Method for building up plasma on an optical fiber preform,...

Details Method for building up plasma on an optical fiber preform,... Method for building up plasma on an optical fiber preform,...

2003-12-02

2009-12-08

Chen, Bret (Department: 1792)

Coating processes

Direct application of electrical, magnetic, wave, or...

Plasma

C427S576000, C427S578000, C427S579000, C427S163200, C427S167000, C065S391000, C065S414000

Reexamination Certificate

active

07629032

ABSTRACT:
A plasma buildup method for building up an optical fiber perform. The method includes the steps of: providing a plasma torch having an outlet nozzle adjacent to a primary perform, wherein an interaction zone is defined between the outlet nozzle and the primary preform; feeding the plasma torch with a plasma-generating gas in the presence of a silica-based material so as to deposit a buildup material on the primary preform; and introducing a reducing element into the interaction zone, the reducing element reacting to induce reduction of the nitrogen oxides produced by interaction between nitrogen and oxygen in the presence of the plasma generated by the torch.

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Patent Abstracts of Japan, vol. 1995, No. 02, Mar. 31, 1995 corresponding to JP 06 321552 A (Fujikura Ltd.) dated Nov. 22, 1994.

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