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    • 1. 发明授权
    • Optical fiber preform manufacturing apparatus
    • 光纤预制棒制造装置
    • US06487880B1
    • 2002-12-03
    • US09457392
    • 1999-12-09
    • Sung-Koog OhMan-Seok SeoJin-Seong YangMun-Hyun Do
    • Sung-Koog OhMan-Seok SeoJin-Seong YangMun-Hyun Do
    • C03B3707
    • C03B37/01248C03B37/01257C03B37/01853C03B37/01869
    • Disclosed are an optical fiber preform manufacturing apparatus and method in which processes for shrinking and closing a deposited tube are conducted using a device suitable for those processes, which device is other than the device used in a deposition process for forming the deposited tube on the inner surface of a preform tube, thereby reducing the processing time while reducing the amount of OH penetrated from the preform tube into a vitreous component of the deposited tube, thereby achieving a reduction in OH loss. In accordance with the optical fiber preform manufacturing apparatus and method, operations are conducted which involve setting the heating temperature of a circular heater to a temperature lower than the softening point of a deposited tube, exhausting contaminants existing in the interior of the deposited tube while moving the circular heater at a desired temperature, setting the heating temperature of the circular heater to a temperature not lower than the softening point of the deposited tube, and shrinking and closing the deposited tube while moving the circular heater to a desired temperature.
    • 公开了一种光纤预制棒的制造装置和方法,其中使用适用于这些工艺的装置进行用于收缩和沉积沉积管的工艺,所述装置不同于用于在内部形成沉积管的沉积工艺中使用的装置 从而减少处理时间,同时将从预成形管穿透的OH的量减少到沉积管的玻璃质成分中,从而实现OH损失的降低。 根据光纤预制棒的制造装置和方法,进行以下操作:将圆形加热器的加热温度设定为低于沉积管的软化点的温度,排出存在于沉积管内部的污染物,同时移动 在所需温度下的圆形加热器,将圆形加热器的加热温度设定为不低于沉积管的软化点的温度,以及在将圆形加热器移动到所需温度的同时收缩并沉积沉积的管。
    • 8. 发明授权
    • Optical fiber preform having OH barrier and manufacturing method thereof
    • 具有OH屏障的光纤预制件及其制造方法
    • US06280850B1
    • 2001-08-28
    • US09344368
    • 1999-06-25
    • Sung-koog OhMan-seok SeoMun-hyun DoJin-seong Yang
    • Sung-koog OhMan-seok SeoMun-hyun DoJin-seong Yang
    • G02B618
    • G02B6/03694C03B37/01807C03B2201/12C03B2201/31C03B2203/22C03B2203/24G02B6/0281G02B6/03683Y10T428/1317Y10T428/24942
    • An optical fiber preform having a substrate tube, a cladding layer and a core layer further includes a first barrier layer deposited by a material having a low OH diffusion coefficient between the substrate tube and the cladding layer, wherein the first barrier layer is for substantially preventing OH contained in the substrate tube from being diffused into the cladding layer. The optical fiber preform further includes a second barrier layer formed by depositing a material having a low OH diffusion coefficient between the cladding layer and core layer, for substantially preventing OH which has been diffused into the cladding layer from the substrate tube from being diffused further into the core layer. Outer and inner OH barriers containing no P2O5 are deposited between the substrate tube and the cladding layer and between the cladding layer and the core layer in a deposition process, such that OH can be effectively prevented from being diffused from the substrate tube to the core layer in a core deposition process, a collapsing process or a closing process.
    • 具有衬底管,包覆层和芯层的光纤预制件还包括通过在衬底管和包覆层之间具有低OH扩散系数的材料沉积的第一阻挡层,其中第一阻挡层用于基本上防止 包含在基体管中的OH扩散到包层中。 光纤预型体还包括通过在包覆层和芯层之间沉积具有低的OH扩散系数的材料而形成的第二阻挡层,用于基本上防止已经从衬底管扩散到包覆层中的OH进一步扩散到 核心层。 在沉积工艺中,在衬底管和包覆层之间以及包覆层和芯层之间沉积不含P2O5的外部和内部OH屏障,使得可以有效地防止OH从衬底管扩散到芯层 在核心沉积过程中,崩溃过程或闭合过程。
    • 10. 发明授权
    • Cooler of optical fiber draw tower
    • 光纤拉塔冷却器
    • US06279354B1
    • 2001-08-28
    • US09229609
    • 1999-01-13
    • Un-Chul PaekSung-Koog OhMan-Seok SeoKyu-Hwan Hwang
    • Un-Chul PaekSung-Koog OhMan-Seok SeoKyu-Hwan Hwang
    • C03B544
    • C03B37/02718C03B2205/55
    • A cooler of an optical fiber draw tower, situated below a melting furnace for melting a preform for an optical fiber, for cooling the optical fiber drawn from the preform melted in the melting furnace, includes at least one heat exchanger installed with a predetermined length surrounding the optical fiber drawn from the melting furnace, for cooling the drawn optical fiber. The heat exchanger is formed of a thermoelectric cooler (TEC) for taking electrical energy through one heat absorbing surface to emit heat to the other heat emitting surface and has a tubular shape in which the heat absorbing surface of the TEC surrounds the optical fiber drawn from the melting furnace along the drawing direction by a predetermined length, and the drawn optical fiber is cooled as it passes through the tubular TEC. Also, the cooler further includes an auxiliary cooler attached to the heat emitting surface of the TEC, for cooling the emitted heat. Therefore, the cooler can enhance the cooling effect, so that the drawing of the optical fiber can be sped up without increasing the height of the optical fiber draw tower.
    • 位于用于熔化用于光纤的预成型件的熔化炉下方的光纤拉制塔的冷却器,用于冷却从在熔融炉中熔化的预制件中拉出的光纤,包括安装有预定长度的至少一个热交换器 从熔化炉中拉出的光纤用于冷却拉制的光纤。 热交换器由热电冷却器(TEC)形成,用于通过一个吸热表面获取电能以向另一个发热表面发射热量,并具有管状形状,其中TEC的吸热表面围绕从 熔融炉沿着拉伸方向预定长度,并且拉制的光纤在其通过管状TEC时被冷却。 此外,冷却器还包括附接到TEC的发热表面的辅助冷却器,用于冷却发射的热量。 因此,冷却器可以提高冷却效果,从而可以在不增加光纤拉制塔的高度的情况下加速光纤的拉伸。