Prof. Heba Yüksel Profile

Prof. Heba Yüksel

Assistant Professor

SPIE Involvement:

Author

Proceedings Article | 29 April 2016 Paper

3D phase stepping optical profilometry using a fiber optic Lloyd's mirror

Gulsen Kosoglu, Heba Yuksel, M. Naci Inci

Proceedings Volume 9896, 989614 (2016) https://doi.org/10.1117/12.2225613

KEYWORDS: Fiber optics, Phase shifts, 3D metrology, Interferometry, Mirrors, Fiber optics tests, Fiber optics, Fringe analysis, Phase shifts, Optical testing, Interferometry, 3D acquisition, 3D image processing, 3D metrology, CCD cameras, Image processing, Prisms, Phase shifting

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Proceedings Article | 18 August 2014 Paper

3D optical profilometry using a fiber optic Lloyd's mirror

Turkay Kart, Gulsen Kosoglu, Heba Yuksel, M. Naci Inci

Proceedings Volume 9204, 920409 (2014) https://doi.org/10.1117/12.2061817

KEYWORDS: Mirrors, Fiber optics, Fringe analysis, Fourier transforms, Fiber optics tests, CCD cameras, Frame grabbers, Projection systems, 3D metrology, Image processing

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Proceedings Article | 25 September 2013 Paper

Geometrical modeling of optical phase difference for analyzing atmospheric turbulence

Demet Yuksel, Heba Yuksel

Proceedings Volume 8874, 88740W (2013) https://doi.org/10.1117/12.2024418

KEYWORDS: Turbulence, Atmospheric propagation, Monte Carlo methods, Atmospheric modeling, Geometrical optics, Atmospheric optics, Refractive index, Optical simulations, Free space optics, Scintillation

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Proceedings Article | 25 September 2013 Paper

Geometrical Monte Carlo simulation of atmospheric turbulence

Demet Yuksel, Heba Yuksel

Proceedings Volume 8874, 88740U (2013) https://doi.org/10.1117/12.2024390

KEYWORDS: Atmospheric propagation, Turbulence, Phase shifts, Monte Carlo methods, Atmospheric modeling, Refractive index, Spherical lenses, Geometrical optics, Laser beam propagation, Atmospheric optics

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Proceedings Article | 24 October 2012 Paper

Optical propagation in a turbulent atmosphere using the split step method

Heba Yuksel, Fulya Kunter

Proceedings Volume 8517, 85170O (2012) https://doi.org/10.1117/12.929598

KEYWORDS: Atmospheric propagation, Atmospheric optics, Wave propagation, Turbulence, Atmospheric turbulence, Radio propagation, Atmospheric modeling, Refractive index, Scintillation, Scattering

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Proceedings Article | 24 October 2012 Paper

Study of strong turbulence effects for optical wireless links

Heba Yuksel, Hasim Meric, Fulya Kunter

Proceedings Volume 8517, 85170I (2012) https://doi.org/10.1117/12.929604

KEYWORDS: Turbulence, Receivers, Scintillation, Atmospheric propagation, Free space optics, Beam propagation method, Telecommunications, Transmitters, Image processing, Telescopes

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Proceedings Article | 24 October 2012 Paper

Turbulence simulation in diverse conditions for FSO Links

Heba Yuksel, Hasim Meric

Proceedings Volume 8517, 85170H (2012) https://doi.org/10.1117/12.929592

KEYWORDS: Turbulence, Atmospheric propagation, Beam propagation method, Computer simulations, Optical simulations, Atmospheric optics, Scintillation, Free space optics, Telecommunications, Near field diffraction

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Proceedings Article | 19 August 2008 Paper

Aperture averaging and correlation function measurements in strong atmospheric turbulence for optical wireless applications

Heba Yuksel, Joseph Harris, Yunxin Tang, Robert Gammon, Christopher Davis

Proceedings Volume 7091, 70910N (2008) https://doi.org/10.1117/12.795054

KEYWORDS: Turbulence, Receivers, Correlation function, Sensors, Free space optics, Atmospheric turbulence, Atmospheric optics, Scintillation, Telescopes, LabVIEW

