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Soot removing rod for MCVD process during fabrication of optical fiber preform and Soot removing apparatus using the same
Soot removing rod for MCVD process during fabrication of optical fiber preform and Soot removing apparatus using the same
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机译:用于制造光纤预制棒的MCVD工艺的除烟棒及使用该除烟棒的除烟装置
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摘要
PURPOSE: A soot removing stick is provided, which is not molten by a heat source for deposition, therefore can discharge silica soot smoothly in a modified chemical vapor deposition(MCVD) process for producing an optical fiber preform. And a soot removing apparatus using the soot removing stick is also provided. CONSTITUTION: The whole soot removing stick or a part(heated by the heat source for deposition) of the soot removing stick is made of a ceramic, wherein the ceramic has a melting point of 1600-2300deg.C and a resistance to a temperature change of more than 400deg.C by the heat source. And the soot removing apparatus contains: the soot removing stick(25) being in contact with the inner wall of an inner tube(20) for discharge, wherein the apex of the soot removing stick(25) is located at a soot inlet hole; a rotation means(30) rotating the soot removing stick(25) around a long axis to scrape the soot of the inner wall of the inner tube(20) off.
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