Optical fibre fabrication

Details Optical fibre fabrication Optical fibre fabrication

1984-10-19

1986-07-29

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 32, 65 13, G03B 37027

Patent

active

046029265

ABSTRACT:
A rod-in-tube method of manufacturing optical fibre where the rod and the tube are fed into the heating zone of a furnace at different rates, the rod feed rate being greater than the tube feed rate. The rod is mounted relative to the tube such as to permit self-centering of the rod in the tube when the tube collapses onto the rod in the heating zone. The drawn fibre may be monitored by means of an in-line fibre core to O/D monitor and feed-back employed to drive the tube and rod feed mechanisms accordingly thereby providing precise control of the core to O/D ratio of the fibre. Very long fibre lengths may be achieved by feeding the rod into the heating zone at a greater rate than a very large mass tube billet and consecutively feeding further rods into the tube billet as the preceding rod is used up.

REFERENCES:
patent: 3711262 (1973-01-01), Reck et al.
patent: 3884550 (1975-05-01), Maurer et al.
patent: 4217123 (1980-08-01), Titchmarsh
patent: 4280827 (1981-07-01), Murphy
patent: 4289516 (1981-09-01), Krohn
patent: 4351657 (1982-09-01), Kimura
Optical Fiber Telecommunications; edited by Steward E. Miller et al, published by Academic Press Inc., Orlando, Fla., 1979, p. 272.

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