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    • 63. 发明授权
    • Optical fiber preform fabricating method
    • 光纤预制棒制造方法
    • US08381549B2
    • 2013-02-26
    • US11921418
    • 2007-06-21
    • Tetsuya NakanishiTetsuya HarunaShinji Ishikawa
    • Tetsuya NakanishiTetsuya HarunaShinji Ishikawa
    • C03B37/018
    • C03B37/01807C03B2201/12C03B2201/20C03B2201/28C03B2201/31C03B2201/32C03B2207/86C03B2207/87C03C3/06C03C13/046C03C2203/40
    • The present invention relates to an optical fiber preform fabricating method that makes it possible to implement a reduction in iron impurities at a low cost. The optical fiber preform fabricating method comprises a glass synthesis step for forming a glass region constituting at least a part of the core area of the optical fiber. The glass synthesis step includes a deposition step of depositing glass particles containing the Al-element inside the glass pipe by means of chemical vapor deposition, and a consolidation step of obtaining a transparent glass body from the glass soot body thus obtained. In other words, the deposition step synthesizes glass particles on the inside wall of a glass pipe by feeding raw material gas, in which the content ratio (O/Al) of the O-element and Al-element is 20 or less, into the glass pipe. Furthermore, the consolidation step obtains a transparent glass body from the glass soot body by heating the glass soot body. The transparent glass body that is formed in the consolidation step constitutes part of the core region.
    • 本发明涉及能够以低成本实现铁杂质的还原的光纤预制体的制造方法。 光纤预制体制造方法包括玻璃合成步骤,用于形成构成光纤的核心区域的至少一部分的玻璃区域。 玻璃合成步骤包括通过化学气相沉积在玻璃管内沉积含有Al元素的玻璃颗粒的沉积步骤,以及从由此获得的玻璃烟灰体获得透明玻璃体的固结步骤。 换句话说,沉积步骤通过将O元件和Al元素的含量比(O / Al)为20以下的原料气体进料到玻璃管的内壁上而合成玻璃粒子。 玻璃管。 此外,固结步骤通过加热玻璃烟灰体从玻璃烟灰体获得透明玻璃体。 在固结步骤中形成的透明玻璃体构成核心区域的一部分。
    • 68. 发明授权
    • Method of producing an optical fiber preform
    • 光纤预制棒的制造方法
    • US07891217B2
    • 2011-02-22
    • US11665600
    • 2005-10-20
    • Tetsuya NakanishiMasaaki Hirano
    • Tetsuya NakanishiMasaaki Hirano
    • C03B37/01C03B37/012C03B37/014C03B37/018
    • C03B37/01823C03B2207/66Y02P40/57
    • Glass can be synthesized and deposited at a high rate by the inside CVD method using a plasma burner in a manner such that unconsolidated portions or bubbles are little generated. The method includes a step of depositing a glass film on the inner wall surface of a starting pipe. In a first aspect, temperature the pipe is controlled not to exceed (1800 +100xd)° C., a temperature of (1100 +100xd)° C. or higher being continued for 20 seconds or more at each point of the pipe, where d (mm) represents the wall thickness of the pipe. In a second aspect, the burner includes at least two inlets and has an inner diameter of 80 mm or more, and the deposition step is performed in the relationship, 150 mm/s
    • 可以通过使用等离子体燃烧器的内部CVD方法以高速率合成和沉积玻璃,使得很少产生未固化的部分或气泡。 该方法包括在起始管的内壁表面上沉积玻璃膜的步骤。 在第一方面,管道的温度控制不超过(1800 + 100×d)℃,(1100 + 100×d)℃或更高的温度在管道的每个点处持续20秒以上,其中 d(mm)表示管道的壁厚。 在第二方面,燃烧器包括至少两个入口并且具有80mm或更大的内径,并且沉积步骤以150mm / s(引入燃烧器的气体的总流量) /(燃烧器的截面积)<600 mm / s。
    • 70. 发明申请
    • Optical Fiber Preform Fabricating Method, Optical Fiber Fabricating Method and Optical Fiber
    • 光纤预制件制造方法,光纤制造方法和光纤
    • US20100071420A1
    • 2010-03-25
    • US11921418
    • 2007-06-21
    • Tetsuya NakanishiTetsuya HarunaShinji Ishikawa
    • Tetsuya NakanishiTetsuya HarunaShinji Ishikawa
    • C03C27/00
    • C03B37/01807C03B2201/12C03B2201/20C03B2201/28C03B2201/31C03B2201/32C03B2207/86C03B2207/87C03C3/06C03C13/046C03C2203/40
    • The present invention relates to an optical fiber preform fabricating method that makes it possible to implement a reduction in iron impurities at a low cost. The optical fiber preform fabricating method comprises a glass synthesis step for forming a glass region constituting at least a part of the core area of the optical fiber. The glass synthesis step includes a deposition step of depositing glass particles containing the Al-element inside the glass pipe by means of chemical vapor deposition, and a consolidation step of obtaining a transparent glass body from the glass soot body thus obtained. In other words, the deposition step synthesizes glass particles on the inside wall of a glass pipe by feeding raw material gas, in which the content ratio (O/Al) of the O-element and Al-element is 20 or less, into the glass pipe. Furthermore, the consolidation step obtains a transparent glass body from the glass soot body by heating the glass soot body. The transparent glass body that is formed in the consolidation step constitutes part of the core region.
    • 本发明涉及能够以低成本实现铁杂质的还原的光纤预制体的制造方法。 光纤预制体制造方法包括玻璃合成步骤,用于形成构成光纤的核心区域的至少一部分的玻璃区域。 玻璃合成步骤包括通过化学气相沉积在玻璃管内沉积含有Al元素的玻璃颗粒的沉积步骤,以及从由此获得的玻璃烟灰体获得透明玻璃体的固结步骤。 换句话说,沉积步骤通过将O元件和Al元素的含量比(O / Al)为20以下的原料气体进料到玻璃管的内壁上而合成玻璃粒子。 玻璃管。 此外,固结步骤通过加热玻璃烟灰体从玻璃烟灰体获得透明玻璃体。 在固结步骤中形成的透明玻璃体构成核心区域的一部分。