Method for manufacturing a primary preform for optical fibres
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United States of America Patent
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Dec 6, 2016
Grant Date -
Aug 21, 2014
app pub date -
Apr 29, 2014
filing date -
Jul 30, 2009
priority date (Note) -
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Abstract
A method for manufacturing a primary preform for optical fibers including surrounding at least part of a hollow substrate tube with a furnace set at a temperature T0, supplying doped or undoped gases to the inside of the tube, creating a reaction zone to promote deposition, and moving the zone back and forth along the length of the tube between to form at least one preform layer, wherein the temperature of the furnace is varied linearly as a function of the thickness of the at least one preform layer to compensate for temperature increases of the tube during deposition.
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