Alcatel Alsthom Compagnie Generale D'electricite

Patrick McKenzie

Jean-Philippe Francois

Michel Hertz

Jacques Goudeau

Henri Marc Michaud

Thierry Auvray

The fiber-drawing furnace includes a graphite tube positioned vertically, heated by induction, and subjected internally to an inert atmosphere, said tube internally defining a fiber-drawing chamber. In the furnace said graphite tube is a double-walled tube having an inner wall and an outer wall, its inner wall is porous and separates the fiber-drawing chamber from a peripheral chamber defined between the walls and subjected to a flow of inert gas which diffuses through said porous wall into said fiber-drawing chamber. Application to drawing down an optical-fiber preform.

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Conflans Cedex, NC, United States of America

Patrick McKenzie