Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1978-02-21
1979-06-12
Lindsay, Jr., Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 30R, 65DIG7, 427167, C03B 3700
Patent
active
041579062
ABSTRACT:
A method of making glass optical waveguides by the flame hydrolysis technique. Particles of glass soot produced by flame hydrolysis are deposited on the outside surface of a mandrel to form a porous preform. The soot particles closer to the mandrel have a refractive index greater than that of the soot disposed toward the outer surface of the preform. The mandrel is removed and the resultant hollow soot preform is supported in a draw furnace through which a helium-rich gas flows. The preform is heated to a temperature sufficient to cause said soot to consolidate and simultaneously permit an optical waveguide filament to be drawn therefrom.
REFERENCES:
patent: 3737292 (1978-06-01), Keck et al.
patent: 3737293 (1978-06-01), Maurer
"Preparation and Structural Characteristics of HIgh Silica, Graded Index Optical Fibers", O'Connor, et al., American Ceramic Society, vol. 55, No. 5, (1976), pp. 513-579.
"Glass Fibers for Optical Communications", French, et al., Reprint from Annual Review of Materials Science, vol. 5, 1975, pp. 373-394.
Corning Glass Works
Lindsay, Jr. Robert L.
Simmons, Jr. William J.
Zebrowski Walter S.
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