Manufacture of optical fibre preforms

Details Manufacture of optical fibre preforms Manufacture of optical fibre preforms

1986-03-26

1987-12-29

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 312, 65 182, 65 183, 65 301, C03B 37023

Patent

active

047158751

ABSTRACT:
Manufacture of optical fibre preforms. A material such as Si, Ge and B.sub.2 O.sub.3 is evaporated in vacuo into a silica tube and is made to condense therein as a viscous liquid which is then oxidized. The operation may be repeated several times with different materials. In this way the tube is clad from within in such a way that the optical index of refraction increases from the periphery inwards. Upon completion of the cladding the tube is collapsed into a rod which is then used for drawing optical fibres.

REFERENCES:
patent: 3862020 (1975-01-01), Woerner et al.
patent: 3971645 (1976-07-01), Bachmann
patent: 4039607 (1977-08-01), Miller
patent: 4067709 (1978-01-01), Stanton
patent: 4417911 (1983-11-01), Cundy et al.

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