Method and apparatus for forming a preform for a micro-structured optical fiber
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United States of America Patent
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Sep 14, 2010
Grant Date -
May 3, 2007
app pub date -
May 30, 2003
filing date -
May 30, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An intermediate preform is formed in a process of manufacturing an optical fibre by forming a sol containing a glass precursor; pouring the sol in a mold containing a set of elongate elements; aging the sol to obtain a gel body; removing the set of elongate elements from the gel body to create a corresponding set of holes in the gel body; and removing the gel body from the mold. The method further provides imparting a motion of the set of elongate elements during aging of the sol to avoid adhesion of the gel to the elongate elements, the motion being preferably a rotation about the respective axes or an alternate translation along the respective axes. An apparatus with means for carrying out the method is also described.
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