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    Optical 90-degree hybrid circuit
    1.
    发明授权
    Optical 90-degree hybrid circuit 有权
    光学90度混合电路

    公开(公告)号：US08588560B2

    公开(公告)日：2013-11-19

    申请号：US13378034

    申请日：2010-07-09

    申请人： Yohei Sakamaki ,  Takashi Goh ,  Toshikazu Hashimoto ,  Yusuke Nasu ,  Kuninori Hattori ,  Hiroshi Takahashi

    发明人： Yohei Sakamaki ,  Takashi Goh ,  Toshikazu Hashimoto ,  Yusuke Nasu ,  Kuninori Hattori ,  Hiroshi Takahashi

    IPC分类号： G02B6/12 ,  G02B6/26 ,  G02B6/42 ,  H04B10/00

    CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/613 ,  H04B10/614

    摘要： An optical 90-degree hybrid circuit includes a first demultiplexing optical coupler having two or more first input ports and two or more first output ports, a second demultiplexing optical coupler having two or more second input ports and two or more second output ports, two first arm waveguides connected to the first output ports, two second arm waveguides connected to the second output ports, a 90-degree phase shift section installed in one of the four arm waveguides, a first optical coupler and a second optical coupler connected to the first arm waveguides and the second arm waveguides, a first optical waveguide for connecting an optical splitter and the first input ports, and a second optical waveguide for connecting the optical splitter and the second input ports, wherein an optical length of the first optical waveguide is different from that of the second optical waveguide.

    摘要翻译： 光学90度混合电路包括具有两个或多个第一输入端口和两个或更多个第一输出端口的第一解复用光耦合器，具有两个或多个第二输入端口和两个或更多个第二输出端口的第二解复用光耦合器，两个第一输出端口 连接到第一输出端口的臂波导，连接到第二输出端口的两个第二臂波导，安装在四个臂波导之一中的90度相移部分，连接到第一臂的第一光耦合器和第二光耦合器 波导和第二臂波导，用于连接光分路器和第一输入端口的第一光波导和用于连接光分路器和第二输入端口的第二光波导，其中第一光波导的光学长度不同于 第二光波导的。

    OPTICAL 90-DEGREE HYBRID CIRCUIT
    2.
    发明申请
    OPTICAL 90-DEGREE HYBRID CIRCUIT 有权
    光学90度混合电路

    公开(公告)号：US20120093457A1

    公开(公告)日：2012-04-19

    申请号：US13378034

    申请日：2010-07-09

    申请人： Yohei Sakamaki ,  Takashi Goh ,  Toshikazu Hashimoto ,  Yusuke Nasu ,  Kuninori Hattori ,  Hiroshi Takahashi

    发明人： Yohei Sakamaki ,  Takashi Goh ,  Toshikazu Hashimoto ,  Yusuke Nasu ,  Kuninori Hattori ,  Hiroshi Takahashi

    IPC分类号： G02B6/12

    CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/613 ,  H04B10/614

    摘要： An optical 90-degree hybrid circuit includes a first demultiplexing optical coupler having two or more first input ports and two or more first output ports, a second demultiplexing optical coupler having two or more second input ports and two or more second output ports, two first arm waveguides connected to the first output ports, two second arm waveguides connected to the second output ports, a 90-degree phase shift section installed in one of the four arm waveguides, a first optical coupler and a second optical coupler connected to the first arm waveguides and the second arm waveguides, a first optical waveguide for connecting an optical splitter and the first input ports, and a second optical waveguide for connecting the optical splitter and the second input ports, wherein an optical length of the first optical waveguide is different from that of the second optical waveguide.

