专利名称：Method for the manufacture of preforms
for optical fibers by powder deposition
发明人：Macchesney, John Burnette,Stockert,
Thomas Edward,Wisk, Patrick William,Yan,Man Fei
申请号：EP04009550.7申请日：20040422公开号：EP1477462A2公开日：20041117
专利附图：
摘要：The specification describes the production of optical fibers and optical fiber
preforms using Chemical Powder Deposition (CPD). In this process a slurry of silicapowders and dopant powders in a liquid carrier is prepared and the inside surface of asilica glass starter tube is coated with the slurry, then dried. The coating is thenconsolidated and the tube collapsed as in the conventional MCVD process. Multiplecoatings, and coatings with varying compositions, can be used to produce any desiredprofile. In an alternative embodiment, doped silica glass of the desired final compositionis prepared, and then pulverized to form the powder for the slurry. In bothembodiments, the use of powders of known composition in the slurry allows directcontrol over the final glass composition, as compared with conventional processes inwhich the composition in the final glass is indirectly controlled by control of thethermodynamics of a vapor phase reaction.
申请人：Furukawa Electric North America Inc.
地址：2000 Northeast Expressway, Suite F020 Norcross, GA 30071 US
国籍：US
代理机构：Schoppe, Fritz, Dipl.-Ing.
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