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Konu "Annular Beams" için Elektronik ve Haberleşme Mühendisliği Bölümü listeleme

Konu "Annular Beams" için Elektronik ve Haberleşme Mühendisliği Bölümü 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 ...
  • Ber of Annular Beams in Strong Turbulence 
    Gerçekçioğlu, Hamza; Baykal, Yahya; Eyyuboğlu, Halil T. (2010)
    Bit error rate (BER) of annular beams is found in strong turbulence. Examining effects of beam and medium parameters on BER reveals that annular beams become favorable in stronger turbulence and at smaller focal lengths.
  • 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 ...
  • Field correlations of annular beams in extremely strong turbulence 
    Baykal, Yahya; Cai, Yangjian; Ji, Xiaoling (Elsevier Science Bv, 2012-10-01)
    The field correlations of annular beams are formulated when the atmosphere assumes extremely strong turbulence. Thicker and larger ring sized annular beams are found to exhibit larger absolute field correlations. For the ...
  • Field correlations of flat-topped Gaussian and annular beams in turbulence 
    Baykal, Yahya (Elsevier Science Ltd, 2011-05)
    Starting from the second order moment formulation for multi-beam incidence, field correlations at the receiver plane of flat-topped Gaussian and annular beams are found in turbulence. Reflecting the information on both the ...
  • Incoherent sinusoidal-Gaussian and annular beam scintillations 
    Baykal, Yahya; Eyyuboğlu, Halil T.; Cai, Yangjian (Spie-Int Soc Optical Engineering, 2008)
    The scintillation index is evaluated in horizontal turbulent atmospheric optical links for incidences of incoherent cosh-Gaussian (IChG), cos-Gaussian (ICG) and annular (IA) beams. Weak turbulence solution is obtained for ...
  • Intensity fluctuations of partially coherent laser beam arrays in weak atmospheric turbulence 
    Arpalı, Çağlar; Altay Arpalı, Serap; Baykal, Yahya; Eyyuboğlu, Halil T. (Springer, 2011-04)
    The intensity fluctuation of a partially coherent laser beam array is examined. For this purpose, the on-axis scintillation index at the receiver plane is analytically formulated via the extended Huygens-Fresnel diffraction ...
  • Off-axis Field Correlations in Turbulence 
    Baykal, Yahya (IEEE, 2013)
    The field correlations in atmospheric turbulence are evaluated for off-axis optical incidence. Within the practical range of the source and the medium parameters, increase in the diagonal length at the receiver plane is ...
  • 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 ...
  • 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 calculations for partially coherent general beams via extended Huygens-Fresnel integral and self-designed Matlab function 
    Eyyuboğlu, Halil T.; Baykal, Yahya; Cai, Y. (Springer, 2010-09)
    We present scintillation calculations in weak atmospheric turbulence for partially coherent general beams based on the extended Huygens-Fresnel integral and a Matlab function designed to handle expressions both of the ...
  • Scintillation index of modified Bessel-Gaussian beams propagating in turbulent media 
    Eyyuboğlu, Halil T.; Baykal, Yahya; Sermutlu, Emre; Korotkova, Olga; Cai, Yangjian (Optical Soc Amer, 2009-02)
    The scintillation index is formulated for modified Bessel-Gaussian beams propagating in weakly turbulent media. Numerical calculations applied directly to the derived triple integral show that, for off-axis positions, the ...
  • Scintillations of Laguerre Gaussian beams 
    Eyyuboğlu, Halil T.; Baykal, Yahya; Ji, X. (Springer, 2010-03)
    By using the Rytov method, we formulate and numerically evaluate the scintillations of Laguerre Gaussian beams in weak atmospheric turbulence. Our results indicate that at on-axis positions, Laguerre Gaussian beams with ...
  • Scintillations of partially coherent multiple Gaussian beams in turbulence 
    Baykal, Yahya; Eyyuboğlu, Halil T.; Cai, Yangjian (Optical Soc Amer, 2009-04-01)
    For an incidence composed of partially coherent multiple Gaussian beams, Huygens-Fresnel principle-based on-axis scintillation index is formulated in a weakly turbulent homogeneous horizontal atmospheric path. Our general ...