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    BROADBAND INTERFEROMETER TYPE POLARIZED LIGHT COMBINER AND SPLITTER
    3.
    发明公开
    BROADBAND INTERFEROMETER TYPE POLARIZED LIGHT COMBINER AND SPLITTER 有权
    麻醉师麻醉师智能干扰仪

    公开(公告)号：EP2439566A1

    公开(公告)日：2012-04-11

    申请号：EP10783151.3

    申请日：2010-06-02

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： MIZUNO, Takayuki ,  GOH, Takashi ,  YAMAZAKI, Hiroshi ,  KAMEI, Shin ,  KITOH, Tsutomu

    IPC分类号： G02B6/126

    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; 以及连接到光耦合器的两个输入/输出端口。 对于光路长度差分赋予单元，将两个偏振态之间的波长的半整数设为归一化相位差，并且在两个偏振态之间设置用于产生折射率色散差的装置 光路长度差分赋予单元，因此抑制两个偏振态的透射率相对于波长的变化率。

    SIGNAL GENERATING DEVICE
    4.
    发明公开
    SIGNAL GENERATING DEVICE 审中-公开

    公开(公告)号：EP3343778A1

    公开(公告)日：2018-07-04

    申请号：EP16838797.5

    申请日：2016-08-19

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： YAMAZAKI, Hiroshi ,  NAGATANI, Munehiko ,  NOSAKA, Hideyuki ,  SANO, Akihide ,  MIYAMOTO, Yutaka

    IPC分类号： H03M1/66 ,  H04J11/00

    CPC分类号： H03M1/74 ,  H03M1/66 ,  H04J11/00 ,  H04J11/0036 ,  H04J11/0056 ,  H04L27/263 ,  H04L27/2634

    摘要： A DAC on a conventional CMOS platform has an analog output bandwidth of about 15 GHz, which is insufficient and causes one of bottlenecks in realizing the increase of capacity for communication systems. In the conventional technique, only an output having a bandwidth identical to the bandwidth of individual DACs has been obtained even by using a plurality of DACs. Also, even when the output of a bandwidth broader than the individual DAC is obtained, there has been a problem associated with asymmetricity of a circuit configuration. In a signal generating device of the present invention, a plurality of normal DACs are combined to realize an analog output of a broader bandwidth beyond the output bandwidth of the individual DACs, and the problem of the asymmetricity of the circuit configuration is also resolved. A desired signal is separated into a low-frequency signal and a high-frequency signal in a frequency domain, and a series of operation of constant (r)-folding the amplitude of the high-frequency signal and shifting it on the frequency axis to superimpose it on the low-frequency signal are made in a digital domain. The output of each DAC is switched by an analog multiplexer. A configuration example adapted to occurrence of a multicarrier signal is also disclosed.

    OPTICAL MODULATOR
    5.
    发明公开
    OPTICAL MODULATOR 有权
    OPTISCHER调制器

    公开(公告)号：EP2453295A1

    公开(公告)日：2012-05-16

    申请号：EP10796926.3

    申请日：2010-07-09

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： GOH, Takashi ,  DOI, Yoshiyuki ,  MINO, Shinji ,  TSUZUKI, Ken ,  YAMAZAKI, Hiroshi ,  YAMADA, Takashi

    IPC分类号： G02F1/035 ,  G02B6/12 ,  G02B6/122

    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 in both of a relative phase adjusting section itself for adjusting the relative phase of an optical signal from a child MZI and the driving circuit of a relative phase adjusting section 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 Bias90° in which an electric field is applied in the same direction (or in an opposite direction) to the polarization direction in both of the upper and lower arms and a GND electrode are placed in each child MZI (see Fig. 4B ). The bias electrode Bias90° and the GND electrode 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： 在其中每个臂包括子MZI的嵌套MZI调制器中，用于调整来自子MZI的光信号的相对相位和相对相位调节部分的驱动电路的相对相位调整部分本身的功耗是 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母相MZI中的相对相位调整部分放置在相同方向上施加电场的偏置电极Bias90° 相反方向）和上臂和下臂中的偏振方向，并且将GND电极放置在每个子MZI中（参见图4B）。 每个子MZI中设置的偏置电极Bias90°和GND电极构成相对相位调整部的整体。 光信号在从子MZI（参见图1A）的输出之后经历相变，因为这种相对相位调整部分可以使儿童MZI的上臂和下臂的光信号在 相同方向。