    摘要翻译： 光学90度混合电路包括具有两个或多个第一输入端口和两个或更多个第一输出端口的第一解复用光耦合器，具有两个或多个第二输入端口和两个或更多个第二输出端口的第二解复用光耦合器，两个第一输出端口 连接到第一输出端口的臂波导，连接到第二输出端口的两个第二臂波导，安装在四个臂波导之一中的90度相移部分，连接到第一臂的第一光耦合器和第二光耦合器 波导和第二臂波导，用于连接光分路器和第一输入端口的第一光波导和用于连接光分路器和第二输入端口的第二光波导，其中第一光波导的光学长度不同于 第二光波导的。

    Wideband interferometer type polarization light beam combiner and splitter
    3.
    发明授权
    Wideband interferometer type polarization light beam combiner and splitter 有权
    宽带干涉仪型偏振光束组合器和分离器

    公开(公告)号：US08787710B2

    公开(公告)日：2014-07-22

    申请号：US13321780

    申请日：2010-06-02

    申请人： Takayuki Mizuno ,  Takashi Goh ,  Hiroshi Yamazaki ,  Shin Kamei ,  Tsutomu Kitoh

    发明人： Takayuki Mizuno ,  Takashi Goh ,  Hiroshi Yamazaki ,  Shin Kamei ,  Tsutomu Kitoh

    IPC分类号： G02B6/26

    CPC分类号： G02B6/12007 ,  G02B6/12023

    摘要： A interferometer type polarization beam combiner and splitter, which can combine or split polarized light over a wide band, is provided. The interferometer type polarization beam combiner and splitter includes: an optical splitter; an optical coupler; an optical path length difference imparting unit, which includes a plurality of optical waveguides arranged between the optical splitting unit and the optical coupling unit; one or two input/output ports connected to the optical splitter; and two input/output ports connected to the optical coupler. A half-integer of a wavelength of λc is set as a normalized phase difference, for the optical path length difference imparting unit, between two polarization states, and means for generating a difference in refractive index dispersion is provided between the optical waveguides of the optical path length difference imparting unit, so that the change rate of the transmittance with respect to wavelength is suppressed for the two polarization states.

    摘要翻译： 提供了可以在宽带上组合或分离偏振光的干涉仪型偏振光束组合器和分离器。 干涉仪型偏振光束组合器和分离器包括：光分路器; 光耦合器; 光路长度差分赋予单元，其包括布置在光分离单元和光耦合单元之间的多个光波导; 连接到光分路器的一个或两个输入/输出端口; 和连接到光耦合器的两个输入/输出端口。 在光路长度差分赋予单元之间，将两个偏振态之间的波长λc的半整数设定为归一化相位差，并且在光学的光波导之间设置用于产生折射率色散差的装置 路径长度差分赋予单元，从而对于两个偏振态抑制透射率相对于波长的变化率。

    Dispersion slope equalizer
    6.
    发明申请
    Dispersion slope equalizer 失效

    公开(公告)号：US20050169630A1

    公开(公告)日：2005-08-04

    申请号：US11087814

    申请日：2005-03-24

    申请人： Koichi Takiguchi ,  Katsunari Okamoto ,  Takashi Goh

    发明人： Koichi Takiguchi ,  Katsunari Okamoto ,  Takashi Goh

    IPC分类号： G02B6/34 ,  H04B10/2513 ,  H04J14/00

    CPC分类号： G02B6/29394 ,  G02B6/12007 ,  G02B6/12021 ,  G02B6/29353 ,  G02B6/29355 ,  G02B6/29395 ,  G02B6/29398 ,  H04B10/25133 ,  H04B2210/258

    摘要： The object of the present invention is to provide a compact dispersion slope equalizer by which it is possible to simultaneously recover distorted waveforms of WDM signals by dispersion slope of DSF or NZ-DSF at 1.55 μm band, and to compensate for the dispersion of various fiber transmission lines having various dispersion values and variation of dispersion value caused by the temperature change or the like. WDM signals distorted by the dispersion slope of the fiber are introduced into an input waveguide, and are demultiplexed by a wavelength demultiplexer into each wavelength component, and pass through lattice-form optical circuits, transversal-form optical circuits, or the combination of these circuits. The dispersion slope of the signals is compensated for by these circuits. The recovered signals are multiplexed by a wavelength multiplexer, and the multiplexed light is outputted at an output waveguide. Arrayed-waveguide gratings can be used as the wavelength demultiplexer and multiplexer. Also, cascaded configuration of Mach-Zehnder interferometers, bulk-type optical filters, or fiber-type (or waveguide-type) gratings in series can also be used as the wavelength demultiplexer and multiplexer.

