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US 4,253,863 AGranted
Apparatus for mass producing fiber optic preforms and optic fibers
AssigneeInternational Telephone and Telegraph Corporation
InventorRama Iyengar
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Abstract
A large plurality of fiber optic preforms are manufactured by chemically vapor depositing the fiber optic glass constituents on the exterior surface of electrically heatable mandrels. A corresponding plurality of mandrels are located relative to a common source of materials for chemical vapor deposition thereon. A substantial savings in materials cost, manufacturing time and greater uniformity between the individual preforms is thereby accomplished.
Claims10
Apparatus for manufacturing an optical fiber preform, comprising:
- at least one deposition substrate formed of an electrical resistant material;
- means for passing an electrical current through said substrate whereby said substrate is heated over its entire length;
- enclosure means for receiving said substrate and enclosing it from atmosphere;
- inlet means for introducing glass-forming materials in vapor form into the enclosure means;
- exhaust means for removing decomposition by-products from the enclosure means;
- and
- a porous member disposed about said substrate and in the path of said vapor between said inlet means and said substrate, whereby the glass-forming materials in vapor form pass through the porous member prior to contacting the surface of the substrate for forming glass on said heated deposition substrate.
4 more elements
Dependencies are inferred from the claim text.