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    • 4. 发明申请
    • 光ファイバ母材の製造方法及び光ファイバの製造方法並びに光ファイバ
    • 光纤预制件生产方法,光纤制造方法和光纤
    • WO2003086997A1
    • 2003-10-23
    • PCT/JP2003/004823
    • 2003-04-16
    • 住友電気工業株式会社平野 正晃梁田 英二横川 知行佐々木 隆
    • 平野 正晃梁田 英二横川 知行佐々木 隆
    • C03B37/012
    • G02B6/03688C03B37/01211C03B37/0124C03B2203/22C03B2203/29C03B2203/36G02B6/02271G02B6/03644G02B6/03666Y02P40/57
    • A method for producing a preform of an optical fiber having a complex structure with high precision, a method for producing an optical fiber, and an optical fiber are disclosed. The method for producing a preform of an optical fiber comprising a center core portion disposed in the center of the optical fiber and having an index of refraction the maximum value of which is Nc, a depressed portion disposed outside the center core portion and at least having an index of refraction the minimum value of which is Nd, a ring portion having an index of refraction the minimum value of which is Nr, and an outer cladding layer having an index of refraction the maximum value of which is No, the relationship between the indexes of refraction being Nc >= Nr > No > Nd. The method comprises a glass rod producing step of inserting a rod including at least the center core portion into a pipe including at least the depressed portion and integrating them into one piece by collapsing to produce a glass rod, a glass pipe producing step of producing a glass pipe having a ring portion, and an integrating step of inserting the glass rod into the glass pipe and then integrating them into one piece by collapsing to produce a glass body.
    • 公开了一种用于制造具有高精度的复杂结构的光纤预制棒的制造方法,光纤的制造方法和光纤。 一种光纤预制棒的制造方法,其特征在于,包括设置在所述光纤中心的中心纤芯部,其最大值为Nc的折射率,设置在所述中央芯部外侧的凹部,至少具有 其最小值为Nd的折射率,最小值为Nr的折射率的折回部分的环部分和最大值为“No”的折射率的外包层,其中, 折射指数为Nc> = Nr> No> Nd。 该方法包括:玻璃棒的制造步骤,将至少包含至少中心芯部的棒插入至少包括凹部的管中,并通过塌缩将它们整合成一体以制造玻璃棒;玻璃管的制造步骤, 玻璃管具有环形部分,以及将玻璃棒插入玻璃管中然后通过塌缩而整合成一体以产生玻璃体的整合步骤。