Author
Nouri, Hatef, Uysal, Murat
Publication Date
2020-06-01
Publication Place
-
The Optical Society
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0146-9592
Record ID
f0549201-1380-4509-9720-afd663572916
Library Location
Electrical & Electronics Engineering
Date
2020-06-01
Sample Text
Atmospheric turbulence is a major impairment in free-space optical (FSO) communication systems. Based on the fact that the size of receiver aperture is much larger than operation wavelength, aperture averaging extracts inherent receiver diversity gains and can be used as an effective fading mitigation technique. In this Letter, we consider the three most common wavelengths used in telecommunications, namely 1550, 1310, and 850 nm, and present a comparative performance evaluation of aperture averaging under the same emulated atmospheric conditions. Our emulator is in the form of an atmospheric chamber equipped with adjustable heaters, coolers, and fans to create the desired level of turbulence. Our results demonstrate that by changing the wavelength and/or aperture size, a strong turbulence condition with Gamma-Gamma statistics can turn into a weak turbulence condition with log-normal statistics. Such a phenomenon can be observed even for relatively small aperture sizes if the wavelength is sufficiently high.
DOI
10.1364/OL.389808
Cilt
45
