Optički komunikacijski sustavi s valnim multipleksiranjem

scientific master's theses

• Title (english): Optical communication systems with wavelength division multiplexing
• Author: Mia Bartulica
• Mentor: Zvonimir Šipuš (mentor)
• Committee member: Boris Kviz (predsjednik povjerenstva)
• Committee member: Zvonimir Šipuš (član povjerenstva)
• Committee member: Slavko Šarić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2003, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Radio Communications
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Optički svjetlovodni komunikacijski sustavi omogućuju prijenos velike količine podataka uz male gubitke, izobličenje i preslušavanje. Sustavi koji koriste samo jednu valnu duljinu za prijenos informacije ne iskorištavaju u potpunosti mogućnosti prijenosa optičkim vlaknom. U sustavima s valnim multipleksiranjem (tzv. WDM sustavima) prijenosni spektar sastoji se od više različitih valnih duljina koje tvore komunikacijske kanale, čime se postiže znatno povećanje prijenosnog kapaciteta. U radu je dan pregled optičkih komponenata koje se koriste u WDM sustavima -, multiplekseri/demultipleksori, filtri, laseri, optička pojačala i detektori. Objašnjeni su principi izrade pojedinih komponenti, kao i njihove prednosti i mane. Obrađene su performanse sustava s obzirom na pojavu efekata koji mogu značajno utjecati na rad sustava. Ti efekti su gušenje, kromatska disperzija, polarizacijski efekti te efekti preslušavanja kao što su vlastita modulacija faze, križna modulacija faze, miješanje četiri vala, stimulirano Ramanovo i stimulirano Brillouinovo raspršenje. Opisane su metode usmjeravanje prometa i dodjeljivanje valnih duljina kao i zaštitni mehanizmi u WDM mrežama. Dan je i pregled ograničenja sustava s obzirom na parametre komponenti koje se nalaze u optičkim komunikacijskim sustavima s valnim multipleksiranjem, kao i prethodno spomenutih linearnih i nelinearnih efekata. Na osnovu tih ograničenja obrađeni su principi projektiranja optičkih mreža.

Abstract (english)

Optical fiber communication systems enable transmission of large amounts of information with low loss, small level of distortion and crosstalk. Systems that use only one wavelength for transmission of information do not fully utilise the potential of optical fiber. In wavelength division multiplexing systems transmission spectrum is composed of multiple wavelengths representing communication channels which enable significant increase in transmission capacity. This thesis gives an overview of optical components in WDM systems – multiplexers/demultiplexers, filters, lasers, optical amplifiers and detectors. Development of components as well as their advantages and disadvantages are presented. Effects which can seriously hinder adequate system performance are also given. These effects are loss, chromatic dispersion, polarization effects and crosstalk effects such as self-phase modulation, cross-phase modulation, four wave mixing, stimulated Raman and stimulated Brillouin scattering. Methods for traffic routing and wavelength assignment as well as restoration mechanisms in WDM networks have been described. System limitations taking into account WDM components parameters and previously mentioned linear and nonlinear effects are presented. Based on these limitations the principles for optical network design have been assessed.

• Keywords: optički komunikacijski sustavi; valno multipleksiranje; pasivne optičke komponente; laseri; optička pojačala; kromatska disperzija; polarizacijska disperzija; nelinearni efekti; dodjeljivanje valnih duljina
• Keywords (english): optical communication systems; wavelength division multiplexing; passive optical components; lasers; optical amplifiers; chromatic dispersion; polarization dispersion; nonlinear effects; wavelength routing
• Language: croatian
• URN:NBN: urn:nbn:hr:168:266865
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Catalog URL: http://lib.fer.hr:8080/cgi-bin/koha/catalogue/detail.pl?biblionumber=29095
• Type of resource: Text
• Extent: 183 str. ; 30 cm
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-07-04 11:58:57