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- Yahya Baykal, Halil T Eyyuboğlu
- Applied optics
- 2006

The scintillation index is formulated for a flat-topped Gaussian beam source in atmospheric turbulence. The variations of the on-axis scintillations at the receiver plane are evaluated versus the link length, the size of the flat-topped Gaussian source, and the wavelength at selected flatness scales. The existing source model that represents the flat-topped… (More)

- Halil Tanyer Eyyuboğlu, Yahya Baykal
- Journal of the Optical Society of America. A…
- 2005

Hermite-sine-Gaussian and Hermite-sinh-Gaussian laser beam intensities in a turbulent atmosphere are investigated. The received intensity is formulated by applying the extended Huygens-Fresnel principle to generalized Hermite-hyperbolic-Gaussian and Hermite-sinusoidal-Gaussian beam incidences. From this result, the association to different types of… (More)

- Chengliang Zhao, Yangjian Cai, Xuanhui Lu, Halil T Eyyuboğlu
- Optics express
- 2009

Propagations of coherent and partially coherent flat-topped beams through a focusing optical system are formulated. The radiation force on a Rayleigh dielectric sphere induced by focused coherent and partially coherent flat-topped beams is investigated theoretically. It is found that we can increase the transverse trapping range at the planes near the focal… (More)

- Halil T Eyyuboğlu, Yahya Baykal, Emre Sermutlu, Olga Korotkova, Yangjian Cai
- Journal of the Optical Society of America. A…
- 2009

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 modified Bessel-Gaussian beams of higher than zero order scintillate less than Gaussian beams at large input beam sizes and low beam… (More)

- Xiaoling Ji, Halil T Eyyuboğlu, Yahya Baykal
- Optics express
- 2010

The analytical formula for the effective radius of curvature of radial Gaussian array beams propagating through atmospheric turbulence is derived, where coherent and incoherent beam combinations are considered. The influence of turbulence on the effective radius of curvature of radial Gaussian array beams is studied by using numerical calculation examples.

- Serap Altay Arpali, Halil T Eyyuboğlu, Yahya Baykal
- Applied optics
- 2008

In order to analyze the effect of beam type on free space optical communication systems, bit error rate (BER) values versus signal-to-noise ratio (SNR) are calculated for zero order and higher order general beam types, namely for Gaussian, cos-Gaussian, cosh-Gaussian, and annular beams. BER analysis is based on optical scintillation using log-normal… (More)

- Caglar Arpali, Canan Yazicioglu, Halil T Eyyuboglu, Serap A Arpali, Yahya Baykal
- Optics express
- 2006

A simulator is designed in MATLAB code which gives the propagation characteristics of a general-type beam in turbulent atmosphere. When the required source and medium parameters are entered, the simulator yields the average intensity profile along the propagation axis in a video format. In our simulator, the user can choose the option of a "user defined… (More)

- Olga Korotkova, Min Yao, Yangjian Cai, Halil T Eyyuboğlu, Yahya Baykal
- Journal of the Optical Society of America. A…
- 2008

On the basis of the unified theory of coherence and polarization, we investigate the behavior of the state of polarization of a stochastic electromagnetic beam in a Gaussian cavity. Formulations both in terms of Stokes parameters and in terms of polarization ellipse are given. We show that the state of polarization stabilizes, except in the case of a… (More)

- Yangjian Cai, Olga Korotkova, Halil T Eyyuboğlu, Yahya Baykal
- Optics express
- 2008

Propagation of stochastic electromagnetic beams through paraxial ABCD optical systems operating through turbulent atmosphere is investigated with the help of the ABCD matrices and the generalized Huygens-Fresnel integral. In particular, the analytic formula is derived for the cross-spectral density matrix of an electromagnetic Gaussian Schell-model (EGSM)… (More)

- Yangjian Cai, Yuntian Chen, Halil T Eyyuboğlu, Yahya Baykal
- Optics letters
- 2007

A tensor method is used to formulate the on-axis scintillation index for an elliptical Gaussian beam (EGB; astigmatic Gaussian beam) propagating in a weak turbulent atmosphere. Variations of the on-axis scintillation of an EGB are studied. It is interesting to find that the scintillation index of an EGB can be smaller than that of a circular Gaussian beam… (More)