OPTICAL FIBER
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United States of America Patent
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Issued Date -
Mar 27, 2014
app pub date -
May 24, 2012
filing date -
May 27, 2011
priority date (Note) -
Abandoned
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Abstract
An optical fiber has a core region, a cladding region and at least one spacer layer disposed between the core region and the cladding region. The core region is positively doped and has a positive refractive index with respect to the glass matrix of the optical fiber. The cladding region is negatively doped and has a refractive index of at most zero with respect to the glass matrix. The numerical aperture of the optical fiber is composed of variable proportions of the positively doped core region and the negatively doped cladding region and results from the refractive indices of both regions.
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