    Optical frequency shifter and optical modulator using the same
    7.
    发明授权
    Optical frequency shifter and optical modulator using the same 有权
    光移频器和使用其的光调制器

    公开(公告)号：US08948546B2

    公开(公告)日：2015-02-03

    申请号：US13984480

    申请日：2012-02-15

    申请人： Takashi Saida ,  Hiroshi Yamazaki ,  Takashi Goh ,  Ken Tsuzuki ,  Shinji Mino

    发明人： Takashi Saida ,  Hiroshi Yamazaki ,  Takashi Goh ,  Ken Tsuzuki ,  Shinji Mino

    IPC分类号： G02F1/01 ,  H04B10/50 ,  G02B6/26 ,  G02B6/12 ,  G02F1/03 ,  H04B10/548

    CPC分类号： G02F1/011 ,  H04B10/5053 ,  H04B10/548

    摘要： An object of the present invention is to provide a temperature-independent optical frequency shifter for generating sub-carriers with a miniaturizable configuration, as well as to provide an all-optical OFDM modulator using the same that is compact, has low temperature dependence, and is even compatible with different frequency grids. Provided is an optical frequency shifter and an optical modulator using the same, the optical frequency shifter comprises one input optical port, a 1-input, 2-output optical coupler optically connected thereto, two Mach-Zehnder modulation units individually optically connected to the two outputs thereof, a 2-input, 2-output optical coupler optically connected to the individual outputs thereof, and two output optical ports optically connected to the outputs thereof, wherein the two Mach-Zehnder modulation units are driven by periodic waveforms at the same frequency whose phases differ from each other by (2p+1)π/2 (p: integer).

    摘要翻译： 本发明的目的是提供一种用于产生具有小型化配置的子载波的与温度无关的光学移频器，并且提供使用紧凑的，具有低温度依赖性的全光OFDM调制器，以及 甚至兼容不同的频率网格。 提供一种光学移频器和使用其的光调制器，该光学移频器包括一个输入光端口，与其光学连接的1输入2输出光耦合器，两个马赫 - 曾德调制单元，其光学连接到两个 光耦合到其各个输出的2输入2输出光耦合器和与其输出光学连接的两个输出光端口，其中两个马赫 - 策德尔调制单元以相同频率的周期波形驱动 其相位彼此相差（2p + 1）＆pgr; / 2（p：整数）。

    Waveguide device and module
    8.
    发明授权
    Waveguide device and module 有权
    波导设备和模块

    公开(公告)号：US08625943B2

    公开(公告)日：2014-01-07

    申请号：US12994280

    申请日：2009-05-26

    申请人： Shunichi Soma ,  Takashi Goh ,  Yasuaki Hashizume ,  Masahiro Yanagisawa ,  Takanori Ishikawa ,  Mitsuru Nagano ,  Atsushi Murasawa ,  Masayuki Okuno

    发明人： Shunichi Soma ,  Takashi Goh ,  Yasuaki Hashizume ,  Masahiro Yanagisawa ,  Takanori Ishikawa ,  Mitsuru Nagano ,  Atsushi Murasawa ,  Masayuki Okuno

    IPC分类号： G02B6/26

    CPC分类号： G02B6/12019 ,  G02B2006/12126 ,  G02B2006/12195

    摘要： Excess optical power in a waveguide device is appropriately terminated. According to one embodiment of the present invention, the waveguide device comprises a termination structure filled with a light blocking material for terminating light from the end section of a waveguide. This termination structure can be formed by forming a groove on an optical waveguide by removing the clad and core, and filling the inside of that groove with a material attenuating the intensity of the light (light blocking material). In this manner, light that enters into the termination structure is attenuated by the light blocking material, and influence on other optical devices as a crosstalk component can be suppressed. With such termination structure, not only the influence on optical devices integrated on the same substrate, but also the influence on other optical devices directly connected to that substrate can be suppressed.

