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The paper is focused on analysing of the distribution of optical intensity within a laser beam at the focal plane of the receiving optics which is affected mainly by diffraction of the optical wave in the Schmidt-Cassegrain telescope. The paper discusses the differences between diffraction of the optical wave on circular and annular aperture. In order to simplify the model of diffraction the Schmidt-Cassegrain...
This study is focused on analysing the optimal distribution of optical intensity within a radiated laser beam at a transmitter plane which is propagated through free space as well as through a turbulent atmosphere. To analyse the propagation of an optical wave through atmospheric turbulence, the simulation, based on the split-step beam propagation method, was utilised. The aim of this study is to...
The paper deals with numerical modeling of the testbed for measuring the coupling efficiency of the fully photonic receiver for optical wireless communication. The numerical model is based on transformation of the Gaussian beam through optical system described by ray matrices. The design process of the testing transmitter and fully photonic receiver is discussed. Finally the coupling efficiency of...
The paper deals with terrestrial optical wireless links operating with coherent laser beams. The contribution discusses the full photonic transceiver concept (transmitter and receiver). Two main types of optical wireless links are mentioned: test link and data link. The purely photonic concept of the links with its advantages over the conventional concept is presented and discussed. The modeling of...
The main purpose of this paper is the design and simulation of a laser beam shaping system which can be used in a Free Space Optical (FSO) communication transmitter terminal prototype. It is known that a top-hat beam source is less affected from turbulence in the atmosphere than a Gaussian beam source. The design of a refraction beam shaper has been performed and verified in the optical design software...
A design and simulation of the laser beam shaping system which can be used in free space optical communication transmitter head prototype are presented. The design of refraction beam shaper has been performed and verified in optical design software ZEMAX. Because a Top-hat beam source is less affected by turbulence in atmosphere comparing with a Gaussian beam source, the scintillation index of the...
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...
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