Study of strong turbulence effects for optical wireless links
Author
Yüksel, H.
Meriç, Haşim
Kunter, F.
Date
2012Source Title
Proceedings of SPIE Vol. 8517, Laser Communication and Propagation through the Atmosphere and Oceans
Print ISSN
0277-786X
Publisher
SPIE
Volume
8517
Pages
1 - 14
Language
English
Type
Conference PaperItem Usage Stats
149
views
views
118
downloads
downloads
Abstract
Strong turbulence measurements that are taken using real time optical wireless experimental setups are valuable when studying the effects of turbulence regimes on a propagating optical beam. In any kind of FSO system, for us to know the strength of the turbulence thus the refractive index structure constant, is beneficial for having an optimum bandwidth of communication. Even if the FSO Link is placed very well-high-above the ground just to have weak enough turbulence effects, there can be severe atmospheric conditions that can change the turbulence regime. Having a successful theory that will cover all regimes will give us the chance of directly processing the image in existing or using an additional hardware thus deciding on the optimum bandwidth of the communication line at firsthand. For this purpose, Strong Turbulence data has been collected using an outdoor optical wireless setup placed about 85 centimeters above the ground with an acceptable declination and a path length of about 250 meters inducing strong turbulence to the propagating beam. Variations of turbulence strength estimation methods as well as frame image analysis techniques are then been applied to the experimental data in order to study the effects of different parameters on the result. Such strong turbulence data is compared with existing weak and intermediate turbulence data. Aperture Averaging Factor for different turbulence regimes is also investigated.
Keywords
Aperture averagingFree space optical communication
Intensity variance
Optical wireless link
Refractive index structure constant Cn 2
Strong turbulence