Method of making large diameter optical waveguide preforms

Details Method of making large diameter optical waveguide preforms Method of making large diameter optical waveguide preforms

B - Operations, Transporting

29

D

26/197, 88/97

B29D 11/00 (2006.01) C03B 37/018 (2006.01)

Patent

CA 1128739

Sarkar ? METHOD OF MAKING LARGE DIAMETER OPTICAL WAVEGUIDE PREFORMS Abstract of the Disclosure A glass optical waveguide filament preform is prepared by chemical reaction of vapor ingredients within a glass bait tube. As the reactants flow through the bait tube, a hot zone traverses the tube to cause the deposition of sooty reaction products in the region of the hot zone. A baffle tube extends into that end of the bait tube into which the reactants flow. The baffle tube, which traverses the bait tube along with the burner, ends just short of the hot zone so that no soot is deposited thereon. A gas flowing from the baffle tube creates a gaseous mandrel which confines the flow of reactant vapors to an annular channel adjacent the bait tube wall in the hot zone, thereby increasing deposition rate and efficiency.

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