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    Quartz optical waveguide and method for producing the same
    4.
    发明授权
    Quartz optical waveguide and method for producing the same 失效
    石英光波导及其制造方法

    公开(公告)号：US5243677A

    公开(公告)日：1993-09-07

    申请号：US911744

    申请日：1992-07-10

    申请人： Hiroo Kanamori ,  Masumi Ito ,  Shinji Ishikawa ,  Haruhiko Aikawa ,  Sumio Hoshino

    发明人： Hiroo Kanamori ,  Masumi Ito ,  Shinji Ishikawa ,  Haruhiko Aikawa ,  Sumio Hoshino

    IPC分类号： G02B6/122 ,  G02B6/134

    CPC分类号： G02B6/1342 ,  G02B6/122

    摘要： A quartz optical waveguide comprising a substrate, a ridge-form core part formed on said substrate and a part which surrounds said core part and has a lower refractive index than that of said core part, wherein a refractive index changes continuously at an interface between said core part and said part having the lower refractive index, which has a decreased transmission loss and a connection loss when connected with an optical fiber.

    摘要翻译： 一种石英光波导，包括基板，形成在所述基板上的脊形芯部分和围绕所述芯部的折射率低于所述芯部折射率的部分，其中折射率在所述芯部的界面处连续变化 芯部分和具有较低折射率的所述部分，当与光纤连接时具有降低的传输损耗和连接损耗。

    Increasing a fluorine compound flow rate during a VAD process
    5.
    发明授权
    Increasing a fluorine compound flow rate during a VAD process 失效
    在VAD过程中增加氟化合物流量

    公开(公告)号：US5895515A

    公开(公告)日：1999-04-20

    申请号：US754990

    申请日：1996-11-22

    申请人： Shinji Ishikawa ,  Masumi Ito ,  Sumio Hoshino

    发明人： Shinji Ishikawa ,  Masumi Ito ,  Sumio Hoshino

    IPC分类号： C03B37/014 ,  C03B37/018

    CPC分类号： C03B37/01446 ,  C03B37/01413 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2207/30 ,  C03B2207/50 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/0365

    摘要： In a soot-deposition container, raw material gas and at the tip of a starting glass rod, combustion gas, and carrier gas are supplied to a core-depositing burner and raw material gas, combustion gas, carrier gas, and gas for doping of fluorine are supplied to a cladding-depositing burner, thereby forming porous glass soot comprised of glass soot for core and glass soot for cladding. With growth of soot, the supply amount of the fluorine-doping gas is increased while supply amounts of the other gases are kept constant. Next, dehydration process and transparentizing process of soot are carried out to obtain a glass preform for optical fiber. Fabricated in this way is the glass preform for optical fiber having the silica glass portion doped with low-concentration fluorine with high uniformity in the growth direction.

    摘要翻译： 在烟灰沉积容器中，将原料气体和起始玻璃棒的顶端，燃烧气体和载气供应到芯沉积燃烧器和原料气体，燃烧气体，载气和用于掺杂的气体 氟被供应到包层沉积燃烧器，从而形成由用于芯的玻璃烟炱和用于包层的玻璃烟炱组成的多孔玻璃烟炱。 随着烟灰的增长，氟掺杂气体的供应量增加，而其它气体的供应量保持恒定。 接着，进行烟灰的脱水处理和透明化处理，得到光纤用玻璃预制体。 以这种方式制造的是具有掺杂有生长方向高均匀性的低浓度氟的石英玻璃部分的光纤用玻璃预制件。

    Optical switch
    8.
    发明授权
    Optical switch 失效
    光开关

    公开(公告)号：US5224185A

    公开(公告)日：1993-06-29

    申请号：US838689

    申请日：1992-02-21

    申请人： Masumi Ito ,  Sumio Hoshino ,  Hiroo Kanamori

    发明人： Masumi Ito ,  Sumio Hoshino ,  Hiroo Kanamori

    IPC分类号： G02B6/12 ,  G02F1/313 ,  G02F1/35 ,  G02F1/355

    CPC分类号： G02F1/3132 ,  G02F1/3555 ,  G02F2202/021 ,  G02F2202/07

    摘要： An optical switch with improved stability which has a flat waveguide including at least two optical waveguides which are made of a glass containing silica and arranged closely each other, at least a core part of each of the optical waveguides consisting of an amorphous material which is prepared by a sol-gel method and contains organic molecules doped and orientated in a direction of electrostatic field by the application of an electrostatic field, and means for changing an optical path through change of a refractive index of the core part by applying an external force to the core part, which means is provided near the core part.

    Single-mode optical fibers and fabrication methods thereof
    9.
    发明授权
    Single-mode optical fibers and fabrication methods thereof 有权
    单模光纤及其制造方法

    公开(公告)号：US06625360B2

    公开(公告)日：2003-09-23

    申请号：US09845301

    申请日：2001-05-01

    申请人： Takeshi Kyogoku ,  Masumi Ito ,  Takehiko Kito ,  Sumio Hoshino

    发明人： Takeshi Kyogoku ,  Masumi Ito ,  Takehiko Kito ,  Sumio Hoshino

    IPC分类号： G02B602

    CPC分类号： G02B6/03633 ,  G02B6/02 ,  G02B6/02214 ,  G02B6/0283 ,  G02B6/03644 ,  G02B6/03661

    摘要： For an index change of an interfacial region 20 which is formed in a boundary between core region 10 and cladding region 30 and which decreases its refractive indices from the core region 10 side to the cladding region 30 side, a change rate in relative index difference (0.5×&Dgr;n)/(d/r) normalized by a core radius r, obtained for a domain of change from 0.8×&Dgr;n to 0.3×&Dgr;n relative to a relative index difference &Dgr;n of the core region 10, is used as an index for evaluation of refractive index change and an allowable range of values thereof is set to a range of the lower limit of 0.4% to the upper limit of 4.0%, whereby a single-mode optical fiber capable of low loss phototransmission can be realized while reducing influence of a tail spread and strain in the optical fiber.

    摘要翻译： 对于形成在芯区域10和包层区域30之间的边界并且使其从芯部区域10侧到包层区域30侧的折射率降低的界面区域20的折射率变化，相对折射率差的变化率 0.5xDeltan）/（d / r）作为折射率的评价指标，用芯轴半径r进行归一化，该芯半径r是从0.8xDeltan变为0.3xDeltan而得到的，相对于芯部区域10的相对折射率差Deltan， 指标变化和其允许值的范围被设定为下限0.4％至上限4.0％的范围，由此可以实现能够实现低损耗光传输的单模光纤，同时减少尾部的影响 在光纤中扩散和应变。