Internal vapour deposition process
    7.
    发明授权
    Internal vapour deposition process 有权
    内部气相沉积工艺

    公开(公告)号:US08402792B2

    公开(公告)日:2013-03-26

    申请号:US13082076

    申请日:2011-04-07

    Abstract: A method for manufacturing a primary preform for optical fibers using an internal vapor deposition process, including the steps of: i) providing a hollow glass substrate tube having a supply side and a discharge side, ii) surrounding at least part of the hollow glass substrate tube by a furnace, iii) supplying doped or undoped glass-forming gases to the interior of the hollow glass substrate tube via the supply side thereof, iv) creating a reaction zone in which conditions such that deposition of glass will take place on the interior of the hollow glass tube are created, and v) moving the reaction zone back and forth along the length of the hollow glass substrate tube between a reversal point located near the supply side and a reversal point located near the discharge side of the hollow glass substrate tube, wherein, during at least part of step v), the gas flow comprises a first concentration of fluorine-containing compound when the reaction zone is moving in the direction of the discharge side.

    Abstract translation: 一种使用内部气相沉积工艺制造用于光纤的初级预制棒的方法,包括以下步骤:i)提供具有供给侧和排出侧的中空玻璃基板管,ii)至少部分中空玻璃基板 通过炉子管,iii)通过其供应侧将掺杂或未掺杂的玻璃形成气体供应到中空玻璃基底管的内部,iv)产生反应区,其中在内部发生玻璃沉积的条件 并且v)沿着中空玻璃基板管的长度在位于供给侧附近的反转点与位于中空玻璃基板的排出侧附近的反转点之间前后移动反应区域 管,其中在步骤v)的至少一部分期间,当反应区沿盘的方向移动时,气流包括第一浓度的含氟化合物 大一边

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