PROJECTE DE FI DE CARRERA - TU Wien › files › pub-et_10065.pdf · 2006-03-27 · PROJECTE DE FI...

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PROJECTE DE FI DE CARRERA TÍTOL DEL PFC: Measurement of waveguiding parameters in infrared optical fibers TITULACIÓ: Enginyeria de Telecomunicació (segon cicle) AUTOR: David Fernández Santiago DIRECTOR: Franz Fidler, Robert Felkel, Martin Pfennigbauer and Walter R. Leeb DATA: 29 de juliol de 2005

Transcript of PROJECTE DE FI DE CARRERA - TU Wien › files › pub-et_10065.pdf · 2006-03-27 · PROJECTE DE FI...

Page 1: PROJECTE DE FI DE CARRERA - TU Wien › files › pub-et_10065.pdf · 2006-03-27 · PROJECTE DE FI DE CARRERA TÍTOL DEL PFC: Measurement of waveguiding parameters in infrared optical

PROJECTE DE FI DE CARRERA TÍTOL DEL PFC: Measurement of waveguiding parameters in infrared optical fibers TITULACIÓ: Enginyeria de Telecomunicació (segon cicle) AUTOR: David Fernández Santiago DIRECTOR: Franz Fidler, Robert Felkel, Martin Pfennigbauer and Walter R. Leeb DATA: 29 de juliol de 2005

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Títol: Measurement of waveguiding parameters in infrared optical fibers Autor: David Fernández Santiago Director: Franz Fidler, Robert Felkel, Martin Pfennigbauer and Walter R. Leeb Data: 29 de juliol de 2005 Resum Degut a la seva aplicació en sistemes de comunicació terrestre, les fibres òptiques han estat intensament investigades i desenvolupades al rang de longitud d’ona des dels 0,4 µm als 1,7 µm. Tanmateix, moltes aplicacions mèdiques, astronòmiques o de sensibilitat remota demanen un rang d’operació per sobre d’1,7 µm. Per aquesta raó les fibres de l’infraroig que transmeten llum a longituds d’ona més grans que 2 µm en aplicacions de comunicació i científiques per distàncies curtes esdevenen més importants. L’objectiu d’aquest projecte és la determinació dels paràmetres de guia-ones i la definició dels mètodes de mesura per fibres òptiques a l’infraroig. També descriu els principis en els que els tests experimentals, usats per la mesura d’importants paràmetres de fibra òptica, es basen. Degut al fet que els sistemes de fibra òptica han evolucionat, el nombre de paràmetres importants per mesurar ha augmentat i els mètodes de mesura han esdevingut més complexes. Per tant és important caracteritzar-los apropiadament i considerar cada avantatge i desavantatge que prové de cada tècnica de mesura. Els mètodes de mesura descrits en aquest document s’escullen considerant la seva complexitat i l’equipament disponible al laboratori de l’Institut d’Enginyeria de Comunicacions i Ràdio-Freqüència (Universitat Tecnològica de Viena). Els paràmetres de guia-ones que descric i mesuro en aquest document són l’apertura numèrica, la freqüència normalitzada, el radi de camp modal, la birrefringència i la longitud de beat.

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Title: Measurement of waveguiding parameters in infrared optical fibers

Author: David Fernández Santiago

Director: Franz Fidler, Robert Felkel, Martin Pfennigbauer and Walter R. Leeb

Date: July 29th, 2005 Overview Due to their application in terrestrial communication systems, optical fibers have been intensively researched and developed in the wavelength range from 0.4 µm to 1.7 µm. Many medical, astronomical or remote sensing applications, however, ask for an operational range above 1.7 µm. Therefore, infrared fibers which transmit light at wavelengths greater than 2 µm in communication and scientific applications for short distances become more and more important. The outline of this thesis is the determination of waveguiding parameters and the definition of measurement methods for infrared optical fibers. It also describes the principles on which the experimental tests, used for the measurement of important fiber parameters, are based. Due to the fact that fiber optic systems have evolved, the number of important parameters to measure has increased and the measurement methods have become more complex. Therefore, it is important to characterize them properly and to take into consideration every advantage and disadvantage that comes along with different measurement techniques. The measurement methods described in this document are chosen taking into consideration their complexity and the available laboratory equipment of the Institute of Communications and Radio-Frequency Engineering (Vienna University of Technology). The waveguiding parameters that I describe and measure in this document are the numerical aperture, the normalized frequency, the mode field radius, the birefringence, and the beat length.

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Page 46: PROJECTE DE FI DE CARRERA - TU Wien › files › pub-et_10065.pdf · 2006-03-27 · PROJECTE DE FI DE CARRERA TÍTOL DEL PFC: Measurement of waveguiding parameters in infrared optical

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