Optical fiber and laser machining apparatus
AssigneeSumitomo Electric Industries, Ltd.
InventorsKeiichiro Fukuda, Takemi Hasegawa, Masaharu Mogi
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Abstract
An optical fiber has a core region and a cladding region surrounding the core region. The core region and the cladding region are made of a base material containing silica glass as a principal component. A plurality of holes extending along an axial direction are arranged at least in the cladding region. In the optical fiber, the base material has a hydroxyl mole fraction of not less than 10 ppm, or a fluorine content of not less than 0.2% by weight.
Claims9
An optical fiber for transmitting light in which a core region and a cladding region surrounding the core region are made of a base material comprising silica glass as a principal component and in which a plurality of holes extending along an axial direction are arranged at least in said cladding region,
- wherein said base material has a hydroxyl mole fraction of not less than 10 ppm, or a fluorine content of not less than 0.2% by weight.
An optical fiber for transmitting light in which a core region of a hole is surrounded by a base material comprising silica glass as a principal component to form a cladding region and in which a plurality of holes extending along an axial direction are arranged in said cladding region,
- wherein, said optical fiber supports at least one transmissible mode at a wavelength shorter than 400 nm, and said base material has a hydroxyl mole fraction of not less than 10 ppm, or a fluorine content of not less than 0.2% by weight.
Dependencies are inferred from the claim text.