公开(公告)号：US4224046A

公开(公告)日：1980-09-23

申请号：US932968

申请日：1978-08-11

申请人： Tatsuo Izawa ,  Toru Kuwabara ,  Yuichi Masuda ,  Yuji Kameo

发明人： Tatsuo Izawa ,  Toru Kuwabara ,  Yuichi Masuda ,  Yuji Kameo

IPC分类号： C03B37/018 ,  C03B37/014 ,  G02B6/00 ,  G02B6/028 ,  C03B19/06 ,  C03B37/075

CPC分类号： G02B6/0281 ,  C03B37/01413 ,  C03B37/0142 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/26 ,  C03B2207/06 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/28 ,  C03B2207/81 ,  C03B2207/86 ,  C03B2207/87 ,  Y10S65/16

摘要： Two gaseous raw glass materials containing dopants to provide different refractive indices and borne by an argon carrier are jetted from the central or inner and first concentric nozzles 11, 12 of a five tip burner 1; an argon shield is supplied through the second concentric nozzle 13, and hydrogen and oxygen are supplied through the third and fourth concentric nozzles 14, 15, respectively. Soot-like glass particles 4 are formed by flame hydrolysis and deposited on the lower end of a start rod 3 which is gradually rotated and withdrawn to thus grow a cylindrical preform 2. The intermixing of the particles formed from the two glass materials produces a preform having a substantially parabolic radial index of refraction distribution, which characteristic is retained in an optical communication fiber formed by sintering and drawing the preform.

摘要翻译： 包含掺杂剂以提供不同折射率并由氩载体承载的两种气态原料玻璃材料从五个尖端燃烧器1的中心或内部和第一同心喷嘴11,12喷射; 氩屏蔽通过第二同心喷嘴13供应，氢和氧分别通过第三和第四同心喷嘴14,15供应。 烟灰状玻璃颗粒4通过火焰水解形成，并沉积在起始杆3的下端，起始杆3逐渐旋转和抽出，从而生长圆柱形预制件2.由两个玻璃材料形成的颗粒的混合产生预制件 具有基本上抛物线的径向折射率分布，其特征保留在通过烧结和拉伸预成型体而形成的光通信纤维中。

公开(公告)号：US5062680A

公开(公告)日：1991-11-05

申请号：US586984

申请日：1990-09-24

申请人： Saburo Imamura ,  Tatsuo Izawa

发明人： Saburo Imamura ,  Tatsuo Izawa

IPC分类号： G02B1/04 ,  G02B6/122 ,  G02B6/13

CPC分类号： G02B1/046 ,  G02B6/1221 ,  G02B6/13 ,  Y10T428/31504 ,  Y10T428/31612

摘要： A plate plastics optical waveguide includes a core portion composed of a polymer containing a deuterium atom or a halogen atom, and a clad portion which surrounds the core portion and is composed of a polymer having a refractive index lower than that of the core portion. A plastics optical waveguide having a core portion comprising a deuterated or halogenated polyacrylate or polysiloxane shows an optical loss of 0.1 dB/cm or less for light having a wavelength of 1.3 .mu.m.

公开(公告)号：US06885823B2

公开(公告)日：2005-04-26

申请号：US10441038

申请日：2003-05-20

申请人： Kuniharu Kato ,  Yasufumi Yamada ,  Taisuke Oguchi ,  Tatsuo Izawa

发明人： Kuniharu Kato ,  Yasufumi Yamada ,  Taisuke Oguchi ,  Tatsuo Izawa

IPC分类号： G02B5/28 ,  G02B6/12 ,  G02B6/293 ,  G02B6/34 ,  H04B10/27 ,  H04B10/29 ,  H04B10/291 ,  H04J14/00 ,  H04J14/02

CPC分类号： G02B6/12021 ,  G02B6/12007 ,  G02B6/12019 ,  G02B2006/12109

摘要： An optical multiplexing/demultiplexing apparatus in which a plurality of optical multiplexing/demultiplexing units operating in different wavelength bands are connected hierarchically. Each of the plurality of optical multiplexing/demultiplexing units includes an input waveguide for receiving wavelength multiplexed optical waves, a filter for separating the wavelength multiplexed optical wave from the input waveguide into a first optical wave in a corresponding operating wavelength band and a second optical wave in the other wavelength bands. Each of the multiplexing/demultiplexing units also includes an AWG optical multiplexer/demultiplexer for separating the first optical wave from the filter into individual optical waves each of a single wavelength, and a branch waveguide for directing the second optical waves from the filter to an input waveguide of a succeeding optical multiplexing/demultiplexing unit.

