PROCESS FOR PRODUCING A LOW-ATTENUATION OPTICAL FIBER

A process for producing a low-attenuation optical fiber comprises producing a soot core preform (23) by chemical deposition on a substrate; removing the substrate from the soot core preform (23), thereby forming a central hole (26) along the soot preform (23); drying and consolidating the soot core...

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Main Authors ADIGRAT, ANTONIO, GRIECO, STEFANO, COCCHINI, FRANCO, CARONNA, VALERIA, FERRI, GIUSEPPE
Format Patent
LanguageEnglish
French
Published 14.07.2005
Edition7
Subjects
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Abstract A process for producing a low-attenuation optical fiber comprises producing a soot core preform (23) by chemical deposition on a substrate; removing the substrate from the soot core preform (23), thereby forming a central hole (26) along the soot preform (23); drying and consolidating the soot core preform (23) in a consolidation furnace (20) to form a glass core preform (23); heating the glass preform (23) in the consolidation furnace (20) over a glass melting temperature to produce a reduction of the diameter of the central hole (26); and stretching the glass core preform (23) to completely close the central hole. L'invention concerne un procédé de production d'une fibre optique à faible atténuation, qui consiste à: produire une préforme à noyau de suie (23) par dépôt chimique sur un substrat; retirer le substrat de la préforme à noyau de suie (23) afin de former un trou central (26) dans l'axe de la préforme de suie (23); sécher et consolider la préforme de suie (23) dans un four de consolidation (20) afin de réaliser une préforme à noyau de verre (23); chauffer la préforme de verre (23) dans le four de consolidation (20) à une température supérieure à la température de fusion du verre afin de réaliser une réduction du diamètre du trou central (26); et étirer la préforme à noyau de verre (23) afin de fermer complètement le trou central.
AbstractList A process for producing a low-attenuation optical fiber comprises producing a soot core preform (23) by chemical deposition on a substrate; removing the substrate from the soot core preform (23), thereby forming a central hole (26) along the soot preform (23); drying and consolidating the soot core preform (23) in a consolidation furnace (20) to form a glass core preform (23); heating the glass preform (23) in the consolidation furnace (20) over a glass melting temperature to produce a reduction of the diameter of the central hole (26); and stretching the glass core preform (23) to completely close the central hole. L'invention concerne un procédé de production d'une fibre optique à faible atténuation, qui consiste à: produire une préforme à noyau de suie (23) par dépôt chimique sur un substrat; retirer le substrat de la préforme à noyau de suie (23) afin de former un trou central (26) dans l'axe de la préforme de suie (23); sécher et consolider la préforme de suie (23) dans un four de consolidation (20) afin de réaliser une préforme à noyau de verre (23); chauffer la préforme de verre (23) dans le four de consolidation (20) à une température supérieure à la température de fusion du verre afin de réaliser une réduction du diamètre du trou central (26); et étirer la préforme à noyau de verre (23) afin de fermer complètement le trou central.
Author ADIGRAT, ANTONIO
CARONNA, VALERIA
GRIECO, STEFANO
COCCHINI, FRANCO
FERRI, GIUSEPPE
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CARONNA, VALERIA
GRIECO, STEFANO
PIRELLI & C. S.P.A
COCCHINI, FRANCO
FERRI, GIUSEPPE
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Snippet A process for producing a low-attenuation optical fiber comprises producing a soot core preform (23) by chemical deposition on a substrate; removing the...
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SubjectTerms CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
Title PROCESS FOR PRODUCING A LOW-ATTENUATION OPTICAL FIBER
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