Optical fiber preform manufacture using improved VAD
    261.
    发明申请
    Optical fiber preform manufacture using improved VAD 有权
    使用改进的VAD的光纤预制棒制造

    公开(公告)号:US20030209516A1

    公开(公告)日:2003-11-13

    申请号:US10142689

    申请日:2002-05-10

    Inventor: Fengqing Wu

    Abstract: The specification describes a VAD method for producing optical fiber preforms by depositing soot onto a solid core rod. The solid core rod preferably has a uniform composition, doped or undoped, suitable for the center core region of the preform. The primary cladding layer, and additional cladding layers if desired, are produced by depositing soot on the center core rod. The surface of the center core rod is treated with an etchant torch that traverses the center core rod in front of the soot deposition torch. This produces a clean interface between the core and primary cladding. This soot-on-center-core-rod method allows the production of sharp index profiles by reducing the diffusion of dopants into and out of the center core portion of the preform that occurs in soot-on-soot processes.

    Abstract translation: 该说明书描述了通过将烟灰沉积在实心芯棒上来生产光纤预制棒的VAD方法。 固体芯棒优选具有适合于预成型件的中心芯区域的均匀组成,掺杂或未掺杂。 如果需要,初级包层和附加的包覆层是通过在中心芯棒上沉积烟灰而产生的。 中心芯棒的表面用在烟灰沉积火炬前面穿过中心芯棒的蚀刻炬进行处理。 这在芯和初级包层之间产生干净的界面。 这种烟灰中心芯棒方法允许通过减少掺杂剂进入和吹出在烟灰过程中发生的预制棒的中心芯部分的扩散而产生尖锐的折射率分布。

    Method for manufacturing preform and preform
    263.
    发明申请
    Method for manufacturing preform and preform 审中-公开
    制造预制件和预制件的方法

    公开(公告)号:US20030115910A1

    公开(公告)日:2003-06-26

    申请号:US10318183

    申请日:2002-12-13

    CPC classification number: C03C13/00 C03B37/01446 C03B2201/04 C03B2201/075

    Abstract: A method for manufacturing a preform, which is a base material of an optical fiber, comprising: forming porous-glass-base-material by accumulating glass particles; dehydrating the porous-glass-base-material by heating the porous-glass-base-material in an atmosphere of gas that contains chlorine; heating the porous-glass-base-material dehydrated by the dehydrating with a first heating temperature in an atmosphere of a first inert gas; and vitrifying the porous-glass-base-material by heating the porous-glass-base-material with a second heating temperature in an atmosphere of second inert gas.

    Abstract translation: 一种制造作为光纤的基材的预成型体的制造方法,其特征在于,包括:通过蓄积玻璃粒而形成多孔玻璃基材料; 通过在包含氯的气体气氛中加热多孔玻璃基材料来使多孔玻璃基材料脱水; 在第一惰性气体的气氛中,以第一加热温度加热脱水脱水的多孔玻璃基材料; 以及在第二惰性气体的气氛中以第二加热温度加热多孔玻璃基材料来使多孔玻璃基材料玻璃化。

    Method for producing fused silica and doped fused silica glass
    264.
    发明申请
    Method for producing fused silica and doped fused silica glass 失效
    生产熔融石英和掺杂的石英玻璃的方法

    公开(公告)号:US20020157420A1

    公开(公告)日:2002-10-31

    申请号:US09844081

    申请日:2001-04-27

    Abstract: A method for forming a fused silica glass includes delivering a silica precursor to a burner and passing the silica precursor through the flame of the burner to form silica particles, depositing the silica particles on a planar surface to form a flat, porous preform, dehydrating the porous preform, and consolidating the porous preform into a flat, dense glass.

    Abstract translation: 用于形成熔融石英玻璃的方法包括将二氧化硅前体输送到燃烧器并使二氧化硅前体通过燃烧器的火焰以形成二氧化硅颗粒,将二氧化硅颗粒沉积在平坦表面上以形成平坦多孔的预制件,使 多孔预制件,并将多孔预成型件固结成平坦,致密的玻璃。

    Method for manufacturing an article comprising a refractory a dielectric
body
    265.
    发明授权
    Method for manufacturing an article comprising a refractory a dielectric body 失效
    一种用于制造包括电介质体耐火材料的制品的方法

    公开(公告)号:US5979190A

    公开(公告)日:1999-11-09

    申请号:US118743

    申请日:1998-07-17

    Abstract: A refractory dielectric body is heated with a plasma fireball at conditions which do not result in substantial removal of a surface portion of the body, yet which are sufficient to reduce both surface and bulk impurities. Typically, the body is treated with the plasma in the absence of simultaneous deposition of material onto the body. Advantageously, an isothermal, oxygen or oxygen-containing plasma is utilized. The invention is useful for reducing chlorine impurities by at least about 30% to a depth of at least about 10 .mu.m, with accompanying reduction of hydroxyl impurities. The invention thus provides a useful method for reducing the concentration of impurities that contribute to imperfections during the process of drawing fiber from an optical fiber preform, without requiring substantial removal of the surface of the preform.

    Abstract translation: 在不会导致主体的表面部分的基本去除的条件下,用等离子体火球加热难熔电介质体,但这足以减少表面和体积杂质。 通常,在不将材料同时沉积到身体上的情况下,用等离子体处理身体。 有利地,使用等温,含氧或含氧等离子体。 本发明可用于将氯杂质减少至少约30%至至少约10μm的深度,伴随着羟基杂质的减少。 因此,本发明提供了一种有用的方法,用于在从纤维预制棒中拉伸纤维的过程中减少有助于缺陷的杂质的浓度,而不需要基本上去除预型体的表面。

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