Beam propagation through atmospheric turbulence using an altitude-dependent structure profile with non-uniformly distributed phase screens

Yousef K. Chahine; Sarah A. Tedder; Brian E. Vyhnalek; Adam C. Wroblewski

doi:10.1117/12.2543583

2 March 2020 Beam propagation through atmospheric turbulence using an altitude-dependent structure profile with non-uniformly distributed phase screens

Yousef K. Chahine, Sarah A. Tedder, Brian E. Vyhnalek, Adam C. Wroblewski

Author Affiliations +

Proceedings Volume 11272, Free-Space Laser Communications XXXII; 1127215 (2020) https://doi.org/10.1117/12.2543583
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Modeling 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 splitstep 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.

Citation Download Citation

Yousef K. Chahine, Sarah A. Tedder, Brian E. Vyhnalek, and Adam C. Wroblewski "Beam propagation through atmospheric turbulence using an altitude-dependent structure profile with non-uniformly distributed phase screens", Proc. SPIE 11272, Free-Space Laser Communications XXXII, 1127215 (2 March 2020); https://doi.org/10.1117/12.2543583

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available