Method and apparatus for fabricating optical fiber preform using double torch in mcvd
    142.
    发明申请
    Method and apparatus for fabricating optical fiber preform using double torch in mcvd 审中-公开
    在mcvd中使用双炬制造光纤预制棒的方法和装置

    公开(公告)号:US20050000252A1

    公开(公告)日:2005-01-06

    申请号:US10497093

    申请日:2003-02-26

    Abstract: Disclosed is a method for fabricating an optical fiber preform using a double torch in MCVD, which includes a first process of heating a quartz tube (10) at a temperature lower than a sintering temperature by using a first torch (21) with putting reaction gas, oxygen gas and dehydration gas into the tube so that soot particles are generated and deposited, and heating the tube to a predetermined temperature by using a second torch (22) spaced apart from the first torch after the first torch (21) passes so that moisture in the soot particles is removed; and a second process of conducting dehydration for removing moisture in the soot particles by use of the first torch (21) again, and heating the tube above a sintering temperature by using the second torch (22) so that the soot particles free from moisture are vitrified.

    Abstract translation: 公开了一种使用MCVD中的双炬制造光纤预制件的方法,该方法包括通过使用第一炬(21)将石英管(10)加热至低于烧结温度的第一工序, ,氧气和脱水气体进入管中,从而产生并沉积烟灰颗粒,并且通过在第一焊炬(21)通过之后使用与第一炬间隔开的第二炬(22)将管加热到预定温度,使得 除去烟灰颗粒中的水分; 以及再次通过使用第一炬(21)进行脱水以除去烟灰颗粒中的水分的第二过程,并且通过使用第二炬(22)将管加热到高于烧结温度,使得没有水分的烟灰颗粒是 玻璃化

    Glass base material for optical fiber and manufacturing method thereof where absorption by hydroxyl groups is reduced
    143.
    发明申请
    Glass base material for optical fiber and manufacturing method thereof where absorption by hydroxyl groups is reduced 审中-公开
    用于光纤的玻璃基材及其由羟基吸收降低的制造方法

    公开(公告)号:US20040200241A1

    公开(公告)日:2004-10-14

    申请号:US10819955

    申请日:2004-04-08

    Abstract: A method for manufacturing a glass base material for an optical fiber by forming a core rod having a core section and a portion of a clad, forming an additional clad by depositing glass particles on circumference of the core rod, and performing a sintering and vitrifying process on an obtained porous base material, includes the step of forming the core rod in order that the relation 3.75nulla/mnull6 is satisfied, where nullanull denotes an outer diameter of a section corresponding to the core rod, and nullmnull denotes a mode field diameter at 1385 nm in wavelength with regard to the optical fiber obtained by drawing the glass base material.

    Abstract translation: 一种制造光纤用玻璃基材的方法,其特征在于,通过形成具有芯部和包层的一部分的芯棒,通过在所述芯棒的周围沉积玻璃粒子而形成附加的包层,并进行烧结和玻璃化处理 在获得的多孔基材上,包括形成芯棒的步骤,以满足3.75 <= a / m <= 6的关系,其中“a”表示对应于芯棒的部分的外径,以及 “m”表示相对于通过拉制玻璃基材而获得的光纤的波长为1385nm的模场直径。

    Synthetic quartz glass optical material and optical member
    145.
    发明授权
    Synthetic quartz glass optical material and optical member 有权
    合成石英玻璃光学材料和光学元件

    公开(公告)号:US06689705B2

    公开(公告)日:2004-02-10

    申请号:US10048309

    申请日:2002-01-29

    Abstract: An object of the present invention is to provide a synthetic quartz glass optical material having a high optical transmittance for a radiation 157 nm in wavelength emitted from F2 excimer laser and a high resistance against irradiation of a F2 excimer laser radiation, yet having a uniformity suitable for such a fine patterning using a F2 excimer laser, and to provide an optical member using the same. The problems above are solved by a synthetic quartz glass optical material for F2 excimer lasers having an OH group concentration of 0.5 ppm or lower, a fluorine concentration of 0.1 to 2 mol %, a hydrogen molecule concentration of 5×1016 molecules/cm3 or lower, a difference between the maximum and minimum fluorine concentrations within 20 mol ppm, and a difference between the maximum and minimum refraction indices of 2×10−5 or lower.

    Abstract translation: 本发明的目的是提供一种合成石英玻璃光学材料,其对于从F2准分子激光器发射的波长为157nm的辐射具有高的透光率,并且具有高的对F2准分子激光辐射照射的抗性,但具有适合的均匀性 对于使用F2准分子激光器的精细图案化,并提供使用其的光学部件。 上述问题由OH基浓度为0.5ppm以下,氟浓度为0.1〜2mol%,氢分子浓度为5×10 16分子/ cm 2的F2准分子激光的合成石英玻璃光学材料解决, 3>以下,最大和最小氟浓度在20mol ppm内的差异,以及最大和最小折射率之间的差异为2×10 -5或更低。

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