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US 6,786,991 B1Granted
Method for manufacturing preforms for polymer optical fibers
AssigneeDeutsche Telekom AG
InventorWalter Heitmann
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Abstract
A method for manufacturing preforms for polymer optical fibers having an index of refraction that is variable over the radius, in which a core of preform material is coated with coating material for forming the preform until a predefinable diameter is reached, the refractive index of the coating material being varied in conformance with a predefinable profile along the radius of the emerging preform.
Claims22
A method for manufacturing a preform material for polymer optical fibers having a refractive index variable over a radius, comprising:
- coating with a coating material a core of the preform material for forming the preform material until a predefinable diameter is reached;
- and
- successively varying a refractive index of the coating material in conformance with a predefinable profile along the radius of an emerging preform;
- wherein the coating step includes coiling at least one film of the coating material on the core of the preform material, while continuously fusing with the core of the preform material until the predefinable diameter is reached, the refractive index of the at least one film being varied with a length.
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Dependencies are inferred from the claim text.