Treating an optical fiber preform with carbon monoxide
    3.
    发明授权
    Treating an optical fiber preform with carbon monoxide 有权
    用一氧化碳处理光纤预制件

    公开(公告)号:US06813908B2

    公开(公告)日:2004-11-09

    申请号:US10021366

    申请日:2001-12-12

    IPC分类号: C03B37027

    摘要: The invention includes inventive methods of treating a soot preform. One method includes heating a soot preform to a temperature of less than about 1000° C. and exposing the preform to a substantially halide free reducing agent. Preferred reducing agents include carbon monoxide and sulfur dioxide. Another inventive method of treating the preform includes exposing the preform, in a furnace, to a substantially non-chlorine containing atmosphere comprising carbon monoxide. The preform is heated to a temperature of at least about 1000° C. Preferably this method is incorporated into the process for making an optical fiber. An additional method of treating the preform includes doping the preform with fluorine and exposing the fluorine doped preform to a substantially chlorine free atmosphere comprising at least carbon monoxide at a temperature of at least 1100° C., thereby reacting excess oxygen present in the furnace.

    摘要翻译: 本发明包括处理烟炱预制件的本发明的方法。 一种方法包括将烟灰预制件加热到小于约1000℃的温度,并将预成型坯暴露于基本上不含卤化物的还原剂。 优选的还原剂包括一氧化碳和二氧化硫。 处理预成型坯的另一种发明方法包括将预成型坯在炉中暴露于包含一氧化碳的基本上不含氯的气氛中。 将预制件加热至至少约1000℃的温度。优选将该方法并入用于制造光纤的工艺中。 处理预成型件的另一种方法包括用氟掺杂预型件,并将氟掺杂预制件暴露于至少包含一氧化碳的基本上无氯的气氛中,在至少1100℃的温度下,从而使存在于炉中的过量氧气反应。