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Measurement of the fiber optical transport links
Ambrož, Jan ; Škorpil, Vladislav (referee) ; Reichert, Pavel (advisor)
This thesis deals with the measurement of optical transport links. In particular, the measurement of attenuation, chromatic and polarization mode dispersion. Specic me- asurement systems using a WDM and passive optical networks. Within each chapter are listed the causes and eects restrictive factors and methods of measurement. In chapter Attenuation measurements are described radiation and material loss as the main causes of depression. Methods whitch are described two lengths, insert loss and reectometri. Chromatic dispersion at dierent speeds of various wavelengths limits systems with high transfer rate. Methods of measuring the phase shift, dierential phase shift, pulse time delay and interference. Polarization mode dispersion is a random phenomenon caused double refraction, must be measured after completion of the route. Scanning wavelen- gth, traditional and general interference, reectometri and the polarimetric are methods of measurement. It described the measurement of WDM systems in three stages of its build. In brief PON networks are presented, with the specicities of the measurement over splitter. Most chapters are supplemented by the results and conclusions of practical measurements. At the end of the work are given by the two standards deal with the measurement of optical transport links.
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Design of FTTH network
Šifta, Radim ; Reichert, Pavel (referee) ; Filka, Miloslav (advisor)
The aim of this thesis is to bring reader the issue of FTTH optical access network design. The thesis is divided into several basic parts. At the beginning of the thesis is outlined comparison with other optical access networks. In the next chapter are discussed the basic solutions, used architectures, topologies, and their comparison. The following chapter deals with the passive elements of the distribution network, their division and using. Next chapter is focused on installation technologies of distribution infrastructure, especially on microducting technology. Penultimate chapter is focused on the video services distributioning. The final part of the thesis consists of three designed models of the different architecture for the fictional village of "Světlokosy". There is an analysis of the individual variations in technological and economic terms. Simultaneously, investment costs of the proposed models are compared and their overall comparison and evaluation.
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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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Influence of the frame size on splitting ratio in the passive optical networks XG-PON
Kočí, Lukáš ; Horváth, Tomáš (referee) ; Münster, Petr (advisor)
The diploma thesis deals with the theoretical definition of passive optical networks, furthermore the description of methods of channel bundling in passive optical networks and the coexistence and migration between standards. The main essence of this work is the XG-PON (10-Gigabit-capable Passive Optical Network) standard. This standard is generally defined along with a description of the physical layer. The transport layer is detailed analysis. There is a description of conditions, under which the Optical Network Unit pass through, when is activated. Additionally, this diploma thesis focuses on the processes of connecting Optical Network Units to the Passive Optical Networks and the timing relationships between Optical Network Units and Optical Line Terminal. The simulations demonstrate that as the number of simultaneous connections to Optical Network Unit increase, longer wait time for each additional connection becomes. This also solves the collision conditions, that might arise in communication and the equalization delay. Finally, the diploma thesis deals with the influence of a refractive index on timing relationships.
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Design, development and measurement of optical access networks
Ambrož, Jan ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
The work deals with the possibilities of realization of optical access networks. They are introduced to FTTx optical access, including their specifications and differences. The document was largely devoted to passive and active optical networks. These two different technological approaches are explained and compared. Are presented technical solutions of routes - traditional options for laying underground or into the air, but also as an alternative microtubing. Mentioned are also the active network technology. The work also included the issue of measurement of optical access networks. They are illuminated important transmission parameters and methods for their measurement. The whole work is directed to the full FTTH network design according to the standard GEPON. In designing the use of theoretical information contained in each chapter. It does the form of technical documentation in accordance with the procedures used in practice, contains drawings, specific technical solutions and a detailed budget price. The design was verified by attenuation of balance. Finally there are the results of simulations of the proposed network in OptiSystem7.
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Optimization and parameter measurement of PON network FTTX
Černý, Michal ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
Práce rozebírá současný vývoj na poli pasivních optických sítí a jednotlivé generace přenosových standardů. Podrobněji se zabývá parametry ODN, metodami jejich měření a volbou potřebných měření v praxi. Hlavní část práce je zaměřena na měření pasivního WDM prvku, kde je provedena analýza vstupů a výstupů, měření vložného útlumu a přelechů podle ORL na provozních vlnových délkách.
