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Free space optical (FSO) communication links offer a number of advantages over radio frequency links. Main advantages of FSO communication links are electromagnetic compatibility, license-free band and high data rate. However, reliability of these links is highly dependent on atmospheric and weather conditions. An optical wave propagating through the atmospheric transmission media is very sensitive...
The paper deals with study of temperature turbulences effect towards the optical beam. The horizontally and vertically polarized optical beams have been studied. The turbulence flux has the vertical direction and the optical beam is propagating through the atmosphere environment with three different states of turbulences. The evaluation of obtained data was done by means of relative variance of optical...
The paper is focused on the comparison of Top Hat and Gaussian beam properties from the perspective of received optical power. Gaussian beam is very well known, so there isn't necessary to describe it, on the other hand Top Hat beam, which is created from Gaussian beam, isn't used so widely. Creation of Top Hat is briefly described in this contribution. The main point of the contribution is comparison...
This work is focused on the quick determination of characteristics of the atmospheric transmission media in optical band. Optical wireless links are briefly introduced. Two of the most important effects influencing optical signal properties in the atmosphere are shortly described. The goal of the work is in analysis of optical intensity profile. Due to the changes in the intensity profile we are able...
This paper deals with the influence of atmospheric turbulence on the rangefinder laser beam. Analogous to the optical wireless links, turbulent flow causes optical intensity variation at the receiver plane. In optical communication, most problems namely at longer distances, are caused by beam scintillation and by beam wandering. In range finding systems, a strong influence from irradiated surfaces...
This work is focused on the optical wireless links working in turbulent atmospheric transmission media. A phenomenon of atmospheric turbulence is briefly introduced and relative variance of optical intensity in laser beam profile is presented. The goal of this paper is to determine the distribution of optical intensity relative variance in laser beam profile. According to the experimental results...
The communication quality of terrestrial optical wireless links (TOWL) depends on the link characteristics and weather conditions. For the TOWL purposes, beam propagation through the atmosphere can be modeled using the combination of the ABCD law and the mean irradiance concept. In the model of beam propagation through the atmosphere, not only the circular symmetry of the optical elements (transmitting...
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