Alcatel Fibres Optiques

Helene Jameron

Jean-Florent Campion

Patrick Humbert

Pierre Rebreyend

Pascal Mazabraud

Jacques Goudeau

The method of manufacturing a preform having a supporting core by effecting successive passes with a plasma torch while material is being supplied, and by effecting at least one glazing step with the plasma torch and without material being supplied includes:

Method of separating and glazing an optical fiber preform

The invention relates to a method of performing surface treatment on a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, the installation including at least rotation means having a horizontal axis of rotation and two mounting points between which the supporting core of the preform to be manufactured or built up is mounted, plasma-torch and material-supply means disposed radially relative to the supporting core and mounted to move in axial translation relative to and parallel to the supporting core so as to make the preform around the supporting core, the preform being manufactured or built up by effecting successive passes with the plasma torch while material is being supplied. According to the invention, after the plasma torch passes with material being supplied have been effected, and/or after the preform has been separated, at least one pass is effected automatically and without cooling the preform, which pass is effected with a plasma torch and without material being supplied so as sinter deposits comprising condensation soot.

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Andresy, France

Helene Jameron