Optical fibers having crystalline material and method of making

Details Optical fibers having crystalline material and method of making Optical fibers having crystalline material and method of making

1981-10-13

1984-01-31

Fisher, Richard V.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65 311, 350 9634, 501 37, 501 40, G02B 5172, C03B 37025, C03C 330

Patent

active

044286465

ABSTRACT:
An optical fiber with a graded index crystalline core (2,3) is made by filling a tube (1) with a mixture of two salts for which the one with the higher melting point has the lower refractive index. A graded composition results from partition effects when the fused salts are slowly cooled so that solidification proceeds uniformly inwardly from the tube wall. Fiber is pulled conventionally from the reesulting preform, and later is passed through a short hot zone to convert the core into single crystal form.

REFERENCES:
patent: 3227032 (1966-01-01), Upton
patent: 4189208 (1980-02-01), Grodkiewicz et al.
patent: 4315667 (1982-02-01), Nakagome et al.

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