Browsing by Author "Kaya, Gürkan"

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    Study of the scattering based losses in passive optical networks
    (Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2015-05) Kaya, Gürkan; Özharar, Sarper
    In recent years, rapid development of wireless data transmission has required that researchers and engineers who study data transmission and network topology, should focus on controlling the increased data traffic and dealing with the related challenges. Both increased number of users in data communications and the need of applications with higher capacity due to widely used internet, require broader bandwidth. Since such increase in data traffic service providers should enhance service quality provided for end users in parallel with such growth. Optical fiber has become one of the essential elements of communication systems in recent years because of its high capacity for transferring the light at different wavelengths and having high performance together with large bandwidth in data transmission thanks to high carrier frequency of light. Especially large bandwidth of optical fiber has enabled a great number of users communicating on the same fiber cable simultaneously and resulted in a relief for traffic on the lines by providing high performance in data communication. In data communication, long distance Passive Optical Networks will be crucial for optical fiber access networks in the future in terms of increasing bandwidth and reducing unit line cost. During transmission throughout the optical fiber, a reduction in signal power occurs due to scattering mechanisms such as Rayleigh scattering resulting from inhomogeneity of fiber material and interaction with molecular models (Raman scattering) or acoustic waves resulting from thermal effects (Brillouin scattering). In this thesis study, use of Passive Optical Network (PON) in data communication networks was discussed and several loss mechanisms are investigated. The main aim was to understand the signal reduction mechanisms so that some solutions can be offered as a future work.