Lightguide preform fabrication

Details Lightguide preform fabrication Lightguide preform fabrication

C - Chemistry, Metallurgy

03

B

26/197, 88/97

C03B 37/07 (2006.01) C03B 37/018 (2006.01)

Patent

CA 1154579

LIGHTGUIDE PREFORM FABRICATION Abstract of the Disclosure A lightguide preform is fabricated by depositing and consolidating a plurality of doped silica layers, containing volatile germania, on the inside surface of a silica glass tube. The tube 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 and through the tube during the shrinking traversals. The gas mixture continues to flow through at least a portion of the input gas line during the final heat zone traversal.

381629

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