Optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsHirotaka SAKUMA, Yuki KAWAGUCHI, Shin SATO
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Abstract
This optical fiber comprises a silica-based glass. The optical fiber is equipped with: a core containing chlorine and one or more elements from among an alkali metal element group comprising alkali metal elements and alkali earth metal elements; and cladding that surrounds the core and has a lower refractive index than the refractive index of the core. The average concentration CA of the alkali metal element group throughout the core and the average concentration CC of chlorine throughout the core satisfy CC/CA>1.0.
Claims7
An optical fiber made of silica-based glass, the optical fiber comprising:
- a core containing chlorine and one or more elements among an alkali metal element group consisting of alkali metal elements and alkaline-earth metal elements;
- and
- a cladding surrounding the core and having a refractive index lower than a refractive index of the core,
- wherein an average concentration CA of the alkali metal element group in the entire core and an average concentration CC of chlorine in the entire core satisfy CC/CA>1.0.
Dependencies are inferred from the claim text.