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Přesný diferenční teploměr
Sieklik, Ivan ; Wilfert, Otakar (oponent) ; Barcík, Peter (vedoucí práce)
Práca sa zaoberá princípom a realizáciou merania štruktúrneho parametru indexu lomu, pomocou diferenciálneho teplomera. V tejto práci sú uvedené základné vlastnosti atmosférického prenosového prostredia a ich vplyv na šíriacu sa optickú vlnu. Ďalej sú predstavené a opísané základné typy senzorov určené na meranie teploty. Hlavným cieľom práce je navrhnúť diferenciálny teplomer s možnosťou merania štruktúrneho parametru indexu lomu.
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Optimal Intensity Distribution in a Laser Beam for FSO Communications
Barcík, Peter ; Capsoni, Carlo (oponent) ; Číp, Ondřej (oponent) ; Wilfert, Otakar (vedoucí práce)
The doctoral thesis is focused on analysing the distribution of optical intensity within a radiated laser beam at the plane of the transmitting (TXA) and receiving (RXA) aperture which is affected by propagation through free space as well as through the atmosphere. The aim of the thesis is to determine the optimal intensity distribution of the laser beam at the transmitter plane which is less affected by turbulence during propagation and transmitter aperture itself. In order to analyse the propagation of an optical wave through atmospheric turbulence, the simulation based on the Split-Step method is utilized. The propagation of the Flattened Gaussian beam was analysed for weak and moderate turbulence regimes. The thesis discusses usage of multimode fiber with large diameter as a shaping element and includes a design of the refraction beam shaper which is able to convert the Gaussian beam to a flattened Gaussian beam. Finally, a model of a fully photonic transmitter and receiver was built. The system is used for generating and receiving an optical coherent wave.
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Optimal Intensity Distribution in a Laser Beam for FSO Communications
Barcík, Peter ; Capsoni, Carlo (oponent) ; Číp, Ondřej (oponent) ; Wilfert, Otakar (vedoucí práce)
The doctoral thesis is focused on analysing the distribution of optical intensity within a radiated laser beam at the plane of the transmitting (TXA) and receiving (RXA) aperture which is affected by propagation through free space as well as through the atmosphere. The aim of the thesis is to determine the optimal intensity distribution of the laser beam at the transmitter plane which is less affected by turbulence during propagation and transmitter aperture itself. In order to analyse the propagation of an optical wave through atmospheric turbulence, the simulation based on the Split-Step method is utilized. The propagation of the Flattened Gaussian beam was analysed for weak and moderate turbulence regimes. The thesis discusses usage of multimode fiber with large diameter as a shaping element and includes a design of the refraction beam shaper which is able to convert the Gaussian beam to a flattened Gaussian beam. Finally, a model of a fully photonic transmitter and receiver was built. The system is used for generating and receiving an optical coherent wave.
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Přesný diferenční teploměr
Sieklik, Ivan ; Wilfert, Otakar (oponent) ; Barcík, Peter (vedoucí práce)
Práca sa zaoberá princípom a realizáciou merania štruktúrneho parametru indexu lomu, pomocou diferenciálneho teplomera. V tejto práci sú uvedené základné vlastnosti atmosférického prenosového prostredia a ich vplyv na šíriacu sa optickú vlnu. Ďalej sú predstavené a opísané základné typy senzorov určené na meranie teploty. Hlavným cieľom práce je navrhnúť diferenciálny teplomer s možnosťou merania štruktúrneho parametru indexu lomu.
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