Method of producing optical fibers for telecommunications

Details Method of producing optical fibers for telecommunications Method of producing optical fibers for telecommunications

1978-12-26

1980-12-30

Levy, Stewart J.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 2, 65 30E, 350 9631, 350 9634, G02B 514, C03C 2502

Patent

active

042421179

ABSTRACT:
When producing a glass fiber, having a graded refractive index profile, by means of the double crucible method, the initial materials being core and cladding glass compositions having mutually different alkali ions, a profile is usually obtained which greatly deviates from the desired parabolic form. The invention furnishes the possibility of approximating this parabolic form very closely. This is attained by a partial substitution of the core alkali ion by the cladding alkali ion.

REFERENCES:
patent: 3858964 (1975-01-01), Piesslinger et al.
patent: 3877783 (1975-04-01), Matsumura et al.
patent: 3941474 (1976-03-01), Kitano et al.
patent: 4094689 (1978-06-01), van Ass et al.
J. P. Lacharme article in Silicates Industriels 1976-3, pp. 169-175.
French et al., "Refractive Index Changes Produced in Glass by Ion Exchange" in Ceramic Bulletin vol. 49, No. 11, Nov. 1970.

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