公开(公告)号：US10659153B2

公开(公告)日：2020-05-19

申请号：US16504262

申请日：2019-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD

Inventor： Jian Zhong ,  Zhiping Jiang ,  Rui He

IPC: H04B10/077 ,  G01M11/00 ,  H04B10/27

Abstract: The application provides a method for measuring a dispersion coefficient of an optical fiber. A network device sends a first optical supervisory channel (OSC) measurement signal and a second OSC measurement signal, where wavelengths of the first OSC measurement signal and the second OSC measurement signal are different. The network device receives the returned first OSC measurement signal and second OSC measurement signal, where the first OSC measurement signal and the second OSC measurement signal are transmitted through a first optical fiber and a second optical fiber to return to the network device, and the first optical fiber and the second optical fiber are a to-be-tested optical fiber. The network device determines a delay difference between the received first OSC measurement signal and second OSC measurement signal. The network device determines a dispersion coefficient of the to-be-tested optical fiber based on the delay difference.

公开(公告)号：US20190036600A1

公开(公告)日：2019-01-31

申请号：US15665351

申请日：2017-07-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Xuefeng Tang

IPC: H04B10/079

Abstract: A system for monitoring optical signal-to-noise ratio (OSNR) is provided. In some specific examples, the system may use a pilot tone power of a signal modulated with pilot tone to derive the pure signal power and the variance of the whole electric field to derive the total power (pure signal power plus amplified spontaneous emission (ASE) power of the signal). The ASE power can be obtained by subtracting the pure signal power from the total power (ASE+pure signal). Once the ASE power and the pure signal power are known, the OSNR can be calculated.

公开(公告)号：US20170373748A1

公开(公告)日：2017-12-28

申请号：US15200325

申请日：2016-07-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Tejia Liu ,  Hong Yang ,  Dajiang Jin ,  Minggang Si

IPC: H04B10/077

Abstract: The disclosure is directed at a method and system for optical telecommunications performance monitoring via a dual frequency pilot tone. By applying a dual frequency pilot tone, with a first pilot tone frequency selected from a low frequency band and a second pilot tone frequency selected from a high frequency band, either simultaneously or alternatively, to a wavelength channel, one of the pilot tone frequencies may be adaptively selected to improve wavelength channel monitoring. More specifically, stimulated Raman scattering (SRS) caused crosstalk and chromatic dispersion (CD) caused pilot fading which adversely affect performance monitoring of the wavelength channel may be reduced.

公开(公告)号：US09749723B2

公开(公告)日：2017-08-29

申请号：US14877280

申请日：2015-10-07

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04J14/00 ,  H04Q11/00 ,  H04J14/02 ,  H04B10/25 ,  H04B10/50 ,  H04B10/572

CPC classification number: H04Q11/0005 ,  H04B10/25 ,  H04B10/503 ,  H04B10/572 ,  H04J14/021 ,  H04J14/0275 ,  H04J14/0282 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0018 ,  H04Q2011/0032 ,  H04Q2011/0033 ,  H04Q2011/0039 ,  H04Q2011/0041 ,  H04Q2011/005 ,  H04Q2011/0058

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.

公开(公告)号：US12282096B2

公开(公告)日：2025-04-22

申请号：US17324794

申请日：2021-05-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ali Ahmed Ali Massoud ,  Zhiping Jiang

IPC: G01S17/08 ,  G01S17/88 ,  G06F16/9035 ,  G06F17/14

Abstract: Aspects of the disclosure provide a method of a LiDAR system to determine the distance of an object from the LiDAR system. Embodiments of the LiDAR system can use a coarse estimate of the distance of an object from the LiDAR system which is then used by a fast search to determine an estimate of the distance of an object from the LiDAR system within a precision threshold. In some embodiments the LiDAR system can use adaptive precision when determining the distance of an object from the LiDAR system.

公开(公告)号：US11528050B1

公开(公告)日：2022-12-13

申请号：US17518928

申请日：2021-11-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Xuefeng Tang ,  Junho Chang

IPC: H04B1/44 ,  H04B1/10 ,  H04B1/04 ,  H04B1/54 ,  H04B1/16

Abstract: The disclosed systems and methods for detecting mirror crosstalk between frequency bands equally above and below the center frequency of a Digital Subcarrier Multiplexing system include: a transmitter configured to insert zero-power symbols on half the frequency bands below center frequency, and insert other zero-power symbols, partially overlapping in time with the first zero-power symbols, on the other half of the frequency bands above center frequency. A receiver zeroes out ASE and other noises during the overlapping portion of all the zero-power symbols, then uses the power detected during the remaining portion of each zero-power symbol in each frequency band to accurately evaluate the mirror crosstalk from the corresponding frequency band on the opposite side of center frequency.

公开(公告)号：US10574382B2

公开(公告)日：2020-02-25

申请号：US15995175

申请日：2018-06-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Xuefeng Tang ,  Zhuhong Zhang

IPC: H04J14/02 ,  H04B10/516 ,  H04B10/50 ,  H04B10/077 ,  H04B10/572 ,  H04B10/54 ,  H04B10/548 ,  H04B10/67 ,  H04B10/40 ,  H04B10/60

Abstract: An embodiment method includes multiplexing light emitted by the plurality of optical transmitters to provide a multiplexed optical signal; propagating the multiplexed optical signal through an optical interleaver from a first port thereof to a combined port thereof and back to a second port thereof; and detecting an optical signal at the second port of the optical interleaver.

公开(公告)号：US10432303B2

公开(公告)日：2019-10-01

申请号：US15200325

申请日：2016-07-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Tejia Liu ,  Hong Yang ,  Dajiang Jin ,  Minggang Si

IPC: H04B10/08 ,  H04B10/077 ,  H04J14/02

Abstract: The disclosure is directed at a method and system for optical telecommunications performance monitoring via a dual frequency pilot tone. By applying a dual frequency pilot tone, with a first pilot tone frequency selected from a low frequency band and a second pilot tone frequency selected from a high frequency band, either simultaneously or alternatively, to a wavelength channel, one of the pilot tone frequencies may be adaptively selected to improve wavelength channel monitoring. More specifically, stimulated Raman scattering (SRS) caused crosstalk and chromatic dispersion (CD) caused pilot fading which adversely affect performance monitoring of the wavelength channel may be reduced.

公开(公告)号：US10298323B2

公开(公告)日：2019-05-21

申请号：US15895374

申请日：2018-02-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Zhuhong Zhang ,  Chuandong Li

IPC: H04J14/02 ,  H04B10/11 ,  H04B1/00 ,  H04B10/556 ,  H04L5/00 ,  H04B10/50 ,  H04L25/02

Abstract: The disclosure is directed to a method and system for generating a pilot tone for an optical signal with an optical telecommunications system. The pilot tone is generated in the digital domain by modulating the data to be transmitted to a destination node within the optical telecommunications network. The modulation of the data introduces occurrence modulation to the optical signal.

公开(公告)号：US10263699B2

公开(公告)日：2019-04-16

申请号：US15895374

申请日：2018-02-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Zhuhong Zhang ,  Chuandong Li

IPC: H04J14/02 ,  H04B10/11 ,  H04B1/00 ,  H04B10/556 ,  H04L5/00 ,  H04B10/50 ,  H04L25/02

Abstract: The disclosure is directed to a method and system for generating a pilot tone for an optical signal with an optical telecommunications system. The pilot tone is generated in the digital domain by modulating the data to be transmitted to a destination node within the optical telecommunications network. The modulation of the data introduces occurrence modulation to the optical signal.