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Beam Propagation Through Atmospheric Turbulence Using an Altitude-Dependent Structure Profile with Non-Uniformly Distributed Phase ScreensModeling the effects of atmospheric turbulence on optical beam propagation is a key element in the design and analysis of free-space optical communication systems. Numerical wave optics simulations provide a particularly useful technique for understanding the degradation of the optical field in the receiver plane when the analytical theory is insufficient for characterizing the atmospheric channel. Motivated by such an application, we use a split-step method modeling the turbulence along the propagation path as a series of thin random phase screens with modified von Karman refractive index statistics using the Hufnagel-Valley turbulence profile to determine the effective structure constant for each screen. In this work, we employ a space-to-ground case study to examine the irradiance and phase statistics for both uniformly and non-uniformly spaced screens along the propagation path and compare to analytical results. We find that better agreement with the analytical theory is obtained using a non-uniform spacing with the effective structure constant for each screen chosen to minimize its contribution to the scintillation in the receiver plane. We evaluate this method as a flexible alternative to other standard layered models used in astronomical imaging applications.
Document ID
Document Type
Conference Paper
Chahine, Yousef K.
(NASA Glenn Research Center Cleveland, OH, United States)
Tedder, Sarah A.
(NASA Glenn Research Center Cleveland, OH, United States)
Vyhnalek, Brian E.
(NASA Glenn Research Center Cleveland, OH, United States)
Wroblewski, Adam C.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
February 24, 2020
Publication Date
February 20, 2020
Subject Category
Report/Patent Number
Meeting Information
Meeting: SPIE Photonics West
Location: San Francisco, CA
Country: United States
Start Date: February 2, 2020
End Date: February 6, 2020
Sponsors: International Society for Optical Engineering
Funding Number(s)
WBS: 405034.
Distribution Limits
Work of the US Gov. Public Use Permitted.
Technical Review
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