摘要翻译： 一种光复用/解复用装置，其中以不同波段工作的多个光复用/解复用单元分层连接。 多个光复用/解复用单元中的每一个包括用于接收波长复用光波的输入波导，用于将波长多路复用光波从输入波导分离成相应工作波长带的第一光波的滤波器和第二光波 在其他波段。 每个复用/解复用单元还包括用于将第一光波与滤波器分离成单个波长的单个光波的AWG光复用器/解复用器和用于将第二光波从滤波器引导到输入的分支波导 波导的后续光复用/解复用单元。

公开(公告)号：US4425146A

公开(公告)日：1984-01-10

申请号：US213069

申请日：1980-12-04

申请人： Tatsuo Izawa ,  Hidefumi Mori ,  Nobuo Shimizu ,  Yasuji Murakami

发明人： Tatsuo Izawa ,  Hidefumi Mori ,  Nobuo Shimizu ,  Yasuji Murakami

IPC分类号： C03C15/00 ,  C03C17/02 ,  C03C17/34 ,  G02B6/136 ,  C03B19/00

CPC分类号： C03C17/3411 ,  C03C15/00 ,  C03C17/02 ,  G02B6/136 ,  C03C2217/42 ,  Y10S65/16

摘要： Halides of Si and Ti, B, P, or Ge and oxygen or steam are introduced into a reaction vessel and heated in a vapor phase to form fine glass particles by oxidation or hydrolysis. The fine glass particles are deposited on a substrate. The deposited fine glass particles are heated and vitrified into a transparent glass layer, which is etched to form a core having a desired pattern by a reactive sputter etching process using Freon gas. The core is coated by a clad. In a waveguide thus formed, the cross sectional configuration and dimensions of the core layer and the refractive index difference are precisely controlled. The waveguide is manufactured with good reproducibility. The fabrication method is suitable for mass production of waveguides. An expansion coefficient transient layer is provided between the core layer and the substrate to prevent a crack in the waveguide. The glass softening temperature of the cladding layer is set lower than that of the core layer, so that the cross sectional configuration and dimensions of the core layer is unchanged against the heat in the vitrification process of the cladding layer. The refractive index is reduced in the vicinity of the boundary between the core and clad to prevent the loss of light due to light scattering on the core side faces.

摘要翻译： 将Si和Ti，B，P或Ge和氧气或蒸汽的卤化物引入反应容器中并在汽相中加热以通过氧化或水解形成细玻璃颗粒。 细玻璃颗粒沉积在基底上。 将沉积的细玻璃颗粒加热并玻璃化成透明玻璃层，其通过使用氟利昂气体的反应溅射蚀刻工艺被蚀刻以形成具有所需图案的芯。 芯由涂层涂覆。 在如此形成的波导中，芯层的横截面形状和尺寸以及折射率差被精确地控制。 制造的波导具有良好的再现性。 该制造方法适用于大规模生产波导。 在芯层和衬底之间提供膨胀系数瞬变层以防止波导中的裂纹。 包覆层的玻璃软化温度设定为低于芯层的玻璃软化温度，使得芯层的截面形状和尺寸相对于包覆层的玻璃化过程中的热量而变化。 在芯和包层之间的边界附近，折射率降低，以防止由于芯侧面上的光散射引起的光的损失。

公开(公告)号：US06954562B2

公开(公告)日：2005-10-11

申请号：US10755388

申请日：2004-01-13

申请人： Tatsuo Izawa ,  Katsuhiko Kurumada ,  Toshiaki Tamamura ,  Makoto Sato ,  Katsunari Okamoto

