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Utilization of light polarization when filtering the optical signal
Alexa, Jan ; Vlček, Čestmír (referee) ; Wilfert, Otakar (advisor)
This master thesis deals with the possibility of separation of useful signal from noise using polarization of laser radiation. This thesis is structured into 5 thematic units. The first unit is focused on laser radiation and its properties. The second part contains a deeper focus on the polarization of radiation, its description and the possibilities of measuring the polarization states. The third part of the thesis is devoted to the design of the measuring chains and identification of used elements. Chapter four contains measurement of status of the polarization and its results. The last chapter analyzes particular measuring chains outputs according to their spectral characteristics.
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Trends in Access Networks
Štěpán, Petr ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
This work deals with the modern trends in FTTX, but mainly focuses on FTTH, who represents the connecting of fiber to the homes of the participants. Sum up the basic problems of communication on the optical fibre, followed by comparison with other types of access networks. Another part is the analysis of the problems of construction and a description of the optical network topologies and technologies used in FTTH. In following chapter are characterized active and passive elements forming AON and PON networks. Next part deals with the study of the most common services that can be on the optical access network to operate. They are mainly associated with the TriplePlay services. An integral part of the project is the study of management and supervision optical networks. In the main part is created real model situation where is the requirement for the creation of optical access networks with broadband of TriplePlay, followed by selection of appropriate options and detailed project with a selection of active and passive elements with economic balance.
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Simultaneous transmission of photonic services in fibre optics
Látal, Michal ; Horváth, Tomáš (referee) ; Münster, Petr (advisor)
Diploma thesis focuses on simultaneous transmission of selected photonic services by one single-mode optical fiber. The thesis deals with the problem of common transmission of multiple photonic services by one optical fiber using the wavelength division multiplex technology. Furthermore, the origin and influence of nonlinear phenomena accompanying the simultaneous transmission of photonic services are described. Except common data transmission with a bitrate of 10 Gbit/s, a common high-speed data signal transmission with a bitrate of 200 Gbit/s, accurate time transmission and high-power sensor signal are considered. During the aimultaneous transmission of selected photonic services, the measurement of the transmission parameters was performed for various variants of the simultaneous transmission arrangement. In particular, the influence of nonlinear phenomena and possible mutual interference of individual transmission channels at 50 and 100 GHz between signals was analyzed.
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Photonic Services Testbed
Kubica, Matěj ; Škorpil, Vladislav (referee) ; Horváth, Tomáš (advisor)
Bachelor thesis focuses on the theoretical analysis of optical cables and it‘s fusion splicing and distribution. This thesis deals with basic difference between different types of optical fibers. Importance is put on singlemode fibers and it‘s standardization. Following by analysis of different techniques of uniting optical fibers and distribution of cables inside buildings. In the practical part the realization of individual joints with measured values is described. Next part describes connection of individual fibers into optical bath. This connection is completely documented and certain services are realized on selected fibers
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Synchronization of measuring devices by optical fibres
Petr, Ondřej ; Šebesta, Jiří (referee) ; Dřínovský, Jiří (advisor)
The aim of this work was to get acquainted with the possibility of transmission of RF signals using optical cables. And design synchronization modules to transmit the reference signal, so that the source and the receiver of the signal are time-synchronized and mutually galvanically separated using optical cable. To transmit and receive optical signals through optical fiber, I chose the transmitter and receiver of the series HBR- 0400 the company Agilent Technologies.
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New trends in fibre optic sommunications
Lubajo, Lubajo Moses Wolyan ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
Přenos optickych vláken je jednou z hlavních metod přenosu informací pro přenos na velké vzdálenosti. Byly vyvinuty různé modulační formáty pro maximalizaci informací přenášenych prostřednictvím komunikačního kanálu. Takové formáty sahají od formátů, které přenášejí jeden bit na symbol (jako je například binární fázové posunování klíčů, BPSK), a nebo vice, jako je například Kvadraturní fázové posunovací klíčování, duální polarizační kvadraturní fázové řazení a mnoho dalších ostatní modulace. Cílem diplomové práce je vytvořit a implementovat přenosovy systém s rychlostí 100 Gbps pomocí modulace formátu DP QPSK. Vysledky jsou shrnuty s ohledem na to, co bylo úspěšně implementováno, a zlepšení, která mohou byt ještě učiněna pro zvyšení přenosové vzdálenosti a snížení BER mimo jiné. Použitysimulační software je PHOTOSS.
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Laboratory exercise - EDFA amplifier
Mahút, Michal ; Münster, Petr (referee) ; Dejdar, Petr (advisor)
The bachelor thesis is describing in detail a scheme of an EDFA optical amplifier consisting of appropriate components, insertion of the device and software deployment. The whole thesis is divided into several categories. First theoretical analysis of optical-fiber cables that describes the types of optical-fiber cables, limiting phenomena affecting signal transmission in optical fibers, wave multiplexing and optical amplifiers. The implementation of the connection was built on the Red Pitaya platform, which controls the control of the MOT350_35100GC laser pump. The software controlling the EDFA amplifier was created in the LabView development environment. The appropriate connection of the pump source and the choice of the length of the erbium fiber to achieve the highest possible gain of reinforcement was verified experimentally. Part of the bachelor's thesis is a laboratory task, acquainting the solver with the problem of optical amplifiers with measurement of gain for various configurations of pump source, erbium fiber and pump power.
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Bragg gratings in optical fibers
Urban, František ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
Thesis focuses on the principles and properties of the tilted Bragg fiber gratings. Two models of the principal cladding mode behaviour are proposed and ther respective results compared with experimental data. The experimental setup for the preparation of the tilted gratings is described. The thesis shows the evaluation of the gratings parameters for the set of prepared gratings. Application of the tilted gratings in the sensors is discussed
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Transmission of accurate time and stable frequency through the optical network
Girt, Lukáš ; Horváth, Tomáš (referee) ; Vojtěch, Josef (advisor)
Diploma thesis focuses on the theoretical analysis of precise time and stable frequency transfer. It describes what time and frequency is, their properites and options of their generation. Next part deals with different possibilities of time and frequency transfer especially using fiber optics. In the practical part equipment for analysing effects of temperature changes on precise time transfer is puted into operation. Arduino platform is used for monitoring temperature changes on fiber. For testing of frequency stability in variable temperature conditions of environmental chamber device is created using highly coherent laser.
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Optimization of production process at ADC Czech Republic s.r.o
Cháma, Jakub ; Obdržálek, Radim (referee) ; Štroner, Marek (advisor)
This diploma thesis deals with the optimization of production process at ADC Czech Republic s.r.o. Primarily, the method of Lean Six Sigma is used. The first part has a form of the literary study where individual methods used within the company are described. These are further applied in the practical part. The second part presents a brief introduction of the company including the production portfolio. The last part focuses on the practical solution of particular problems of two packaging lines aiming to increase the utilization. In the thesis, the DMAIC improvement cycle is employed.
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