National Repository of Grey Literature 32 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Simulation And Measurement Of Mach-Zehnder Interferometer
Cucka, Milan ; Salik, Pavol
The paper focuses on simulation and measurement of Mach-Zehnder interferometer. This type of sensor is used as a distributed fiber optic sensor for sensing vibration, mechanical tension and temperature. Fiber optic sensors based on optical interferometry are now widely used, e.g. Sagnac interferometer in optic gyroscopes. Mach-Zehnder interferometer is used for measurement of transformers temperature. The article includes a simulation of interferometric systems in VPIphotonics simulation software and it also includes scientific notation of a signal and a short description of the used simulation systems.
MRI compatible optic fiber thermometer
Stibůrek, Miroslav ; Čučka, Milan (referee) ; Harabiš, Vratislav (advisor)
The following work deals with basics of fiber optics, history of fiber optics, and methods of measuring physical quantities with the use of fiber optic sensors. The work includes facts about physics, chemistry and biology - these elements are necessary for a full understanding of the issue. In order to create an optical fiber temperature sensor based on Fabry Perot resonator principle, several methods of manufacturing the optical cavity are investigated. A practical part of paper consist in the manufacturing of the miniature fiber thermometer, its coating and testing.
Sensor based on a fiber optic interferometer
Rozsypal, Filip ; Dejdar, Petr (referee) ; Čučka, Milan (advisor)
This diploma thesis deals with comparsion of 2x2 and 3x3 couplers. There is also description of issue of the Michelson interferometer and its use as a sensor. This sensor is very good at detecting vibrations. Part of the work is description of simulation of Michelson interferometer with 3x3 coupler as vibration sensor and localization of vibration on optical fiber by Michelson and Mach-Zehnder interferometer.
Pulse Generator for Φ-OTDR in VPI photonics
Čučka, Milan
The paper focuses on Φ–OTDR (Optical Time Domain Reflectometry) systems which need short time duration and high powered pulses for proper function, because the backscattered signal is weak for proper detection. The article includes a simulation of the signal generator for Φ–OTDR sensoric systems in simulation software. Designed generator allows to try pulses, with different time of duration, pulse repetition frequency and power. The article also includes scientific notation of backscattered signal and a short description of the used systems.
Optical fiber sensor based on Michelson interferometer
Kopáč, Ondřej ; Grenar, David (referee) ; Čučka, Milan (advisor)
This bachelor thesis deals with description and simulation of Michelson unbalance interferometer and description of fiber optic sensors. The simulation is realized by MatLab. The thesis also described basic optical phenomena, types of optical fibers and two types of interferometric detection. The thesis also deals with description of measurements and their results.
Evaluation of the Financial Situation of MY DVA group, a.s. and Proposals for Improvements
Šprta, František ; Čučka, Milan (referee) ; Zinecker, Marek (advisor)
This diploma thesis deals with evaluation of the financial situation of MY DVA group, a.s. in the years 2012-2016. The selected methods of strategic and financial analysis determine the strengths and weaknesses of the financial management of the company. Based on these results, it formulates proposals to address these shortcomings in the future and to improve the company's financial health.
Verification of stable next generation networks via transmission parameters measurement
Gregor, Lukáš ; Čučka, Milan (referee) ; Grenar, David (advisor)
This thesis deals with the measurement of transmission parameters in the new generation access networks NGA. The aim of the thesis is to build and configure a test network and scenarios for the measurement of service quality parameters and then verify the transmission stability. The theoretical part describes general functioning of NGN networks, the requirements of different telecommunications services on quality parameters, methodology and recommendations for measuring transmission parameters in packet networks. The practical part deals with the configuration of scenarios using mainly MPLS technology and methodology of their testing. Measurements were performed according to recommendations IETF RFC 2544, IETF RFC 6349 with the ExacTCP test and ITU-T Y.1564 with the EtherSAM test. For measurements were used measuring instruments of EXFO brand. In conclusion, the measurement results according to the mentioned standards were evaluated and also the advantages of using the measurement according to the given standard in NGA access networks were discussed.
Processing of signals from fiber optic sensors
Sikora, Vojtěch ; Urban, František (referee) ; Čučka, Milan (advisor)
First two chapters of this paper deals with the division of optical fiber sensors, digital signal processing and includes price comparison of four experimental sensors. In chapter three analysis, description and evaluation of measurment has been demonstrated on Mach - Zehnder interferometer. Last chapter is about application for signal analysis from vibration sensors. Description contains snippets from source code and graphical user interface. This paper includes three fields - fiber optics, digital signal processing and creation of application - and thanks to them it provides solid basis for study of optic fiber sensors.
Longitudinal index structures in optical fibers
Polreich, Štěpán ; Čučka, Milan (referee) ; Urban, František (advisor)
This thesis describes basic concepts, principles and properties of optical fibers. Considerable part is devoted to fiber gratings that are created by a change in the refractive index in the optical fiber core. In this work is described description, principle, method od production and distribution of gratings on Bragg gratings, gratings with long period and chirped gratings. In this thesis are also presented different types of lasers and their advantages over other lasers. A large part deals with the description of the femtosecond laser, with which the structures will be later made into the material. In addition, the laser modes are differentiated, this is a mode of micro-machining and modification or a change in refractive index of the material. The last part deals with change the refractive index in planar technology, the creation of a groove for fastening the fiber and attempts to write the gratings into the optical fiber. Created fiber sensor are tested for temperature and tensile changes. Finally, the practical use of sensors made by femtosecond laser and the advantages over UV laser and phase mask techniques are presented.
Distributed fiber optic sensors
Holík, Tomáš ; Čučka, Milan (referee) ; Münster, Petr (advisor)
The thesis deals with the possibility of using optical fiber as a sensor. The introduction of the thesis is devoted to the foundations of optics. In addition, the thesis deals with optical interferometry, polarization and dispersion in optical fiber. The main output of the thesis is the comparison of acoustic vibration measurements using interferometric and polarization methods and further measurements on the real route in Brno.

National Repository of Grey Literature : 32 records found   1 - 10nextend  jump to record:
See also: similar author names
4 Cucka, Milan
1 Čučka, M.
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