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The performance of free space optical (FSO) links in a clear atmosphere is affected by the non-ideal characteristics of the communication channel. Atmospheric turbulence causes fluctuations in the received signal level, which increase the bit errors in a digital communication link. In order to quantify performance limitations, a better understanding of the effect of the intensity fluctuations on the received signal at all turbulence levels is needed. Theory reliably describes the behavior in the weak turbulence regime, but theoretical descriptions in the intermediate and strong turbulence regimes are less well developed. We have developed a flexible empirical approach for characterizing link performance in strong turbulence conditions through image analysis of intensity scintillation patterns coupled with frame aperture averaging on an FSO communication link. These measurements are complemented with direct measurements of temporal and spatial correlation functions. A He-Ne laser beam propagates 106 meters in free-space over flat terrain about a meter above the ground to provide strong atmospheric turbulence conditions. A high performance digital camera with a frame-grabbing computer interface is used to capture received laser intensity distributions at rates up to 30 frames per second and various short shutter speeds, down to 1/16,000s per frame. A scintillometer is used for accurate measurements of the turbulence parameter C_n². Laboratory measurements use a local strong turbulence generator, which mimics a strong phase screen. Spatial correlation functions are measured using laterally separated point detectors placed in the receiver plane. Correlations and captured image frames are analyzed in Labview to evaluate correlation functions, C_n², and the aperture averaging factor. The aperture averaging results demonstrate the expected reduction in intensity fluctuations with increasing aperture diameter, and show quantitatively the differences in behavior between various strengths of turbulence. This paper will present accurate empirical data in the strong turbulence regime. Such results can help build upon existing empirical data and lead to the development of new theories.

Proceedings Article | 1 September 2006 Paper

A geometrical optics approach for modeling aperture averaging in free space optical communication applications

Heba Yuksel, Christopher Davis

Proceedings Volume 6303, 630302 (2006) https://doi.org/10.1117/12.679572

KEYWORDS: Turbulence, Receivers, Optical spheres, Monte Carlo methods, Refractive index, Computer simulations, Geometrical optics, Atmospheric propagation, Optical simulations, Atmospheric optics

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Proceedings Article | 1 September 2006 Paper

Aperture averaging analysis and aperture shape invariance of received scintillation in free space optical communication links

Heba Yuksel, Christopher Davis

Proceedings Volume 6304, 63041E (2006) https://doi.org/10.1117/12.679584

KEYWORDS: Turbulence, Receivers, Scintillation, Free space optics, Telescopes, Free space optical communications, Atmospheric turbulence, Shape analysis, Image analysis, Correlation function

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Proceedings Article | 13 September 2005 Paper

Aperture averaging for studies of atmospheric turbulence and optimization of free space optical communication links

Heba Yuksel, Christopher Davis

Proceedings Volume 5892, 58920P (2005) https://doi.org/10.1117/12.615446

KEYWORDS: Turbulence, Receivers, Scintillation, Free space optics, Signal to noise ratio, Atmospheric turbulence, Correlation function, Sensors, Telescopes, Free space optical communications

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Proceedings Article | 18 August 2005 Paper

A geometrical optics approach for modeling atmospheric turbulence

Heba Yuksel, Walid Atia, Christopher Davis

Proceedings Volume 5891, 589109 (2005) https://doi.org/10.1117/12.615522

KEYWORDS: Turbulence, Monte Carlo methods, Optical simulations, Atmospheric modeling, Atmospheric propagation, Refractive index, Interfaces, Laser beam propagation, Geometrical optics, Laser development

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Showing 5 of 12 publications

Conference Committee Involvement (4)

Laser Communication and Propagation through the Atmosphere and Oceans VI

8 August 2017 | San Diego, California, United States

Laser Communication and Propagation through the Atmosphere and Oceans V

30 August 2016 | San Diego, California, United States

Laser Communication and Propagation through the Atmosphere and Oceans IV

10 August 2015 | San Diego, California, United States

Laser Communication and Propagation through the Atmosphere and Oceans III

17 August 2014 | San Diego, California, United States

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