Automation and monitoring for refractive index profile contrrol of VAD preforms for optical fibers / Automação e monitoramento para o controle do perfil de indice de refração de preformas VAD para fibras opticas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Fabrication of preforms for special optical fiber using VAD, "Vapor-phase Axial Deposition" tecnique has been in progress at the LIQC, UNlCAMP/FEM. ln this method, the processing parameters must be accurately controlled, particularly the refractive index profile determined by the germanium doping profile, which controls de data transmission characteristics in optical fiber. ln the present research, a study of VAD deposition parameters on the germanium doping profile of nanostructured preform was conducted. The quantitative analysis of germanium concentration was performed by X-ray fluorescence spectrometry. An automation system using LabVIEW was developed for data acquisition and analysis ofthe deposition surface profile of the preform and on-line determination of the germanium doping profile. As a result, the present development allowed the manufacture of various types of doping profile, such as parabolic and triangular shapes. Moreover, the determination of the type of fiber to be producedand its uniformity control during the process, as well as the reproduction of a specific doping profile were made possible using this system. Applications for industrial use becomes strategic

ASSUNTO(S)

automação optical fibers vapor-deposição automation fibras oticas vapor-phase deposition

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