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Simulation of Mach Zehnder interferometer
Rozsypal, Filip ; Münster, Petr (referee) ; Čučka, Milan (advisor)
This bachelor thesis deals with the simulations of Mach-Zehnder and Michelson interferometer. These simulations are realized by VPIphotoncs and MatLab. The thesis also describes the optical and physical phenomena, the usage and the principle of operation of interferometers and results of measurements with validation of the basic work of both interferometers.
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Influence of magnetic and electromagnetic fields on signals transmitted by optical fibres
Schneider, Tibor ; Vrba, Kamil (referee) ; Münster, Petr (advisor)
The diploma thesis deals with the influence of magnetic and electromagnetic fields on signals transmitted by optical fibers. Subsequently, the results of individual measured values are evaluated and analyzed, which were measured using an interferometer and a polarimeter. The first part deals with the theoretical analysis of the principles of interference and polarization of light. It further explains the basic operation of the above-mentioned devices as well as the immunity of the optical fiber to EMI. The second part of the work presents selected devices and technologies that were used as a source of electromagnetic or magnetic radiation. Subsequently, individual phenomena are plotted both in the course of time and with the help of a spectrogram or Poincaré sphere. From the measured results we can conclude that the commonly available technologies, which were selected for the diploma thesis, will not cause greater negative problems to the signal on measured frequencies in optical fibre, that could degrade the transmitted signal.
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Design of Compact Spectrometer
Górová, Simona ; Haltof, Vladimír (referee) ; Fridrichová, Eva (advisor)
The content of this bachelor thesis is a design of table FTIR spectrometer which can be used for nowadays analytical techniques, whereas it allows to analyse samples of larger size. Moreover, an added value is a combination of two analytical methods which are placed together with a camera from bellow of the device. It makes the device usable, not only for contemporary target workplaces (laboratories, research centers…) but also in galleries and other art institutions. Default step for this work was a market research, studying of inner components and functions od spectrometers and user requirements.
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Location of vibration around the optical fiber
Dorazin, David ; Urban, František (referee) ; Čučka, Milan (advisor)
This diploma thesis solves possibilities of utilization optical fiber as sensor. At the beginning, basic division of this sensors is desribed, their principles and usage. Then the thesis is focused on distributed sensors based on the interference of the light, interferometers. This optic fiber interferometers are described, mainly their modifications for detection and localization of vibrations along optical fiber. Significant part of the thesis deals with dual Mach--Zehnder interferometer. This interferometer is theoreticaly desribed and simulated in Matlab. Further the thesis deals with development of two aplication in Matlab software. One application is for simulation and theoretical computation of dual Mach--Zehnder interferometer. Second application serves for signal processing of acquired data that are measured on this interferometer. At the end of the thesis, dual Mach--Zehnder interferometer is designed and build in laboratory enviroment and executed measurement and localization of vibrations using this interferometer.
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Leakage of information through existing fibre optic infrastructures inside buildings
Kyselova, Yuliia ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
The bachelor thesis deals with the possibilities of detecting acoustic and mechanical vibrations through existing optical data infrastructures inside buildings. The work includes a description about optical fiber and a theoretical analysis of the possibilities of implementing data distribution inside buildings, it also includes an analysis of methods for implementing optical fiber microphones. In the practical part of the work, the measurement was performed with an optical fiber microphone and then using an interferometer and a sensor based on the polarization method.
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Design of Compact Spectrometer
Górová, Simona ; Haltof, Vladimír (referee) ; Fridrichová, Eva (advisor)
The content of this bachelor thesis is a design of table FTIR spectrometer which can be used for nowadays analytical techniques, whereas it allows to analyse samples of larger size. Moreover, an added value is a combination of two analytical methods which are placed together with a camera from bellow of the device. It makes the device usable, not only for contemporary target workplaces (laboratories, research centers…) but also in galleries and other art institutions. Default step for this work was a market research, studying of inner components and functions od spectrometers and user requirements.
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Influence of magnetic and electromagnetic fields on signals transmitted by optical fibres
Schneider, Tibor ; Vrba, Kamil (referee) ; Münster, Petr (advisor)
The diploma thesis deals with the influence of magnetic and electromagnetic fields on signals transmitted by optical fibers. Subsequently, the results of individual measured values are evaluated and analyzed, which were measured using an interferometer and a polarimeter. The first part deals with the theoretical analysis of the principles of interference and polarization of light. It further explains the basic operation of the above-mentioned devices as well as the immunity of the optical fiber to EMI. The second part of the work presents selected devices and technologies that were used as a source of electromagnetic or magnetic radiation. Subsequently, individual phenomena are plotted both in the course of time and with the help of a spectrogram or Poincaré sphere. From the measured results we can conclude that the commonly available technologies, which were selected for the diploma thesis, will not cause greater negative problems to the signal on measured frequencies in optical fibre, that could degrade the transmitted signal.
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Fiber Optic Interferometry
Srnský, Petr
The aim of this thesis is a theoretical analysis of fiber sensoric sensing using coherent interferometry. The first part deals with the description of the sensoric fiber optic sensing and basic physical laws. In the second part is designed model of Mach-Zehnder interferometer in simulation environment VPI photonics. The latest proposal is focused on the implementation of Mach Zehnder interferometer for real functional connections.
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Utilization and Suppression of Birefringence Phenomena in Optical Fiber Sensory Applications
Motúz, Rastislav ; Hudcová, Lucie (referee) ; Vlček, Čestmír (referee) ; Drexler, Petr (advisor)
The thesis deals with integral and distributed optical fiber sensors of electric current. In the area of integral sensors the analysis is performed by Jones matrix calculus and the simultaneous influence of induced circular and undesired linear birefringence using an ortho-conjugation retroreflector. Furthermore, the proposed conjugation loop variant using half-wave phase retarders is analyzed. The theoretical conclusions are confirmed by simulation and experimental measurement. In the field of distributed fiber optic sensors, analysis and simulation for the detection of plasma currents in thermonuclear fusion reactors, based on the POTDR technique, is performed. An improvement procedure is proposed for circular-shaped vacuum vessel reactors. Plasma current detection procedure in divertor-type reactors have been newly designed and simulated to investigate the effect of the OTDR detector noise on plasma current detection accuracy.
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