in earth-satellite optical communication links is investigated where part of the link is turbulent atmosphere. Flat-topped Gaussian source field is obtained by superposing ...
  • Propagation of partially coherent beams after a source plane ring aperture 
    Eyyuboğlu, Halil T.; Baykal, Yahya; Cai, Y. (Electromagnetics Acad, 2008)
    The propagation properties of partially coherent beams passing through a source placed ring aperture are examined. The derivation is based on the lowest order general beam formulation, such that our results are applicable ...
  • Propagation of various dark hollow beams through an optical system in turbulent atmosphere 
    Cai, Yangjian; Eyyuboğlu, Halil T.; Baykal, Yahya (Elsevier Science, 2010-10)
    The propagation of a dark hollow beam (DHB) of circular, elliptical or rectangular symmetry through aligned and misaligned ABCD optical systems in turbulent atmosphere is investigated. Analytical propagation formulae for ...
  • Radius of curvature of Bessel and modified Bessel Gaussian beams 
    Eyyuboğlu, Halil T.; Ji, Xiaoling (Elsevier Science Bv, 2013-07-01)
    We analyze the radius of curvature of Bessel Gaussian (BG) and modified Bessel Gaussian (mBG) beams. The study is based on the results of analytic derivation as well as those of the random phase screen approach. Our results ...
  • Scintillation advantages of lowest order Bessel-Gaussian beams 
    Eyyuboğlu, Halil T.; Baykal, Yahya; Sermutlu, Emre (Springer, 2008-08)
    For a weak turbulence propagation environment, the scintillation index of the lowest order Bessel-Gaussian beams is formulated. Its triple and single integral versions are presented. Numerical evaluations show that at large ...
  • Scintillation characteristics of cosh-Gaussian beams 
    Eyyuboğlu, Halil T.; Baykal, Yahya (Optical Soc Amer, 2007-03-01)
    By using the generalized beam formulation, the scintillation index is derived and evaluated for cosh-Gaussian beams in a turbulent atmosphere. Comparisons are made to cos-Gaussian and Gaussian beam scintillations. The ...