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    APPARATUS FOR FABRICATING SOOT PREFORM FOR OPTICAL FIBER
    4.
    发明申请
    APPARATUS FOR FABRICATING SOOT PREFORM FOR OPTICAL FIBER 有权
    用于制造光纤的预制件的装置

    公开(公告)号：US20050210925A1

    公开(公告)日：2005-09-29

    申请号：US10698657

    申请日：2003-10-31

    申请人： Dai Inoue ,  Go Ogino ,  Tetsuya Otosaka ,  Tadakatsu Shimada ,  Hideo Hirasawa

    发明人： Dai Inoue ,  Go Ogino ,  Tetsuya Otosaka ,  Tadakatsu Shimada ,  Hideo Hirasawa

    IPC分类号： G02B6/00 ,  C03B37/014 ,  C03B37/018

    CPC分类号： C03B37/01406 ,  C03B2207/54

    摘要： An apparatus for fabricating a soot preform for an optical fiber. The soot preform is fabricated by depositing glass particles on a starting rod capable of being rotated and pulled up. The apparatus comprises elements as follows. A reaction chamber is used for depositing the glass particles on the starting rod. An upper room is located above the reaction chamber for receiving the soot preform formed in the upper portion of the reaction chamber. At least one core burner is installed in the reaction chamber. A gas-supplying inlet is located in the top part of the sidewall of the reaction chamber closest to burner(s), and a gas-exhausting outlet is located in the top part of another sidewall opposite to the gas-supplying inlet. In addition, at least one cladding burner is installed in the reaction chamber. Thus, the exhausting efficiency for the stray glass particles is increased and the bubbles and impurities in the resulting preform are reduced such that the optical property in the lengthwise direction is stable.

    摘要翻译： 一种用于制造用于光纤的烟灰预制件的设备。 烟炱预制件通过将玻璃颗粒沉积在能够旋转和拉起的起始杆上来制造。 该装置包括以下元件。 反应室用于将玻璃颗粒沉积在起始杆上。 上部房间位于反应室上方，用于接收形成在反应室上部的烟灰预制件。 至少一个核燃烧器安装在反应室中。 气体供给入口位于最接近燃烧器的反应室的侧壁的顶部，并且排气出口位于与气体供应入口相对的另一个侧壁的顶部。 此外，至少一个包层燃烧器安装在反应室中。 因此，杂散玻璃颗粒的排气效率增加，并且所得预成型体中的气泡和杂质减少，使得长度方向的光学性质稳定。

    Apparatus for fabricating soot preform for optical fiber
    5.
    发明授权
    Apparatus for fabricating soot preform for optical fiber 有权

    公开(公告)号：US07082791B2

    公开(公告)日：2006-08-01

    申请号：US10698657

    申请日：2003-10-31

    申请人： Dai Inoue ,  Go Ogino ,  Tetsuya Otosaka ,  Tadakatsu Shimada ,  Hideo Hirasawa

    发明人： Dai Inoue ,  Go Ogino ,  Tetsuya Otosaka ,  Tadakatsu Shimada ,  Hideo Hirasawa

    IPC分类号： C03B37/018

    CPC分类号： C03B37/01406 ,  C03B2207/54

    摘要： An apparatus for fabricating a soot preform for an optical fiber. The soot preform is fabricated by depositing glass particles on a starting rod capable of being rotated and pulled up. The apparatus comprises elements as follows. A reaction chamber is used for depositing the glass particles on the starting rod. An upper room is located above the reaction chamber for receiving the soot preform formed in the upper portion of the reaction chamber. At least one core burner is installed in the reaction chamber. A gas-supplying inlet is located in the top part of the sidewall of the reaction chamber closest to burner(s), and a gas-exhausting outlet is located in the top part of another sidewall opposite to the gas-supplying inlet. In addition, at least one cladding burner is installed in the reaction chamber. Thus, the exhausting efficiency for the stray glass particles is increased and the bubbles and impurities in the resulting preform are reduced such that the optical property in the lengthwise direction is stable.

    Method of forming a fiber preform to minimize shifts of the zero-dispersion wavelength
    6.
    发明授权
    Method of forming a fiber preform to minimize shifts of the zero-dispersion wavelength 失效
    形成纤维预制件以使零色散波长的偏移最小化的方法

    公开(公告)号：US5683486A

    公开(公告)日：1997-11-04

    申请号：US358529

    申请日：1994-12-19

    申请人： Hiroshi Oyamada ,  Go Ogino ,  Hideo Hirasawa

    发明人： Hiroshi Oyamada ,  Go Ogino ,  Hideo Hirasawa

    IPC分类号： C03B37/012 ,  C03B37/014 ,  C03B37/027

    CPC分类号： C03B37/014 ,  C03B2203/22 ,  C03B2203/36 ,  C03B2207/70 ,  G02B6/02247

    摘要： An improvement is proposed, in a method for the preparation of a step-index silica glass preform as a precursor of optical fibers by completing the cladding layer of the secondary preform by the outer deposition on and around a primary preform consisting of the center core and side core, to conduct the outer deposition for the cladding layer in such a way that the inequality .vertline.d.lambda..sub.0 /dk.vertline..ltoreq.500 nm is satisfied, in which k is the ratio of the diameter of the primary preform to the diameter of the secondary preform and .lambda..sub.0 is the zero-dispersion wavelength in nm of an optical fiber obtained by drawing the secondary preform, d.lambda..sub.0 /dk being the differential of a function held between .lambda..sub.0 and k determined beforehand from the distribution of the refractive index within the primary preform. When the outer deposition is performed in this way, a great improvement can be obtained in the uniformity of the zero-dispersion wavelength of the optical fiber prepared by drawing the preform.

