Optimální rozložení optické intenzity v laserovém svazku pro FSO komunikace
Loading...
Date
Authors
ORCID
Advisor
Referee
Mark
P
Journal Title
Journal ISSN
Volume Title
Publisher
Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
Abstract
Dizertačná práca je zameraná na štúdium a analýzu rozloženia optickej intenzity v laserovom zväzku v rovine vysielacej (TXA) a prijímacej apertúry (RXA), ktorý podlieha zmenám ako pri šírení voľným priestorom, tak pri šírení atmosférou. Cieľom práce je nájsť optimálne rozloženie optickej intezity v rovine vysielacej apertúry, ktoré bude minimálne ovplyvnené apertúrou vysielača a atmosférickými turbulenciami. Za účelom analýzy šírenia optickej vlny atmosférou bola využitá simulácia založená na metóde Split-Step. Šírenie Flattened Gaussian zväzku bolo analyzované pre režim slabých a stredných turbulencií. Práca sa zaoberá použitím multimódového vlákna s veľkým priemerom jadra ako tvarujúceho elementu a obsahuje návrh refrakčného tvarovača, pomocou ktorého je možno konvertovať Gaussovský zväzok na zväzok s uniformným rozložením optickej intenzity. Nakoniec je pomocou získaných poznatkov zostavený plne fotonický vysielač a prijímač, ktorých použitie spočíva v generovaní a príjmaní optickej koherentnej vlny prenášajúcej presnú fázu.
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.
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.
Description
Citation
BARCÍK, P. Optimální rozložení optické intenzity v laserovém svazku pro FSO komunikace [online]. Brno: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. 2016.
Document type
Document version
Date of access to the full text
Language of document
en
Study field
Elektronika a sdělovací technika
Comittee
prof. Ing. Aleš Prokeš, Ph.D. (předseda)
doc. Ing. Ondřej Fišer, CSc. (člen)
prof. RNDr. Vladimír Vašinek, CSc. (člen)
prof. Ing. Čestmír Vlček, CSc. (člen)
doc. Ing. Václav Zeman, Ph.D. (člen)
prof. Carlo Capsoni - oponent (člen)
Ing. Ondřej Číp, Ph.D. - oponent (člen)
Date of acceptance
2016-12-05
Defence
Result of defence
práce byla úspěšně obhájena
Document licence
Standardní licenční smlouva - přístup k plnému textu bez omezení