Reservoir, method for producing optical fiber, and device for producing optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsShin SATO, Takemi HASEGAWA, Hirotaka SAKUMA
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Abstract
A reservoir is used in producing an optical fiber preform. A raw material containing an alkali metal element or an alkaline-earth metal element is installed in the reservoir when adding the alkali metal element or the alkaline-earth metal element to a glass pipe formed from silica-based glass by thermal diffusion. The reservoir is formed from silica-based glass in which sum of a fluorine concentration and a chlorine concentration is from 1500 ppm to 20000 ppm.
Claims8
A reservoir which is used in producing an optical fiber preform and in which a raw material containing an alkali metal element or an alkaline-earth metal element is installed when adding the alkali metal element or the alkaline-earth metal element to a glass pipe formed from silica-based glass by thermal diffusion,
- wherein the reservoir is formed from silica-based glass in which sum of a fluorine concentration and a chlorine concentration is from 1500 ppm to 20000 ppm.
Dependencies are inferred from the claim text.