Method for making index-profiled optical device

Details Method for making index-profiled optical device Method for making index-profiled optical device

1985-11-04

1986-11-04

Lindsay, Robert

Glass manufacturing

Processes

Forming product or preform from molten glass

65 311, 65 13, 65DIG16, 427163, C03C 2502, C03B 37023

Patent

active

046208615

ABSTRACT:
Glass preforms for optical fibers or the like having refractive index profiles which vary in stepped or graded fashion across the preform, are made from porous glass preforms by introducing a first dopant into the porous preform during manufacture, partially sintering the preform to selectively modify the internal surface area thereof, introducing a second vapor-infusible dopant into the selectively sintered preform to cause selective doping of the porous glass, and then consolidating the resulting doped preform to clear glass.

REFERENCES:
patent: 3823995 (1974-07-01), Carpenter
patent: 4203743 (1980-05-01), Saganuma et al.
"Effects of Additives on Sintering of CaF.sub.2, Haroun et al, Journal of the American Ceramic Society, vol. 54, #12, 7/1971, p. 640.

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