Optical fiber with low OH impurity and communication system using the optical fiber
AssigneeLucent Technologies Inc.
InventorsFred Paul Partus, Gordon Albert Thomas, Robert Michael Atkins, James William Fleming, Jr.
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Abstract
An optical fiber formed from a glass preform substantially free of OH impurities is disclosed. The optical fiber is made to be free of OH impurities by a method having the steps of introducing a moving stream of vapor mixture including at least one compound glass-forming precursor together with an oxidizing medium into a tube, while generating a hydrogen-fee isothermal plasma on an outer surface of the tube to react the mixture and produce a glassy deposit on an inner surface of the tube. The glass preform is drawn to produce the optical fiber.
Claims9
An optical fiber substantially free of OH impurities, capable of transmitting an optical signal without loss due to sub-harmonic interference by OH absorption, wherein said optical fiber is drawn from a glass preform produced according to the following modified chemical vapor deposition method:
- introducing a moving stream of vapor mixture including at least one glass-forming precursor and an oxidizing medium into a tube;
- and
- heating the tube with a substantially hydrogen-free heat source, whereby the mixture reacts and a glassy deposit is produced on an inner surface of the tube.
Dependencies are inferred from the claim text.