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Sol-gel process for the production of glass optical fiber preforms
Sol-gel process for the production of glass optical fiber preforms
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机译:溶胶-凝胶法生产玻璃光纤预制棒
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摘要
Sol-gel process for the production of optical fiber preforms or overcladdings by preparing a sol, gelling the sol, drying the wet gel to a dry porous gel by supercritical drying and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350°C to 900°C under pure oxygen or a mixture of oxygen and an inert gas or gases to remove organic impurities in the dry gel, at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar is carried out.
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