Methods for optical fiber manufacture
    1.
    发明申请
    Methods for optical fiber manufacture 审中-公开
    光纤制造方法

    公开(公告)号:US20050284184A1

    公开(公告)日:2005-12-29

    申请号:US10880205

    申请日:2004-06-29

    摘要: The specification describes a method for addressing defects in the center of the core of an optical fiber that are formed during high temperature steps associated with collapsing a hollow core fabricated by the MCVD, PCVD, or OVD methods. These defects form absorption centers and impair the optical transmission properties of the optical fiber. The defects are reduced or eliminated according to the invention by forming a buffer layer as the last deposited layer before collapse. The buffer layer is undoped, or lightly doped, and provides a diffusion barrier to prevent or slow a change in the oxide glass stoichiometry. The result is that fewer dopant and oxygen atoms exit from the core layers through the free surface during collapse, resulting in fewer defects and lower fiber attenuation.

    摘要翻译: 本说明书描述了一种用于解决在与通过MCVD,PCVD或OVD方法制造的中空芯片相关联的高温步骤期间形成的光纤芯的中心处的缺陷的方法。 这些缺陷形成吸收中心并损害光纤的光传输性能。 通过在崩溃之前形成缓冲层作为最后的沉积层,根据本发明减少或消除缺陷。 缓冲层未掺杂或轻掺杂,并提供扩散阻挡层以防止或减缓氧化物玻璃化学计量的变化。 结果是在塌陷期间,较少的掺杂剂和氧原子通过自由表面从核心层离开,导致较少的缺陷和较低的纤维衰减。

    Optical fiber manufacture
    2.
    发明申请
    Optical fiber manufacture 审中-公开
    光纤制造

    公开(公告)号:US20060213231A1

    公开(公告)日:2006-09-28

    申请号:US11444754

    申请日:2006-05-31

    IPC分类号: C03B37/028 C03B37/018

    摘要: The specification describes methods for the manufacture of very large optical fiber preforms wherein the core material is produced by MCVD. Previous limitations on preform size inherent in having the MCVD starting tube as part of the preform process are eliminated by removing the MCVD starting tube material from the collapsed MCVD rod by etching or mechanical grinding. Doped overcladding tubes are used to provide the outer segments of the refractive index profile thus making most effective use of the MCVD produced glass and allowing the production of significantly larger MCVD preforms than previously possible.

    摘要翻译: 该说明书描述了用于制造非常大的光纤预制件的方法,其中芯材料通过MCVD制造。 通过蚀刻或机械研磨,通过从收缩的MCVD棒中除去MCVD起始管材料,从而消除了将MCVD起始管作为预制件工艺的一部分而固有的预制件尺寸的限制。 掺杂的外包管用于提供折射率分布的外部部分,从而最有效地利用MCVD生产的玻璃,并允许生产比之前可能的显着更大的MCVD预成型件。