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Assesment of the meaning of Polarization Mode Dispersion
Červenka, Vladimír ; Rampl, Ivan (referee) ; Kyselák, Martin (advisor)
This thesis describes the most important types of distortions in fibre optics during transmission. They are divided into two main groups, linear and nonlinear. The linear phenomena consist of internal and external attenuation, different kinds of dispersions and negative effect of signal noise. The special attention is focused on polarization mode dispersion. The impact of the nonlinear phenomena on fibre optics in high date rate is discussed as well. Furthermore, the negative effects in fibre optics and their causes are deeply analyzed on results gathered from simulation of some transmission lines. There are presented many methods for counting the meaning of polarization mode dispersion, for example the theoretical model including implementation on physical layer and reducing power looses. Some examples of designing fibre optic lines are introduced along with calculation for them.
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Splicing of special optical fibers
Hlavatý, Václav ; Holík, Milan (referee) ; Mikel, Břetislav (advisor)
The aim of thesis is to design welding processes for special optical fibers. The text describes procedures of modification of the basic welding process for three types of PM fibers. For each fiber type was created specific welding process. All optimized welding processes were tested in terms of reproducibility.
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Apodization of the fibre Bragg gratings by use of phase mask UV exposition
Burian, Tomáš ; Hejátková, Edita (referee) ; Urban, František (advisor)
This thesis describes the problem of fiber gratings, focusing primarily on the use of Bragg's grids in the sensor. It describes the types of fiber mesh production, especially the method of writing with a phase mask. The next part deals with the possibilities of using apodization in fiber optic systems. It deals with the various functions that can be used to describe apodization. The following part describes the moire principle, especially the method of overlapping two phase masks with a different period.
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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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Laser transmitter with fiber
Hašek, Jaroslav ; Němeček, Jiří (referee) ; Wilfert, Otakar (advisor)
This master´s thesis deals with communication which is provided by optical devices. Optical wireless links are enforced due to high bit rate, responsibility and noise immunity. Main part of this master´s project is devoted to optical fibre, its characteristic and its usage in laser transmitter.
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Designing of a Fiber Optic Network for Connecting Blocks of Flats in Kojetín
Rumplík, Martin ; Vojáček, Dušan (referee) ; Ondrák, Viktor (advisor)
The subject of this diploma's thesis is to create a design of a fiber optic network, which will allow an access to broadband internet connection for households living in blocks of flats in Kojetín. For this purpose the best technologies will be compared by analysis and the new network topology will be designed. The investor is a civic association Cyrilek.net that provides a wireless internet at this area. The best solution will be selected on the basis of financial and technical analysis and the investment will be calculated including its return. This innovation not only give people a really fast internet connection, but also the possibility of other services such as IPTV or VoIP.
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The audit methology of optical networks
Štěpán, Petr ; Münster, Petr (referee) ; Reichert, Pavel (advisor)
This work deals with summary of optical system audit in the terms of all layer of the reference model ISO/OSI. Introduction of the work focuses on exploring issues of management networks control, the description of ISO/OSI model and explanation of the terms QoS and SLAs. The description of the optical fiber transmission follows after that. The characteristics of the waveguide and optical communication system components with regard to its reliable operation and management are analyzed. Some major types of optical networks are described. Following section contains a description of methods used in the audit, further the methods for measuring physical, connection and network layer of the reference model are discussed more thoroughly. The work also contains a partial analysis of the audit of the physical layer of the selected section of the Brno academic network optical line. Of all these methods for networks control the final audit report for the optical network with selected limits is compiled as a conclusion of the work.
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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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