Method and apparatus for drawing optical fibers

Details Method and apparatus for drawing optical fibers Method and apparatus for drawing optical fibers

1978-03-03

1979-01-23

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 13, 65DIG4, 219121LM, 219121L, C03B 3700

Patent

active

041359020

ABSTRACT:
A laser beam (FIG. 1; 28) is reflected from a first oscillating galvanometer controlled mirror (14) onto a second oscillating galvanometer controlled mirror (15). The laser beam is reflected from the second mirror as a pattern (29) having an annular cross section by individually controlling the amplitude and phase relationships of the oscillations of the mirrors. The annular beam is directed at a frustoconical reflector (21) which reflects the annular beam radially inward to heat a portion of a glass preform (25) positioned along the axis of the reflector to form a melt zone therein from which an optical fiber (36) is drawn.
Additionally, the amplitude of the mirror oscillations are modulated to vary the diameter of the annular beam to cause the beam to reciprocate along a portion of the length of the preform to expand the size of the melt zone.

REFERENCES:
patent: 3865564 (1975-02-01), Jaeger et al.
patent: 3965327 (1976-06-01), Ehlscheid et al.
patent: 3981705 (1976-09-01), Jaeger et al.
patent: 4012213 (1977-03-01), Haggerty et al.

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