    摘要翻译： 适当地终止波导器件中的光功率过大。 根据本发明的一个实施例，波导器件包括填充有阻光材料的端接结构，用于终止来自波导端部的光。 该端接结构可以通过移除包层和芯在光波导上形成凹槽，并用衰减光强度（遮光材料）的材料填充该凹槽的内部来形成。 以这种方式，进入终端结构的光被遮光材料衰减，并且可以抑制对作为串扰分量的其它光学装置的影响。 通过这种端接结构，不仅可以抑制对同一基板上集成的光学器件的影响，还可以抑制对与该基板直接连接的其他光学器件的影响。

    OPTICAL MODULATOR
    9.
    发明申请
    OPTICAL MODULATOR 有权
    光学调制器

    公开(公告)号：US20130011093A1

    公开(公告)日：2013-01-10

    申请号：US13635845

    申请日：2011-03-18

    申请人： Takashi Goh ,  Takashi Yamada ,  Hiroshi Yamazaki ,  Yoshiyuki Doi

    发明人： Takashi Goh ,  Takashi Yamada ,  Hiroshi Yamazaki ,  Yoshiyuki Doi

    IPC分类号： G02F1/035

    CPC分类号： G02F1/225 ,  G02F1/0121 ,  G02F2001/212 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5162 ,  H04B10/54 ,  H04B10/5561 ,  H04L27/206

    摘要： Disclosed is an optical modulator which substantially lowers loss and has little attenuation in the intensity of an optical signal after modulation. The optical modulator includes a 1×2 RZ pulse carver wherein optical phase shifters used for modulation are arranged along two arm waveguides held between a 1×2 coupler and a 2×2 coupler, two interferometric modulators connected respectively to two output ports of the 2×2 coupler, and a 2×1 coupler for combining the outputs of the interferometric modulators.

    摘要翻译： 公开了一种光调制器，其基本上降低了损耗，并且在调制后光信号的强度几乎没有衰减。 光调制器包括1×2 RZ脉冲雕刻机，其中用于调制的光学移相器沿着保持在1×2耦合器和2×2耦合器之间的两个臂波导布置，两个干涉式调制器分别连接到2的两个输出端口 ×2耦合器和用于组合干涉式调制器的输出的2×1耦合器。

    OPTICAL MODULATOR
    10.
    发明申请
    OPTICAL MODULATOR 有权
    光学调制器

    公开(公告)号：US20120106888A1

    公开(公告)日：2012-05-03

    申请号：US13381298

    申请日：2010-07-09

    申请人： Takashi Goh ,  Yoshiyuki Doi ,  Shinji Mino ,  Ken Tsuzuki ,  Hiroshi Yamazaki ,  Takashi Yamada

    发明人： Takashi Goh ,  Yoshiyuki Doi ,  Shinji Mino ,  Ken Tsuzuki ,  Hiroshi Yamazaki ,  Takashi Yamada

    IPC分类号： G02F1/035

    CPC分类号： G02F1/0327 ,  G02B2006/12142 ,  G02B2006/12159 ,  G02F1/225 ,  G02F2201/126 ,  G02F2203/20 ,  G02F2203/21

    摘要： In a nest MZI modulator in which each arm includes a child MZI, the power consumption is reduced. The hybrid integrated-type nest MZI modulator of the embodiment 1a is configured so that, instead of placing a relative phase adjusting section in a parent MZI, a bias electrode Bias 90° in which an electric field is applied in the same direction to the polarization direction in both of the upper and lower arms is placed in each child MZI (see FIG. 4B). The bias electrode Bias 90° provided in each child MZI constitute the entirety of a relative phase adjusting section. The optical signals are subjected to a phase change after the output from the child MZI (see FIG. 1A), because such relative phase adjusting section can subject the optical signals of the upper and lower arms of the child MZI to a shift change in the same direction, respectively.

    摘要翻译： 在其中每个臂包括儿童MZI的巢MZI调制器中，功耗降低。 实施例1a的混合集成型嵌套MZI调制器被配置为使得不是将相对相位调整部分放置在母MZI中，而是将偏置电极偏置90°，其中向与极化相同的方向施加电场 将上臂和下臂两者的方向放置在每个子MZI中（参见图4B）。 每个子MZI中设置的偏置电极偏置90°构成相对相位调整部的整体。 在从子MZI（参见图1A）的输出之后，光信号经受相变，因为这种相对相位调整部分可以使子MZI的上臂和下臂的光信号在 相同方向。