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    System and Method for Optical Network
    21.
    发明申请
    System and Method for Optical Network 审中-公开
    光网络系统与方法

    公开(公告)号：US20160323660A1

    公开(公告)日：2016-11-03

    申请号：US15205670

    申请日：2016-07-08

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Zhiping Jiang ,  Chen Chen ,  Zhuhong Zhang ,  Chuandong Li

    IPC: H04Q11/00 ,  H04B10/50 ,  H04B10/572 ,  H04B10/25

    Abstract: An optical circuit switching matrix includes a plurality of optical ports, each optical port being optically coupled to a respective one of a plurality of user nodes and an optical coupler having at least one input port optically coupled to the plurality of optical ports, and an output port. The optical circuit switching matrix also includes a wavelength demultiplexer having an input optically coupled to the output port of the optical coupler, and a plurality of output ports, each output port being optically coupled to a respective one of the plurality of optical ports.

    Abstract translation: 光学电路切换矩阵包括多个光学端口，每个光学端口光耦合到多个用户节点中的相应一个用户节点，以及光耦合器，该光耦合器具有光耦合到多个光学端口的至少一个输入端口，以及输出端 港口。 光电路切换矩阵还包括具有光耦合到光耦合器的输出端口的输入的波长解复用器和多个输出端口，每个输出端口光耦合到多个光端口中的相应一个光端口。

    Apparatus and Method for OTDR Transmitter Noise Compensation
    22.
    发明申请
    Apparatus and Method for OTDR Transmitter Noise Compensation 有权
    OTDR发射机噪声补偿装置及方法

    公开(公告)号：US20160277101A1

    公开(公告)日：2016-09-22

    申请号：US14872484

    申请日：2015-10-01

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Zhiping Jiang ,  Demin Yao ,  Xiaodong Luo ,  Yansui Huang

    IPC: H04B10/077 ,  H04B10/071

    CPC classification number: H04B10/0775 ,  G01M11/00 ,  G01M11/3118 ,  H04B10/071

    Abstract: An optical device with integrated Optical Time Domain Reflectometer (OTDR) functionality and method for the same is provided. The optical device includes a transmitter and an Optical Time Domain Reflectometer (OTDR) module, The transmitter is configured to generate an Optical Time Domain Reflectometer (OTDR)-modulated optical supervisory channel (OSC) signal by applying an OTDR modulation to an optical supervisory channel (OSC) signal using an OTDR signal and to transmit the OTDR-modulated OSC signal. The OTDR module is configured to generate the OTDR signal, to monitor a returned light signal, to determine transmitter noise compensation information, and to generate OTDR trace information using transmitter noise compensation information and the monitored returned light signal.

    Abstract translation: 提供了具有集成光时域反射计（OTDR）功能的光学器件及其方法。 光学装置包括发射机和光时域反射计（OTDR）模块。发射机被配置为通过向光监控信道应用OTDR调制来产生光时域反射计（OTDR）调制的光监控信道（OSC）信号 （OSC）信号，并发送OTDR调制的OSC信号。 OTDR模块被配置为生成OTDR信号，监视返回的光信号，以确定发射机噪声补偿信息，并使用发射机噪声补偿信息和监视的返回光信号来产生OTDR跟踪信息。

    Transmitter apparatus and method
    24.
    发明授权
    Transmitter apparatus and method 有权
    变送器装置及方法

    公开(公告)号：US09419719B2

    公开(公告)日：2016-08-16

    申请号：US14219799

    申请日：2014-03-19

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Zhiping Jiang ,  Chen Chen ,  Zhuhong Zhang ,  Chuandong Li

    IPC: H04J14/02 ,  H04B10/532 ,  H04B10/556 ,  H04B10/50

    CPC classification number: H04B10/532 ,  H04B10/506 ,  H04B10/548 ,  H04B10/5561 ,  H04B10/5563 ,  H04J14/02

    Abstract: An apparatus comprises a digital signal processing module configured to receive a data stream and generate a plurality of digital multiple tones, a plurality of digital-to-analog converters coupled to the digital signal processing module, a plurality of drivers coupled to respective digital-to-analog converters, an electro-optic modulator having inputs coupled to the drivers and outputs coupled to a fiber and a multi-wavelength light source coupled to the electro-optic modulator.