发明人： Tatsuo Izawa ,  Katsuhiko Kurumada ,  Toshiaki Tamamura ,  Makoto Sato ,  Katsunari Okamoto

IPC分类号： G02B6/12 ,  G02B6/132 ,  G02B6/136 ,  G02B6/35

CPC分类号： G02B6/3596 ,  G02B6/132 ,  G02B6/136 ,  G02B6/3512 ,  G02B6/3546 ,  G02B2006/12097

摘要： A matrix switch of an optical waveguide type which has low transmission loss variations and includes uniform grooves with a deep vertical cross section is provided. A switching part for selecting between a light path extending from an input port of a first set of optical waveguides 111-11m to an output port of the first set of optical waveguides 111-11m and a light path extending from an input port of the first set of optical waveguides 111-11m to an output port of a second set of optical waveguides 121-12n is arranged for insertion into a switching groove arranged at each of the intersections of the first set of optical waveguides 111-11m and the second set of optical waveguides 121-12n. Each of the switching grooves is arranged on an imaginary straight line connecting intersections of the first set of optical waveguides 111-11m and the second set of optical waveguides 121-12n.

摘要翻译： 提供了具有低传输损耗变化并且包括具有深垂直横截面的均匀凹槽的光波导型矩阵开关。 一种切换部件，用于在从第一组光波导11 1〜11 m的输入端口延伸到第一组光学器件的输出端口的光路之间进行选择 波导11 1〜11 3和从第一组光波导11的输入端口延伸的光路11 1〜11＆lt; m 2到第二组光波导12 1〜12 N n的输出端口被布置成插入到布置在每个交点处的切换槽中 第一组光波导11 1〜11 3和第二组光波导12 1〜12 N 2 / >。 每个开关槽布置在连接第一组光波导11 1〜11 2和第二组光波导12组合的交叉点的假想直线上 > 1 n 。

公开(公告)号：US3957474A

公开(公告)日：1976-05-18

申请号：US569113

申请日：1975-04-17

申请人： Soichi Kobayashi ,  Tatsuo Izawa

发明人： Soichi Kobayashi ,  Tatsuo Izawa

IPC分类号： C03B37/018 ,  A63F3/04 ,  C03B37/00 ,  C03B37/014 ,  C03C3/06 ,  C03C13/04 ,  G02B6/00 ,  C03C25/02 ,  C03C13/00

CPC分类号： C03B37/01413 ,  C03B37/0142 ,  C03B37/0148 ,  C03C13/045 ,  C03C3/06 ,  C03B2207/81 ,  C03B2207/85 ,  C03B2207/87 ,  C03C2201/30 ,  C03C2201/31 ,  C03C2201/32 ,  C03C2201/42 ,  C03C2203/44

摘要： A method for manufacturing a glass core rod and a cladding layer clothing the glass core rod applied successively or continuously by using a carbon dioxide gas laser. A refractory mandrel is heated by means of carbon dioxide gas laser irradiation and a mixed gas of oxygen and pure silicon tetrachloride vapor and a dopant compound vapor is ejected to the refractory mandrel so as to deposit silicon oxide and oxide of the dopant compound on the mandrel and to form a glass core by fusing it. Further heating is applied by irradiation by the carbon dioxide laser beam on the glass core and a mixed gas oxygen and pure silicon tetrachloride vapor and a dopant compound vapor or of oxygen gas and pure silicon tetrachloride vapor to deposit silicon oxide and oxide of the dopant compound or silicon oxide on the glass core to form a cladding layer of fused silica or fused silica containing the dopant. The preform thus formed by the glass core and the cladding is heated above the softening temperature of the preform so as to spin to form an optical fibre. The method uses laser beam heating which results in less degree of contaminating impurity and water content which might cause absorption and scattering of light also to manufacture an optical fiber having less variation at the boundary of the glass core and the cladding layer.

