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OTDR optical path analyzer
Šimková, Barbora ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The aim of this master's thesis was a theoretical analysis of OTDR issues, analysis of OTDR device components, as well as basic parameters of this device. The thesis also includes a theoretical analysis of reflections, scattering, and various types of connectors. In the practical part, a circuit design for OTDR measurement was developed and subsequently implemented. The circuit was realized using the Red Pitaya development board and Koheron laser. Additionally, a circuit for direct method measurement was also created. In the LabView development environment, a program was created, including a graphical user interface. A laboratory task was also designed to provide a basic understanding of OTDR measurement issues.
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Optical connections and their influence on transmission
Jaroš, Pavel ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
The aim of this bachelor‘s thesis is to evaluate the current options of connecting optical fibres and their application in specific situations. Firstly, I will deal with fiber optic system and its components in detail. Then, this topic will be futher developed by discussing fibre connection problems, fusion splicing for making permanent fiber join, mechanical splice and, most of all, optical connectors. In following chapters I introduce mathematical dependence of attenuation on the relative possition of the ends of fibers. Another aim of the work was to create an application in a suitable programming enviroment, which will be used for design of optical path.
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Fiber joints and their protection
Galovič, Dominik ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
The bachelor thesis deals with the issue of optical fiber joining. The theoretical part describes the methods of optical fiber splicing, protection of optical splices and possible errors that affect the quality of the optical splice. Also described are methods for measuring important optical joint parameters, such as attenuation or reflection attenuation. An important part of the work is a description of the restoration of primary protection of spliced fiber. The theory is further applied in the practical part, where the attenuation of the optical links was measured using the mentioned methods. It also includes a comparison of the mechanical strength of optical splice and a joint formed by optical connectors. This knowledge is then applied in a proposal for minimizing the optical splice and proposals for restoring the primary protection of the optical splice was described.
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Quantum cryptography
Turčanová, Klára ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
The bachelor thesis focuses on quantum cryptography. In the theoretical part, there is an analysis of secure key distribution in the fiber-optic infrastructure. Methods such as quantum key distribution (QKD) or physical layer secret key generation for fiber-optic networks are analyzed, including a description of the security and technical limitations of the methods. The thesis also attempts to interpret some basic principles of the optic infrastructure used in QKD. In addition to the distribution of keys, the thesis also tries to approximate the basic principles of the optic infrastructure used in QKD and, last but not least, post-quantum cryptography (including a comparison with quantum cryptography and current protocols). In the practical part, the effect of the macrobending of the fiber and the reflectivity of the connectors on the operation of the quantum system was demonstrated. It was also demonstrated that temperature and light acting on the QKD optic infrastructure do not have a fundamental effect.
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OTDR optical path analyzer
Šimková, Barbora ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The aim of this master's thesis was a theoretical analysis of OTDR issues, analysis of OTDR device components, as well as basic parameters of this device. The thesis also includes a theoretical analysis of reflections, scattering, and various types of connectors. In the practical part, a circuit design for OTDR measurement was developed and subsequently implemented. The circuit was realized using the Red Pitaya development board and Koheron laser. Additionally, a circuit for direct method measurement was also created. In the LabView development environment, a program was created, including a graphical user interface. A laboratory task was also designed to provide a basic understanding of OTDR measurement issues.
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Fiber joints and their protection
Galovič, Dominik ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
The bachelor thesis deals with the issue of optical fiber joining. The theoretical part describes the methods of optical fiber splicing, protection of optical splices and possible errors that affect the quality of the optical splice. Also described are methods for measuring important optical joint parameters, such as attenuation or reflection attenuation. An important part of the work is a description of the restoration of primary protection of spliced fiber. The theory is further applied in the practical part, where the attenuation of the optical links was measured using the mentioned methods. It also includes a comparison of the mechanical strength of optical splice and a joint formed by optical connectors. This knowledge is then applied in a proposal for minimizing the optical splice and proposals for restoring the primary protection of the optical splice was described.
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|
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Optical connections and their influence on transmission
Jaroš, Pavel ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
The aim of this bachelor‘s thesis is to evaluate the current options of connecting optical fibres and their application in specific situations. Firstly, I will deal with fiber optic system and its components in detail. Then, this topic will be futher developed by discussing fibre connection problems, fusion splicing for making permanent fiber join, mechanical splice and, most of all, optical connectors. In following chapters I introduce mathematical dependence of attenuation on the relative possition of the ends of fibers. Another aim of the work was to create an application in a suitable programming enviroment, which will be used for design of optical path.
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