Surface treatments for optical fibre preforms

Details Surface treatments for optical fibre preforms Surface treatments for optical fibre preforms

C - Chemistry, Metallurgy

03

C

88/97, 204/96.14

C03C 13/04 (2006.01) C03B 37/018 (2006.01) C03C 25/22 (2006.01)

Patent

CA 1321771

ABSTRACT Halide fibres are protected by coatings up to 2µm thick of chalcogenide glasses, eg glasses based on compounds of S, Se or Te with Ge or As. The coatings are deposited on the fibre preform by ion deposition sputtering. Preferably the preform is etched by directing a stream of inert ions at it. Most suitably the etching immediately precedes the coating.

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