Surface treatments for optical fibre preforms

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

1987-10-13

1990-11-27

Simmons, David

Glass manufacturing

Processes

Forming product or preform from molten glass

156643, 65 31, 65DIG16, 20419211, 20419220, 2041923, 20419216, 427 42, 427307, 501 40, 501904, C03C 2502

Patent

active

049733451

ABSTRACT:
Halide fibres are protected by coatings up to 2 .mu.m 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 ethced by directing a stream of inert ions at it. Most suitably the etching immediately precedes the coating.

REFERENCES:
patent: 4049413 (1977-09-01), French
patent: 4381141 (1983-04-01), Sakuragi et al.
patent: 4425146 (1984-01-01), Izawa et al.
patent: 4473599 (1984-09-01), Elion
patent: 4508554 (1985-04-01), Berrwald et al.
patent: 4643752 (1987-02-01), Howard et al.
patent: 4652290 (1987-03-01), Cho et al.
patent: 4670033 (1987-06-01), Miura
patent: 4737379 (1988-04-01), Hudgens et al.
Chemical Abstracts, vol. 99, No. 20, 14th Nov. 1983, p. 272, Abstract 162918b, Columbus, Ohio, U.S.; & JP-A-58 95 265 (Nippon Telegraph and Telephone Public Corp.).
Chemical Abstracts, vol. 95, No. 16, Oct. 1981, p. 278, Abstract 137155k, Columbus, Ohio, U.S.; & JP-A-81 50 307 (Furukawa Electric).

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