Method for the manufacture of a multi-channel fiber optical wave

Details Method for the manufacture of a multi-channel fiber optical wave Method for the manufacture of a multi-channel fiber optical wave

1980-02-25

1981-07-07

Fisher, Richard V.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 31, 427163, 427237, 427264, 427266, C03B 37075

Patent

active

042772729

ABSTRACT:
A method for forming a preform which is subsequently drawn into a multi-channel fiber optical wave guide having a plurality of wave guide cores embedded in a cladding material, characterized by providing a quartz glass tube having an inner surface covered by a layer of cladding material, which in turn is covered by a layer of core material, removing strips of the core material to form parallel, symmetrically disposed strip-like portions of the core material, and heating the tube to cause the collapsing of the tube into the preform with buckling in the areas free of the strip-like portions of core material so that heat of the strip-like portions of core material become completely surrounded by cladding material and then subsequently drawing the preform into the optical fiber.

REFERENCES:
patent: 4049413 (1977-09-01), French
patent: 4229197 (1980-10-01), Streng

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