Lightguide preform fabrication

Details Lightguide preform fabrication Lightguide preform fabrication

1980-08-07

1981-12-08

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

427163, 427237, C03B 3707, C03B 37075

Patent

active

043045812

ABSTRACT:
A lightguide preform (13) is fabricated by depositing and consolidating a plurality of doped silica layers (12), containing volatile germania, on the inside surface of a silica glass tube (11). The tube (11) is rotated while repeatedly traversing a hot zone therealong to shrink and collapse the tube in a final heat zone traversal. A gas mixture containing oxygen and germanium tetrachloride flow from an input gas line (23) and through the tube (11) during the shrinking traversals. The gas mixture continues to flow through at least a portion of the input gas line (23) during the final heat zone traversal.

REFERENCES:
patent: 3981707 (1976-09-01), Araujo
patent: 4087266 (1978-05-01), Irven et al.
patent: 4110093 (1978-08-01), Macedo et al.
patent: 4121919 (1978-10-01), Le Sergent et al.
patent: 4145456 (1979-03-01), Kuppers et al.
patent: 4154591 (1979-05-01), French et al.
patent: 4165224 (1979-08-01), Irven et al.
patent: 4191545 (1980-03-01), MacChesney et al.
patent: 4206968 (1980-06-01), Suganuma et al.
patent: 4217027 (1980-08-01), MacChesney et al.
Partus et al., "Lightguide Preform Manufacture", The Western Electric Engineer, vol. XXIV, No. 1, Winter 1980, pp. 39-47.
Akamatsu et al., "Fabrication of Graded-Index Fibers . . . ", Applied Physics Letters, vol. 31, No. 8, Oct. 15, 1977, pp. 515-517.

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