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    • 10. 发明授权
    • Continuous optical fiber preform fabrication method
    • 连续光纤预制棒制造方法
    • US4062665A
    • 1977-12-13
    • US784869
    • 1977-04-05
    • Tatsuo IzawaTadashi MiyashitaFumiaki Hanawa
    • Tatsuo IzawaTadashi MiyashitaFumiaki Hanawa
    • C03B37/018C03B37/014G02B6/00C03B37/00
    • C03B37/01426C03B37/014C03B37/01406C03B37/01413C03B37/0142C03B2201/06C03B2201/10C03B2201/42C03B2203/22C03B2207/04C03B2207/12C03B2207/16C03B2207/20C03B2207/22C03B2207/42C03B2207/62C03B2207/70C03B2207/81C03B2207/86
    • A refractory starting member is rotated and, at the same time, moved along the axis of rotation. A glass raw material for the formation of the core of a porous preform and consequently an optical fiber preform is introduced into a high temperature portion near the tip of a high temperature burner from a nozzle for the core disposed in alignment with the center of rotation of one end face of the starting member. The glass raw material blown out from the nozzle for the core are caused by the flames of the high temperature burner to react to produce glass fine particles, which are deposited on abovesaid end face of the starting member at the central portion thereof in its axial direction to form a porous core. At least one nozzle for spraying a glass raw material for the formation of the cladding of the optical fiber preform is disposed opposite to the end face of the starting member but a little deviated from the axis of rotation thereof, or disposed opposite to the peripheral surface of the porous core. The glass raw material for the cladding is sprayed from the nozzle for the cladding to the high temperature portion of the high temperature burner, and caused to react to form glass fine particles, which are deposited on the end face of the starting member on the outside of the porous core or on the peripheral surface thereof at the same time as the formation of the latter, forming a porous cladding. The porous preform thus obtained is moved into a high temperature furnace provided on the path of movement of the preform for the vitrification thereof into an optical fiber preform.
    • 旋转耐火起动部件,并且同时沿着旋转轴线移动。 用于形成多孔预成型件的核心的玻璃原料以及因此的光纤预制件被引入到高温燃烧器的尖端附近的高温部分中,所述高温部分从用于芯部的喷嘴设置成与旋转中心 起始构件的一个端面。 从芯的喷嘴吹出的玻璃原料是由高温燃烧器的火焰引起的反应而产生的玻璃微粒,它们在其中心部分的轴向方向沉积在起始构件的上端面上 以形成多孔芯。 用于喷射用于形成光纤预制件的包层的玻璃原料的至少一个喷嘴设置成与起始构件的端面相对,但是稍微偏离其旋转轴线,或者与周面相对设置 的多孔芯。 用于包层的玻璃原料从用于包层的喷嘴喷射到高温燃烧器的高温部分,并使其反应形成玻璃细颗粒,其沉积在外部的起始构件的端面上 的多孔芯或其外周表面,同时形成多孔芯,形成多孔包层。 将由此获得的多孔预制件移动到设置在预成型体的运动路径上的高温炉中,以将其玻璃化成为光纤预制件。