Back to results
US 2001/0055455 A1Published application
Optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakemi Hasegawa, Eisuke Sasaoka, Masayuki Nishimura
Life of this patent
Estimating the term…
Abstract
In an optical fiber including a core region and cladding regions of not less than three layers which surround the core region in order, at least one of the cladding regions has lower mean refractive index than both adjacent regions, and at least one cladding region is provided with a plurality of sub medium regions each having a refractive index lower than a main medium constituting this cladding region.
Claims15
An optical fiber including a core region and cladding regions of not less than three layers which surround said core region in order, wherein
- at least one of said cladding regions has lower mean refractive index than both adjacent cladding regions, and at least one cladding region is provided with a plurality of sub medium regions each having a refractive index lower than a main medium constituting this cladding region.
Dependencies are inferred from the claim text.