Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
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
Fisher Richard V.
Siemens Aktiengesellschaft
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