Method of manufacturing graded index optical fibers

Details Method of manufacturing graded index optical fibers Method of manufacturing graded index optical fibers

1979-07-02

1981-07-07

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 13, 264 11, 350 9631, 427163, C03C 2502

Patent

active

042772710

ABSTRACT:
A process is disclosed for making an optical fiber having a graded index glass core enveloped by a cladding material. The ingredients from which the core glass is to be formed are dropped into a closed tube of the cladding material which is more refractory than the core glass. The ingredients are melted to form a glassy liquid which is fined within the tube. Fining takes place at a temperature sufficiently high to cause a relatively fast reaction between the core glass and cladding, resulting in a partial mixing of the cladding and core glasses. The mixed glasses have an index of refraction intermediate that of the core and cladding at the interface. The temperature is then elevated further and the tube and glassy liquid drawn into a fiber.

REFERENCES:
patent: 4039607 (1977-08-01), Miller

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