Method of making nitrogen-doped graded index optical waveguides

Details Method of making nitrogen-doped graded index optical waveguides Method of making nitrogen-doped graded index optical waveguides

1979-01-02

1980-05-20

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 30R, 65112, C03B 3700, C03C 308, C03C 330, C03C 1300

Patent

active

042037441

ABSTRACT:
A method of forming graded index, nitrogen-doped optical waveguides. A cylindrically-shaped porous preform comprising at least two oxides is initially formed. One of the oxides, which more readily reacts with nitrogen, has a greater concentration near the center of the preform than at the outer portion thereof. The preform is treated with a nitrogen-containing compound to form a porous body having a greater concentration of nitrogen in the central portion thereof. The porous preform is consolidated and drawn into an optical waveguide filament.

REFERENCES:
patent: 3113008 (1963-12-01), Elmer
patent: 3149946 (1964-09-01), Elmer
patent: 3823995 (1974-07-01), Carpenter
patent: 3826560 (1974-07-01), Schultz
patent: 3938974 (1976-02-01), Macedo et al.
patent: 3999835 (1976-12-01), Newns et al.
patent: 4062665 (1977-12-01), Izawa et al.
Rand et al., "Silicon Oxynitride Films on Fused Silica for Optical Waveguides", Applied Optics, vol. 11, No. 11, Nov. 1972, pp. 2482-2488.

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