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Methodology for designing PON networks
Dallal, Anas Omar ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
Cílem této práce je analyzovat současný stav přístupových optických sítí,a hlouběji prozkoumat PON metodiku a návrh sítě. Navrhnul jsem síť založenou na konceptu FTTH pro 90 rodinných domů ovládané z centrální stanice vzdálené 20 km. Zabýval jsem se problémy při návrhu FTTH, konkrétně pasivní optickou sítí. Dále jsem se zabýval ATM-PON a Ethernet PON (EPON), které jsou založeny na společné síťové architektuře, PON, ale používají jiné přenosové technologie na podporu integrovaných služeb a jiné protokoly. Po zadání (optimálního) síťového řešení, které se hodí pro nabídku Triple-Play služeb. Dále budu popisovat, jak fungují síťová propojení a také budou popsány metody měření a testování navržené sítě "po aktivaci a nastavení sítě" a "před aktivací síťových služeb ". Při měření jsem také používal OTDR a prakticky ověřil charakteristiku linky. V práci je také naznačeno monitorování optické sítě.
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Design of Passive Optical Network
Asensi Pla, Juan Salvador ; Reichert, Pavel (advisor)
El constante incremento en la demanda de servicios de banda ancha y el consecuente aumento del volumen de tráfico que se genera en nuestras redes de comunicaciones, han motivado la necesidad de implementar redes de nueva generación en nuestros territorios. El presente proyecto final de carrera tiene como objetivo explicar el diseno y la planificación de una red pasiva de fibra óptica (PON). La idea principal de este proyecto es construir un entorno ficticio que nos permitirá profundizar en detalle en las redes FTTx y decidir cuál es la opción más optima para este entorno. Para hacer esto posible, en primer lugar se va a hablar sobre el elemento principal de estas redes, la fibra óptica, para conocer con detalle sus principios de funcionamiento y sus características más importantes. La parte teórica seguirá con la definición de las redes FTTx y las configuraciones punto a punto y punto a multipunto, para pasar a hablar detenidamente sobre las redes PON y concluir cual de sus tecnologías será la más optima hoy en día. Por último, entraremos en la parte práctica en la que se elegirá un software de simulación que se ajuste a los requisitos de diseno, se realizará el diseno de la red óptica pasiva y se obtendrán los resultados de simulación que justifiquen que la red es viable y puede ser implementada en un caso real.
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Wide-band FTTx Networks Terminal in WDM - PON architecture
Bobkovič, Peter ; Reichert, Pavel (referee) ; Filka, Miloslav (advisor)
This masters thesis is focusing on the issue of passive optic access networks. It is dealing with the limiting factors for broadband connections, especially attenuation of fibre optics and dispersion. It is also dealing with most commonly used standards of passive optic networks. It clarifies the issue of wavelength-division multiplexing, its advantages and disadvantages, used standards, various types of components for the WDM-networks, their characteristics, application etc. In the practical part of the work you can find the measuring and diagnostics of the passive optic network EPON. It contains measuring by the direct method OLTS, measuring by the Pon Power Meter and optic reflectometer OTDR. At the end I am dealing with the measuring of splitter in the rate of 1:16.
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Measuring methods of key parameters in optical networks
Balon, Jiří ; Reichert, Pavel (referee) ; Tejkal, Vladimír (advisor)
The main goal of the master’s thesis was to familiarize with optical networks dilemma and its measuring during fabrication. The whole thesis is divided into several parts where the first part deals with optic fiber dilemma. It describes its kinds, properties and also suggests a basic principle of optic signal dispersion using these fibers. It describes also optical network FTTx architecture (Fiber To The x). The second part of the thesis focuses on methods of measuring key parameters of optical networks. Is brings out the methods of measuring optical loss and dispersive influences. The last and final part in focused on creating a methodical manual for measuring these networks during its fabrication and verifying measuring methods stated in the theoretical part inside a real network. Measuring was implemented on an optical network of Masaryk University in Brno.
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