05318612 is referenced by 11 patents and cites 25 patents.

According to the invention, a hollow silica bar (2) is produced with a thick wall and high geometrical precision, the bar is then cleaned and an oven (24) is used able to heat the silica to its melting temperature and with respect to which the bar is moved so as to embody an external thermic glazing of the bar, an internal vapor phase depositing a vitreous coating in this bar by making circulate inside it a mixture of suitable gaseous constituents, this coating being intended for the subsequent formation of the core of the optical fibers, and an area contraction of the bar, the various temperatures of the bar required to embody these operations being obtained by varying the temperature of the oven or speed of the bar with respect to the oven.

Title
Method for producing optical fiber preforms and device to implement said method
Application Number
7/897315
Publication Number
5318612
Application Date
June 11, 1992
Publication Date
June 7, 1994
Inventor
Isabelle Hardy
Louannec
FR
Georges Le Noane
Trogastel
FR
Agent
Pearne Gordon McCoy & Granger
Assignee
France Telecom Etablissement Autonome de Droit Public
FR
IPC
C03B 37/025
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