摘要翻译： 一种用于制造玻璃芯棒和包层的方法，其通过使用二氧化碳气体激光器连续或连续地施加玻璃芯棒。 通过二氧化碳气体激光照射加热耐火心轴，并将氧和纯四氯化硅蒸汽和掺杂剂化合物蒸汽的混合气体喷射到耐火材料心轴上，以将氧化硅和掺杂剂化合物的氧化物沉积在心轴上 并通过熔化形成玻璃芯。 通过二氧化碳激光束照射在玻璃芯和混合气体氧气和纯四氯化硅蒸气以及掺杂剂化合物蒸气或氧气和纯四氯化硅蒸汽上进行进一步加热，以沉积氧化硅和掺杂剂化合物的氧化物 或硅氧化物，以形成包含掺杂剂的熔融二氧化硅或熔融二氧化硅的包覆层。 将由玻璃芯和包层形成的预制件加热到预成型体的软化温度以上以旋转形成光纤。 该方法使用激光束加热，其导致较少污染杂质和水分含量，这可能导致光的吸收和散射，也可以制造在玻璃芯和包层的边界处具有较小变化的光纤。

公开(公告)号：US4062665A

公开(公告)日：1977-12-13

申请号：US784869

申请日：1977-04-05

申请人： Tatsuo Izawa ,  Tadashi Miyashita ,  Fumiaki Hanawa

发明人： Tatsuo Izawa ,  Tadashi Miyashita ,  Fumiaki Hanawa

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

CPC分类号： C03B37/01426 ,  C03B37/014 ,  C03B37/01406 ,  C03B37/01413 ,  C03B37/0142 ,  C03B2201/06 ,  C03B2201/10 ,  C03B2201/42 ,  C03B2203/22 ,  C03B2207/04 ,  C03B2207/12 ,  C03B2207/16 ,  C03B2207/20 ,  C03B2207/22 ,  C03B2207/42 ,  C03B2207/62 ,  C03B2207/70 ,  C03B2207/81 ,  C03B2207/86

摘要： A refractory starting member is rotated and, at the same time, moved along the axis of rotation. A glass raw material for the formation of the core of a porous preform and consequently an optical fiber preform is introduced into a high temperature portion near the tip of a high temperature burner from a nozzle for the core disposed in alignment with the center of rotation of one end face of the starting member. The glass raw material blown out from the nozzle for the core are caused by the flames of the high temperature burner to react to produce glass fine particles, which are deposited on abovesaid end face of the starting member at the central portion thereof in its axial direction to form a porous core. At least one nozzle for spraying a glass raw material for the formation of the cladding of the optical fiber preform is disposed opposite to the end face of the starting member but a little deviated from the axis of rotation thereof, or disposed opposite to the peripheral surface of the porous core. The glass raw material for the cladding is sprayed from the nozzle for the cladding to the high temperature portion of the high temperature burner, and caused to react to form glass fine particles, which are deposited on the end face of the starting member on the outside of the porous core or on the peripheral surface thereof at the same time as the formation of the latter, forming a porous cladding. The porous preform thus obtained is moved into a high temperature furnace provided on the path of movement of the preform for the vitrification thereof into an optical fiber preform.

摘要翻译： 旋转耐火起动部件，并且同时沿着旋转轴线移动。 用于形成多孔预成型件的核心的玻璃原料以及因此的光纤预制件被引入到高温燃烧器的尖端附近的高温部分中，所述高温部分从用于芯部的喷嘴设置成与旋转中心 起始构件的一个端面。 从芯的喷嘴吹出的玻璃原料是由高温燃烧器的火焰引起的反应而产生的玻璃微粒，它们在其中心部分的轴向方向沉积在起始构件的上端面上 以形成多孔芯。 用于喷射用于形成光纤预制件的包层的玻璃原料的至少一个喷嘴设置成与起始构件的端面相对，但是稍微偏离其旋转轴线，或者与周面相对设置 的多孔芯。 用于包层的玻璃原料从用于包层的喷嘴喷射到高温燃烧器的高温部分，并使其反应形成玻璃细颗粒，其沉积在外部的起始构件的端面上 的多孔芯或其外周表面，同时形成多孔芯，形成多孔包层。 将由此获得的多孔预制件移动到设置在预成型体的运动路径上的高温炉中，以将其玻璃化成为光纤预制件。