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US 12,570,566 B2Granted
Optical fiber manufacturing method and apparatus
AssigneeFurukawa Electric Co., Ltd.
InventorsKazunori Mukasa, Zoltan Varallyay, Bence Nemeth, Bela Csengeri, Zsolt Puskas, Peter Szelestey, Gabor Varga
Life of this patent
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Abstract
An optical fiber manufacturing method includes: a drawing step of heating one end portion of an optical fiber preform to melt and deform the one end portion and drawing an optical fiber, wherein in the drawing step, drawing is performed while applying pressure to a melted-deformed portion that is melted and deformed.
Claims5
An optical fiber manufacturing method comprising:
- a drawing step of heating one end portion of an optical fiber preform to 2000° C. or more to melt and deform the one end portion and drawing an optical fiber, wherein
- in the drawing step, drawing is performed while applying pressure to a melted-deformed portion that is melted and deformed by the heating such that a transmission loss of the drawn optical fiber at a wavelength of 1550 nanometers is equal to or smaller than 0.15 dB/km, and drawing is performed while applying pressure of 1 MPa or more to the melted-deformed portion that is melted and deformed.
Dependencies are inferred from the claim text.