Estudo do processo de deposição e consolidação da preforma de silica vitrea para fibras opticas pelo metodo VAD / Study of deposition and consolidation processes of silica glass preform for optical fibers by VAD method

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The V AD - vapor phase axial deposition program in Brazil started in 1996 through the initiative of the Laboratory of Integrated Quartz Cyc1e, of The State University of Campinas, FEMIDEMA. Besides the establishment of this advanced technology in Brazil, the main objective of this program is to understand the fundamental properties of V AD made silicagermania and their correlation to the processing parameters. Therefore, a great effort has been developed in the present research in terms of technological innovations and basic understanding related to V AD processo In this sense, all phases of consolidation evolution from the preform densification, through the elimination of bubbles, until the totally transparent perforrn have been studied. Hydroxyl concentration smaller than 50 ppb has been obtained by dehydration procedure conducted under the chlorine atmosphere. The effect of temperature and chlorine flow rate as a function hydroxyl content was studied. The influence of dehydration treatment to shape the germanium profile in the preform has also been studied. The present research work was very successful to establish the fundamental knowledge to obtain a low OH, and a suitable doping profile silica-germania preform for optical fiber

ASSUNTO(S)

fibras oticas silica glass vapor deposition processos de fabricação silica vitrea optical fiber perform vapor - deposição production processes germanio

ACESSO AO ARTIGO

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