    摘要翻译： 提出了一种改进方法，其中通过在由中心核心构成的初级预制件上和周围的外部沉积来完成二次预型体的包覆层来制备作为光纤前体的步进折射率石英玻璃预制件的方法，以及 以使得不等式|dλ0 / dk |≤500nm满足下述方式对包覆层进行外部沉积，其中k是初级预制棒的直径与直径的比率 次级预制件和λ0是通过拉制次级预制件获得的光纤的零色散波长（nm），dλ0 / dk是预先从折射率分布预先确定的λ0和k之间保持的函数的差分 初级预制件内的折射率。 当以这种方式进行外部沉积时，通过拉伸预制件制备的光纤的零色散波长的均匀性可以获得很大的改进。

    Method for the preparation of a porous silica glass preform for optical fibers
    7.
    发明授权
    Method for the preparation of a porous silica glass preform for optical fibers 失效
    制备光纤多孔石英玻璃预制件的方法

    公开(公告)号：US6145344A

    公开(公告)日：2000-11-14

    申请号：US284902

    申请日：1994-08-02

    申请人： Hiroshi Oyamada ,  Hiroyuki Koide ,  Goh Ogino ,  Hideo Hirasawa

    发明人： Hiroshi Oyamada ,  Hiroyuki Koide ,  Goh Ogino ,  Hideo Hirasawa

    IPC分类号： C03B37/018 ,  C03B37/014 ,  G02B6/00 ,  G02B6/036

    CPC分类号： G02B6/03633 ,  C03B37/0142 ,  G02B6/02042 ,  C03B2203/22 ,  C03B2203/34 ,  C03B2207/06 ,  C03B2207/50 ,  C03B2207/60 ,  C03B2207/64 ,  C03B2207/66 ,  G02B6/0281 ,  G02B6/0286

    摘要： Proposed is an improvement in the VAD process for the preparation of a porous silica glass preform for double-core optical fibers by using three oxyhydrogen flame burners installed one above the other in a flame hydrolysis chamber in which a porous silica glass body consisting of the center core portion formed by the lowermost burner, side core portion formed by the middle burner and the cladding layer formed by the uppermost burner is gradually pulled up as it grows under rotation. Different from conventional procedures in which the extension of the nozzle axis of each of the burners intersects with the rotation axis of the growing body, the extension of the nozzle axis of the middle burner for the side core is displaced in a horizontal direction by a limited distance not to intersect nor to be in parallel with the rotation axis in the invention. By this means, an improvement is obtained in the uniformity of distribution of the refractive index in the side core which otherwise is remarkably disordered.

    摘要翻译： 提出了通过在火焰水解室中使用三个氢氧焰燃烧器一起制备用于双芯光纤的多孔石英玻璃预制件的VAD方法的改进，其中由中心组成的多孔石英玻璃体 由最下面的燃烧器形成的芯部，由中间燃烧器形成的侧芯部和由最上面的燃烧器形成的包覆层随着其旋转而逐渐上升。 与常规方法不同，其中每个燃烧器的喷嘴轴线的延伸与生长体的旋转轴线相交，用于侧芯的中间燃烧器的喷嘴轴线的延伸在水平方向上被限制 在本发明中不相交或不与旋转轴平行的距离。 通过这种方式，在侧核中折射率分布的均匀性得到改善，否则其显着无序。

    Apparatus and method for manufacturing glass-base-material
    8.
    发明申请
    Apparatus and method for manufacturing glass-base-material 有权

    公开(公告)号：US20050109064A1

    公开(公告)日：2005-05-26

    申请号：US10973236

    申请日：2004-10-27

    申请人： Junichiro Takei ,  Tadakatsu Shimada ,  Hideo Hirasawa

    发明人： Junichiro Takei ,  Tadakatsu Shimada ,  Hideo Hirasawa

    IPC分类号： G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03B37/07

    CPC分类号： C03B37/01486

    摘要： An apparatus for manufacturing a glass-base-material, which is a base material of an optical fiber, includes a driving unit that drives a glass rod around an axis of the glass rod; a burner for accumulating glass soot around outside surface of the glass rod, which is driven by the driving unit, to form the glass-base-material; a weight-deducting unit, on which the driving unit is mounted, for deducting a predetermined weight from a total weight of the driving unit and the glass-base-material formed by the burner; and a measuring unit provided under the weight-deducting unit for measuring the total weight, from which the predetermined weight is deducted by the weight-deducting unit.