Method for manufacturing a preform as well as a method for forming optical fibres from such a preform
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United States of America Patent
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Apr 26, 2011
Grant Date -
Jul 9, 2009
app pub date -
Apr 25, 2008
filing date -
Apr 27, 2007
priority date (Note) -
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Abstract
A method for manufacturing a preform for optical fibers by means of a vapor deposition process, wherein plasma conditions are created and wherein the plasma is moved back and forth along the longitudinal axis of the hollow substrate tube between a reversal point near the supply side and a reversal point near the discharge side of the hollow substrate tube, so that the location where the soot deposition associated with one phase takes place is axially spaced from the location where the soot deposition associated with the other phase(s) takes place.
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