Optical fiber manufacturing apparatus and optical fiber manufacturing method
OwnerKazuhiro YONEZAWAinventor
Life of this patent
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Abstract
An optical fiber manufacturing apparatus includes: a drawing furnace configured to heat and fuse an optical fiber preform and draw the optical fiber preform to obtain a glass fiber; a cooling device configured to cool the glass fiber; and at least one preliminary chamber provided at an upper end of the cooling device. The optical fiber manufacturing apparatus further includes: a hydrogen gas supply device configured to supply hydrogen gas into the cooling device; and an inert gas supply device configured to supply inert gas into the at least one preliminary chamber.
Claims10
An optical fiber manufacturing apparatus comprising:
- a drawing furnace configured to heat and fuse an optical fiber preform and draw the optical fiber preform to obtain a glass fiber;
- a cooling device configured to cool the glass fiber;
- at least one preliminary chamber provided at an upper end of the cooling device;
- a hydrogen gas supply device configured to supply hydrogen gas into the cooling device;
- and
- an inert gas supply device configured to supply inert gas into the at least one preliminary chamber.
An optical fiber manufacturing apparatus comprising:
- a drawing furnace configured to heat and fuse an optical fiber preform and draw the optical fiber preform to obtain a glass fiber;
- a cooling device configured to cool the glass fiber;
- a hydrogen gas supply device configured to supply hydrogen gas into the cooling device;
- and
- a hydrogen gas recovery device configured to recover the hydrogen gas supplied into the cooling device,
- wherein a hydrogen gas recovery port for recovering the hydrogen gas in the cooling device is provided in a lower portion of the cooling device.
An optical fiber manufacturing method comprising:
- heating and fusing an optical fiber preform and drawing the optical fiber preform to obtain a glass fiber;
- cooling the glass fiber by causing the glass fiber to pass through an inside of a cooling device into which hydrogen gas is supplied;
- and
- replacing, before the cooling the glass fiber, atmosphere around the glass fiber with inert gas by causing the glass fiber to pass through an inside of a preliminary chamber which is disposed at an upper end of the cooling device and into which the inert gas is supplied.
An optical fiber manufacturing method comprising:
- heating and fusing an optical fiber preform and drawing the optical fiber preform to obtain a glass fiber;
- cooling the glass fiber by causing the glass fiber to pass through an inside of a cooling device into which hydrogen gas is supplied;
- and
- recovering the hydrogen gas in the cooling device at a lower portion of the cooling device.
Dependencies are inferred from the claim text.