Apparatus for reducing volume and surface defects in silica opti

Details Apparatus for reducing volume and surface defects in silica opti Apparatus for reducing volume and surface defects in silica opti

1986-11-13

1987-10-27

Lindsay, Robert L.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 311, 65 312, 65 32, C03B 37023, C03C 2502

Patent

active

047027592

ABSTRACT:
The method allows surface defect reduction in silica optical-fibres by enriching the external layer by silica bonded carbon atoms within the silica network: SiC.SiO.sub.2. Carbon is obtained from chemical reaction directly during the drawing step.
Volume defects are reduced by rapidly cooling the fibre structure heated up to vitrous transition temperature.
The apparatus allows the method to be carried out during drawing step.

REFERENCES:
patent: 4400190 (1983-08-01), Briere
patent: 4437870 (1984-03-01), Miller
patent: 4440556 (1984-04-01), Oh et al.
patent: 4514205 (1985-04-01), Darcangelo et al.
patent: 4578098 (1986-03-01), Paek et al.
patent: 4613521 (1986-09-01), Smith

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