METHOD OF CONTROLLING FLUORINE DOPING IN SOOT PREFORMS
    78.
    发明申请
    METHOD OF CONTROLLING FLUORINE DOPING IN SOOT PREFORMS 审中-公开
    控制荧光染料的方法

    公开(公告)号:WO00058232A1

    公开(公告)日:2000-10-05

    申请号:PCT/US2000/005947

    申请日:2000-03-07

    Abstract: A method for controlling the refractive index achieved using a fluorine dopant gas, wherein CF4 is employed as the dopant gas, and the soot preform (12) is doped using the CF4 for a time and temperature sufficient to result in a decrease in fluorine dopant nearest the surface which is in contact with the CF4 gas. Preform (12) is mounted on handle (11) which is fused to handle (14) and the assembly (20) is heated in a furnace muffle (15). The CF4 flows through furnace muffle (15), as indicated by arrows (17), and preferably contains a diluent gas such as helium. An optional centerflow gas (16) may be flowed through the centerline hole (18) in several embodiments, which consists of helium. The end of the porous preform (12) may optionally include a capillary tube (19) to prevent the muffle gases (17) from entering the preform.

    Abstract translation: 控制使用氟掺杂剂气体实现的折射率的方法,其中使用CF 4作为掺杂剂气体,并且使用CF 4掺杂烟灰预制件(12)足够的时间和温度以使氟掺杂剂最近的降低 与CF4气体接触的表面。 预制件(12)安装在手柄(11)上,手柄(11)熔合到手柄(14)上,并且组件(20)在炉马弗炉(15)中被加热。 如箭头(17)所示,CF4流过炉马弗炉(15),并且优选地包含诸如氦气的稀释气体。 在由氦组成的几个实施例中,可选的中心流气体(16)可以流过中心线孔(18)。 多孔预型件(12)的端部可任选地包括毛细管(19),以防止马弗炉气体(17)进入预型件。

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