Splicing aged optical fibers

Details Splicing aged optical fibers Splicing aged optical fibers

G - Physics

02

B

G02B 6/25 (2006.01) G02B 6/255 (2006.01)

Patent

CA 2164098

For improving mechanical characteristics of a segment of an aged optical glass fiber, the segment is retained between clamps, e.g. in a conventional splicing machine. Then the segment is heated to a high temperature in the vicinity of the softening temperature or melt temperature of the glass material of the fiber by means of an infrared light beam from a carbon dioxide laser or by an electric arc generated between the welding electrodes. In particular, the tensile strength is increased considerably by this procedure, what allows that the heated segment can be handled and exposed to the operative steps required for splicing the fiber to another optical fiber. Then also old fibers arranged in the ground can be repaired and spliced, and it is not necessary to replace whole lengths of old fibers.

Afin d'améliorer les caractéristiques mécaniques d'un segment d'une fibre optique vieillie (1), on fixe ledit segment entre des pinces (3) dans, par exemple, une machine de raccordement classique. On réchauffe ensuite le segment à une température élevée proche de la température de ramollissement ou de fusion du matériau vitreux de la fibre au moyen d'un faisceau lumineux infrarouge provenant d'un laser au gaz carbonique (11) ou au moyen d'un arc électrique généré entre les électrodes de soudure (23). Ce procédé permet, en particulier, d'améliorer la résistance à la traction et, de ce fait, le segment réchauffé peut être manipulé et soumis aux étapes nécessaires de raccordement de la fibre (1) à une autre fibre optique. On peut également réparer et remplacer des fibres anciennes situées dans le sol et il n'est pas nécessaire de remplacer des longueurs entières de fibres vieillies.

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