Optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakemi Hasegawa, Eisuke Sasaoka, Masayuki Nishimura, Masashi Onishi
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Abstract
In an optical fiber composed of a core region and a cladding region surrounding the core region and having a plurality of regions made of sub mediums having refractive indices different from a refractive index of a main medium disposed in a main medium constituting this cladding region, these regions made of the sub mediums are arranged in one given or a plurality of a given circular annular regions and the centers of the regions made of the sub mediums in respective circular annular regions are arranged on the same circumference centered at the center of the core.
Claims14
An optical fiber composed of a core and a cladding surrounding the core, where a given cross section of said cladding includes a plurality of regions made of sub mediums having refractive indices different from the refractive index of the main medium constituting said cladding, wherein
- said regions made of said sub mediums are arranged in one given or a plurality of given circular annular regions and the centers of said regions made of said sub mediums in each of said circular annular regions are arranged on the same circumference centered at the center of said core and having a diameter predetermined for each of said circular annular regions.
An optical fiber composed of a core and a cladding surrounding said core, where a given cross-section of said cladding includes a plurality of regions made of sub mediums having refractive indices different from the refractive index of the main medium constituting said cladding, wherein
- said optical fiber has at least two cladding regions, and structural densities of the region made of said sub mediums are different between said two cladding regions.
Dependencies are inferred from the claim text.