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    • 8. 发明授权
    • Optical transmission system and optical transmission method
    • 光传输系统和光传输方式
    • US08699884B2
    • 2014-04-15
    • US13137933
    • 2011-09-21
    • Takashi ToyomakiMotoyoshi Sekiya
    • Takashi ToyomakiMotoyoshi Sekiya
    • H04J14/02
    • H04B10/0773H04B2210/074H04J14/0212H04J14/0227H04J14/0258H04J14/0276
    • An optical transmission system includes a plurality of optical nodes that transmits wavelength multiplexing light including a plurality of signal light components having different wavelengths, wherein each of the optical nodes includes superimposed signal light generation circuit which superimposes a low frequency signal having a common frequency on a corresponding signal light component included in the wavelength multiplexing light; low frequency signal extraction circuit which extracts a low frequency signal having a frequency of a given range from a corresponding signal light component; and pass-through node number measurement circuit which measures, for each of the signal light components, a pass-through node number based on the frequency of the low frequency signal extracted by the low frequency signal extraction circuit, the pass-through node number being the number of optical nodes through which the signal light component has passed before being transmitted to a specific optical node.
    • 一种光传输系统包括多个发送包括具有不同波长的多个信号光分量的波分复用光的光节点,其中每个光节点包括叠加信号光生成电路,该电路将具有共同频率的低频信号叠加在 包括在波长复用光中的相应信号光分量; 低频信号提取电路,从对应的信号光分量中提取具有给定范围的频率的低频信号; 以及直通节点号测量电路,对于每个信号光分量,测量基于由低频信号提取电路提取的低频信号的频率的直通节点数,直通节点数为 信号光分量在被传输到特定光节点之前经过的光节点的数量。
    • 9. 发明授权
    • Optical apparatus using polarized orthogonal control
    • 光学装置采用极化正交控制
    • US08670665B2
    • 2014-03-11
    • US11950222
    • 2007-12-04
    • Takashi ToyomakiNoriaki MizuguchiYoichi Oikawa
    • Takashi ToyomakiNoriaki MizuguchiYoichi Oikawa
    • H04B10/00H04B10/532
    • H04B10/532H04J14/02H04J14/06
    • An optical apparatus comprising, converting units converting electrical signals into signal lights with different wavelength, polarization control units controlling polarizing states of the signal lights into polarization controlled lights respectively, an optical multiplexer multiplexing the polarization controlled lights into a multiplexed light, an optical branching unit branching the multiplexed light and outputting a branched light, a polarizing unit extracting only signal lights of the specified polarizing state from the branched light into an extracted light, and a control unit detecting intensity of the extracted light. Pilot signals are applied to modulate the electrical signals or the polarization controls. The polarization control units controls the polarizing states of the signal lights based on the pilot signal frequencies of the detection result by the control unit.
    • 一种光学装置,包括:将电信号转换成具有不同波长的信号光的单元,分别将信号光的偏振状态分别控制为偏振控制光的偏振控制单元,将多路复用光转换为多路复用光的光学多路复用光;光分路单元 分支多路复用光并输出分支光;偏振单元,其将仅从分支光的指定偏振状态的信号光提取到提取的光中;以及控制单元,其检测所提取的光的强度。 应用导频信号来调制电信号或极化控制。 偏振控制单元基于控制单元的检测结果的导频信号频率来控制信号光的偏振状态。
    • 10. 发明授权
    • Detecting abnormality in an optical receiver
    • 检测光接收机的异常
    • US07991301B2
    • 2011-08-02
    • US12058271
    • 2008-03-28
    • Noriaki MizuguchiTakashi ToyomakiYoshikazu TerayamaKenichi Kaburagi
    • Noriaki MizuguchiTakashi ToyomakiYoshikazu TerayamaKenichi Kaburagi
    • H04B10/00
    • H04B10/677H04B10/0799
    • An optical apparatus comprising: a branching unit branching an input light modulated by DQSPK format and thereby outputting a first branched light and a second branched light; a first branch and a second branch inputting the first branched light and the second branched light, respectively, the first branch and the second branch having an interferometer, a photo detector, and discriminator and demodulating I-signal and Q-signal, respectively; and an abnormality detection unit detecting an abnormality of the input light based on a synchronized detection of a first demodulated signal output from the photo detector in the first branch and a first recovered signal output from the discriminator in the first branch, and a synchronized detection of a second demodulated signal output from the photo detector in the second branch and a second recovered signal output from the discriminator in the second branch.
    • 一种光学装置,包括:分支单元,分支由DQSPK格式调制的输入光,从而输出第一分支光和第二分支光; 第一分支和第二分支分别输入第一分支光和第二分支光,第一分支和第二分支具有干涉仪,光电检测器和鉴别器,并分别解调I信号和Q信号; 以及异常检测单元,基于从第一分支中的光电检测器输出的第一解调信号和第一分支中从鉴别器输出的第一恢复信号的同步检测,检测输入光的异常,以及同步检测 从第二分支中的光电检测器输出的第二解调信号和从第二分支中的鉴别器输出的第二恢复信号。