Process for fabricating optical fiber

Details Process for fabricating optical fiber Process for fabricating optical fiber

1986-06-24

1988-09-20

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 2, 65 13, C03B 37023

Patent

active

047723033

ABSTRACT:
A process for fabricating an optical fiber by inner-lining a quartz tube with synthetic glass having a refractive index higher than the quartz tube and collapsing it while wire-drawing it via a wire-drawing furnace, comprising the steps of inner-lining the synthetic glass in the quartz tube so that the value of the inner diameter/the outer diameter of the quartz tube is 0.85 or less, sealing one end of the quartz tube to form a sealed end, then holding the quartz tube in a wire-drawing furnace, and wire-drawing it from the sealed end while holding the internal pressure of the quartz tube in negative pressure. Thus, the process prevents moisture from the exterior from mixing and allows the wire-drawing and collapsing steps to be performed stably and reliably.

REFERENCES:
patent: 4155733 (1979-05-01), Sandbank et al.
patent: 4157906 (1979-06-01), Bailey
patent: 4277270 (1981-07-01), Krohn
patent: 4389229 (1983-06-01), Jang et al.
patent: 4486212 (1984-12-01), Berkey
patent: 4636235 (1987-01-01), Glessner et al.
patent: 4636236 (1987-01-01), Glessner et al.

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