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Návrh a realizace metamateriálové struktury
Kovaľová, Soňa ; Drexler, Petr (oponent) ; Nešpor, Dušan (vedoucí práce)
Práca sa zaoberá návrhom periodických rezonančných štruktúr, skúmaním ich vplyvu na okolité elektromagnetické pole a realizáciou magnetoinduktívnej šošovky s potenciálnym využitím pri zobrazovaní pomocou nukleárnej magnetickej rezonancie a jej kmitočtovým ladením variáciou rôznych parametrov. Na analýzu vlastností navrhovaných štruktúr bola použitá numerická metóda konečných prvkov v programe Ansys HFSS.
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Interferometric measurement of optical signal in turbulence
Kovaľová, Soňa ; Křivák,, Petr (oponent) ; Hudcová, Lucie (vedoucí práce)
The aim of this thesis is to quantify the impact of atmospheric turbulence on optical signal used in free space optic communication systems. The first part is associated with atmosphere as transmission medium. Following part deals with interferometry and components of interferometers. Various methods of analysis of trasmission environment for optical beam are introduced theoretically and experimentally. Mathematical apparatus based on Kolmogorov’s cascade theory, Rytov’s variance was used to find value of structural parameter of refraction as a main measure of turbulence intensity. Experimentally obtained data were subjected to statistical analysis. The visualization of interference pattern fluctuations under turbulent conditions is shown in the last section. Interferometric method was realized with Michelson interferometer.
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Interferometric Measurement Of Optical Signal In Turbulence
Kovaľová, Soňa
This project deals with the measuring of the impact of atmospheric turbulence on laser beam used in wireless optical communication. The method is based on interferometry with using of Michelson interferometer. Mathematical apparatus comes from Kolmogorov’s cascade theory and statistical analysis.
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Interferometric measurement of optical signal in turbulence
Kovaľová, Soňa ; Křivák,, Petr (oponent) ; Hudcová, Lucie (vedoucí práce)
The aim of this thesis is to quantify the impact of atmospheric turbulence on optical signal used in free space optic communication systems. The first part is associated with atmosphere as transmission medium. Following part deals with interferometry and components of interferometers. Various methods of analysis of trasmission environment for optical beam are introduced theoretically and experimentally. Mathematical apparatus based on Kolmogorov’s cascade theory, Rytov’s variance was used to find value of structural parameter of refraction as a main measure of turbulence intensity. Experimentally obtained data were subjected to statistical analysis. The visualization of interference pattern fluctuations under turbulent conditions is shown in the last section. Interferometric method was realized with Michelson interferometer.
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The Design and Realisation of Metamaterial
Kovaľová, Soňa
The work discusses periodic resonant structures with negative permeability (metamaterials) as an improvement of NMR tomograph resolution. The aim of work is to design and adjust magnetoinductive lens for application in nuclear magnetic resonance imaging. The software Ansys HFSS was used for finite element method analysis of designed structure.
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Návrh a realizace metamateriálové struktury
Kovaľová, Soňa ; Drexler, Petr (oponent) ; Nešpor, Dušan (vedoucí práce)
Práca sa zaoberá návrhom periodických rezonančných štruktúr, skúmaním ich vplyvu na okolité elektromagnetické pole a realizáciou magnetoinduktívnej šošovky s potenciálnym využitím pri zobrazovaní pomocou nukleárnej magnetickej rezonancie a jej kmitočtovým ladením variáciou rôznych parametrov. Na analýzu vlastností navrhovaných štruktúr bola použitá numerická metóda konečných prvkov v programe Ansys HFSS.
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