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    • 6. 发明授权
    • Method for producing porous glass preform for optical fiber
    • 光纤多孔玻璃预制棒的制造方法
    • US5238479A
    • 1993-08-24
    • US984734
    • 1992-12-04
    • Yuichi OhgaToshio DanzukaHiroo KanamoriHiroshi Yokota
    • Yuichi OhgaToshio DanzukaHiroo KanamoriHiroshi Yokota
    • C03B37/014
    • C03B37/0142C03B2201/31C03B2203/22C03B2203/26C03B2207/06C03B2207/20C03B2207/24C03B2207/26C03B2207/28C03B2207/50
    • The invention is a method for producing a porous preform for use in the fabrication of an optical fiber at least two burners synthesize glass soot particles, one of which generates a double-layer flame and one of which is used for forming a core part of the preform. The method comprises the steps of supplying SiCl.sub.4 and optionally GeCl.sub.4 to the inner flame of the double-layer flame, and only SiCl.sub.4 to an outer flame of the double-layer flame to flame hydrolyze the supplied compounds and synthesize glass soot particles. Compounds SiCl.sub.4 and GeCl.sub.4 as glass-forming raw materials are supplied to the burner for forming the core part of the preform by depositing the generated glass soot particles on the lower end of a rotating starting member. The generated porous preform comprises a core part containing at least partly GeO.sub.2, and a surface having a low concentration of GeO.sub.2 which reduces cracking or peeling.
    • 本发明是用于制造用于制造光纤的多孔预制棒的方法,至少两个燃烧器合成玻璃烟灰颗粒,其中一个产生双层火焰,其中一个用于形成 预制件。 该方法包括以下步骤:向双层火焰的内部火焰提供SiCl 4和任选的GeCl 4,并且仅将SiCl 4与双层火焰的外部火焰直接火焰水解所提供的化合物并合成玻璃烟灰颗粒。 作为玻璃形成原料的化合物SiCl4和GeCl4通过将生成的玻璃烟灰颗粒沉积在旋转起始构件的下端而供给到用于形成预成型体的芯部的燃烧器。 生成的多孔预制件包括至少部分含有GeO 2的核心部分和具有低浓度GeO 2的表面,其减少开裂或剥离。