Optical fiber having improved optics and structure
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakemi Hasegawa, Eisuke Sasaoka, Masayuki Nishimura, Masashi Onishi
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Abstract
In an optical fiber comprising a core region, an inner cladding region, and an outer cladding region which extend along its fiber axis, the average refractive index n0 of core region, the average refractive index n1 of inner cladding region, and the average refractive index n2 of outer cladding region satisfying the relationship of n1<n2<n0; at least three microstructures each extending along the fiber axis and comprising an auxiliary medium having a refractive index different from that of a main medium constituting the inner cladding region are included in the inner cladding region.
Claims16
An optical fiber comprising a core region constituted by a substantially homogeneous medium;
- an inner cladding region surrounding said core region;
- and an outer cladding region, constituted by a substantially homogeneous medium, surrounding said inner cladding region;
- wherein said core region, inner cladding region, and outer cladding region are regions extending along a fiber axis and influencing optical characteristics;
- wherein an average refractive index n0 of said core region, an average refractive index n1 of said inner cladding region, and an average refractive index n2 of said outer cladding region satisfy the relationship of
- n1<n2<n0;
- and
- wherein said inner cladding region includes at least three microstructures each extending along said fiber axis and comprising an auxiliary medium having a refractive index different from that of a main medium constituting said inner cladding region.
Dependencies are inferred from the claim text.