Method of processing high purity low-OH vitreous silica fibers
Patent 4685945 Issued on August 11, 1987. Estimated Expiration Date: 
April 21, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 21, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for improving the transmission characteristics of optical fibers drawn from preforms made by the MCVD technique Method for optical fiber fabrication including deuterium/hydrogen exchange Patent #: 4515612 InventorApplicationNo. 06/854121 filed on 04/21/1986US Classes:65/426, Drying, dehydration, OH removal or prevention65/30.1, With chemically reactive treatment of glass preform65/900DRYING, DEHYDRATION, MINIMIZING OH GROUPSExaminersPrimary: Schor, Kenneth M.Attorney, Agent or FirmInternational ClassesC03B 37/10 (20060101)C03B 37/14 (20060101) C03C 25/60 (20060101) C03C 25/62 (20060101) G02B 6/02 (20060101) AbstractA method of achieving long-term stability in the transmission properties of high purity low-hydroxyl vitreous silica optical waveguide fibers having preexisting peroxy linkages disposed therein in which the peroxy linkages are exposed to deuterium molecules and the reaction between the deuterium molecules and the peroxy linkages to form deuteroxyl group is substantially enhanced by simultaneously or sequentially exposing the permeated fibers to a light source having an intensity of at least 10 Lambert Units and a wave length of from the short wave length absorption edge of vitreous silica up to about 650 nanometers until the absorption at 1.7 micrometers reaches saturation.Other References
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