    Abstract translation: 一种装置包括数字信号处理模块，被配置为接收数据流并产生多个数字多音调，多个数模转换器耦合到数字信号处理模块，多个驱动器耦合到相应的数字 - - 光谱调制器，其具有耦合到驱动器的输入和耦合到光纤的输出和耦合到电光调制器的多波长光源的电光调制器。

    Systems and methods for monitoring generalized optical signal-to-noise ratio
    25.
    发明授权
    Systems and methods for monitoring generalized optical signal-to-noise ratio 有权

    公开(公告)号：US11716138B2

    公开(公告)日：2023-08-01

    申请号：US17503712

    申请日：2021-10-18

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Choloong Hahn

    IPC: H04B17/00 ,  H04B10/079

    CPC classification number: H04B10/0795

    Abstract: The disclosed systems and methods for monitoring, by a coherent optical monitor (OPM), generalized optical signal-to-noise ratio (gOSNR) of an optical channel, the method comprising: i) receiving, by an input port of the coherent OPM, a first signal and a second signal, wherein: the first signal and the second signal include same data, the first signal is an optical signal received from the optical channel, and the first signal is affected by a noise; ii) processing, by a digital signal processor (DSP) of the coherent OPM, the first signal and the second signal and extract the data from the first signal and the second signal; iii) computing, by the DSP, a first correlation between the data from the first signal and the data from the second digital signal; and iv) computing, by the DSP, a first gOSNR based on the first correlation.

    Systems and methods for improving a launch power in an optical link
    26.
    发明授权
    Systems and methods for improving a launch power in an optical link 有权

    公开(公告)号：US11671174B1

    公开(公告)日：2023-06-06

    申请号：US17675491

    申请日：2022-02-18

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang

    IPC: H04B10/079 ,  H04B10/61

    CPC classification number: H04B10/07953 ,  H04B10/6161

    Abstract: The disclosed systems and methods for improving a launch power in an optical link. The improvement of launch power in the optical link is based on: i) selecting an optical span from one or more optical spans within the optical link; ii) applying a power dither to a plurality of the optical signals propagating in the selected optical span; iii) selecting an optical signal from the plurality of the optical signals to which the power dither is applied; iv) correlating the power dither with a performance parameter of the selected optical signal; and v) based on the correlation, adjusting the launch power of a first optical amplifier in the selected optical span to minimize the correlation to approximately equal to zero.

    Monitoring performance of optical network using low-power gaps and a pilot tone
    28.
    发明授权
    Monitoring performance of optical network using low-power gaps and a pilot tone 有权

    公开(公告)号：US10938484B2

    公开(公告)日：2021-03-02

    申请号：US16586392

    申请日：2019-09-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Xuefeng Tang

    IPC: H04B10/08 ,  H04B10/61 ,  H04J14/02 ,  H04B10/079

    Abstract: The disclosed systems, structures, and methods are directed to monitoring performance of optical networks. Transmitted and received optical channel signal has both low-power gaps and an amplitude modulation pilot tone applied. The low-power gaps are applied at a gap frequency with gap power being lower than a signal power of the optical channel signal. The pilot tone is applied to the optical channel signal at a pilot tone modulation frequency, which is different from the gap frequency. Described methods include determining pilot tone modulation depth based on detected gap power in low-power gaps of the received optical channel signal. Amplifier spontaneous emission and nonlinear noise in optical link are detected separately. This permits determining and monitoring of optical signal-to-noise ratio.

    Methods and apparatuses for controlling optical signals in optical networks
    30.
    发明授权
    Methods and apparatuses for controlling optical signals in optical networks 有权

    公开(公告)号：US10673528B1

    公开(公告)日：2020-06-02

    申请号：US16284414

    申请日：2019-02-25

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Chuandong Li ,  Zhuhong Zhang

    IPC: H04B10/2507 ,  H04B10/50 ,  H04B10/40 ,  H04B10/60 ,  H04B10/112 ,  H04B10/116 ,  H04B10/114 ,  H04B10/11

    Abstract: The disclosed systems, apparatuses and methods are directed to controlling optical channel signal and an optical network equipment in optical networks. The methods comprise adjusting an optical channel spectrum based on bit error rates (BER) measured for a dithered optical channel signal. The optical channel spectrum is dithered such that a signal reference frequency is alternated between a first second signal reference frequency and a second signal reference frequency. BER is measured and analysed separately for the dithered signal reference frequency being detuned to the first and to the second signal reference frequencies. Based on a BER difference between BER at the first signal reference frequency and BER at the second signal reference frequency, the optical channel spectrum is shifted with regards to frequency in order to improve optical network performance.

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