Glass material and optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsShin SATO, Shinji ISHIKAWA, Kazuya TOKUDA
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Abstract
In a glass material, a full width at half maximum of a first sharp diffraction peak of an X-ray scattering spectrum is 5.9 nm−1 or less.
Claims5
A glass material wherein a full width at half maximum of a first sharp diffraction peak of an X-ray scattering spectrum is 5.9 nm−1 or less.
An optical fiber comprising a core and a cladding surrounding the core, wherein a value obtained by weighting, in a region of a diameter of 20 μm, a core radial distribution of a full width at half maximum of a first sharp diffraction peak of an X-ray scattering spectrum by an electric field distribution of guided light of a wavelength of 1550 nm calculated based on a refractive index profile is 5.9 nm−1 or less.
An optical fiber comprising a core including germanium and a cladding surrounding the core, wherein a value obtained by weighting, in a region of a diameter of 20 μm, a core radial distribution of a full width at half maximum of a first sharp diffraction peak of an X-ray scattering spectrum by an electric field distribution of guided light of a wavelength of 1550 nm calculated based on a refractive index profile is 7.0 nm−1 or less.
Dependencies are inferred from the claim text.