Coating for optical fibers and method therefor
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United States of America Patent
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Sep 16, 2003
Grant Date -
May 2, 2002
app pub date -
Oct 9, 2001
filing date -
Oct 30, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved coating for optical fibers and a method for applying the improved coating are described. The present invention is a dimensionally precise and uniform coating with low-porosity. The improved coating is applied via sputtering within a vacuum chamber. Environmental conditions are monitored within a cylindrical magnetron during sputtering. Sputtering is adjusted or temporarily ceased when environmental conditions approach a damage threshold. Sputtered particles within a plasma cloud are dimensionally similar and adhere to an optical fiber in a volume efficient arrangement forming a more precise, denser, and more adherent coating. Embodiments of the present invention provide improved pull strength by compressively constraining the optical fiber within the coating and by closing microcracks.
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