Process for producing a low polarization mode dispersion optical fiber
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United States of America Patent
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Dec 4, 2012
Grant Date -
Jan 31, 2008
app pub date -
Aug 29, 2003
filing date -
Aug 29, 2003
priority date (Note) -
Expired
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Abstract
In a process for producing a low polarization mode dispersion optical fiber, which comprises the steps of drawing a glass preform into an optical fiber and of spinning, during drawing, the optical fiber about an optical fiber axis, the spinning is imparted according to a bidirectional and substantially trapezoidal spin function, which includes zones (P) of substantially constant amplitude (plateau) and zones of transition (T) where inversion of the spin direction takes place, wherein the extension (p) of the zones of substantially constant amplitude is greater than the extension (t) of the zones of transition, and the number of inversions of the direction of spin in a length of fiber of 20 m is at most two.
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