公开(公告)号：US10148351B2

公开(公告)日：2018-12-04

申请号：US15074243

申请日：2016-03-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhiping Jiang ,  Minggang Si ,  Dajiang Jin ,  Xiaodong Luo ,  Jianhong Ke

IPC: H04B10/077 ,  H04B10/69 ,  H04J14/02 ,  H04B10/516

Abstract: A system monitors optical performance of an optical link within an optical network. The system includes an optical transmitter having an expanded-spectrum pilot-tone modulator for modulating an expanded-spectrum pilot tone onto a high-speed data signal to generate an expanded-spectrum optical signal and an optical receiver for receiving the expanded-spectrum optical signal and for detecting and decoding the expanded-spectrum pilot tone to enable monitoring of the optical performance of the optical link.

公开(公告)号：US12237866B2

公开(公告)日：2025-02-25

申请号：US18183256

申请日：2023-03-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Jiachuan Lin ,  Behnam Naghdi

IPC: H04B10/07 ,  H04B10/071 ,  H04B10/077 ,  G01M11/00 ,  H04B10/03 ,  H04B10/032 ,  H04B10/25 ,  H04J14/02

Abstract: The disclosed systems, and methods for detecting an improper protection in an optical communication network comprising: i) receiving, by a first Coherent-Optical Time Domain Reflectometer (C-OTDR), a first reflected optical signal from a first optical fiber; ii) receiving, by a second C-OTDR, a second reflected optical signal from a second optical fiber; iii) pre-processing, by a processor, the first reflected optical signal and the second reflected optical signal; iv) determining, by the processor, a category of the first C-OTDR and the second C-OTDR; v) depending upon the category of the first C-OTDR and the second C-OTDR, computing a correlation between the first preprocessed reflected optical signal and the second preprocessed reflected optical signal based on a first correlation computation technique or a second correlation computation technique; and vi) based on the computed correlation, detecting the improper protection in the optical communication network.

公开(公告)号：US11768274B2

公开(公告)日：2023-09-26

申请号：US16921174

申请日：2020-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ali Ahmed Ali Massoud ,  Zhiping Jiang ,  Haitao Sun

IPC: G01S7/481 ,  G01S17/10 ,  G01S17/931 ,  G01S7/486 ,  B60R11/00

CPC classification number: G01S7/4817 ,  G01S7/486 ,  G01S7/4814 ,  G01S7/4816 ,  G01S17/10 ,  G01S17/931 ,  B60R11/00 ,  B60R2011/004 ,  B60R2011/0026 ,  B60R2011/0049

Abstract: The disclosed systems, structures, and methods are directed to a LiDAR system comprising a radiation source configured to emit light pulses towards a region of interest (ROI), a detector configured to detect light pulses reflected from the ROI, a processor, communicatively coupled to the radiation source and the detector, configured to cause the radiation source to emit a preamble light pulse having an energy EP and a pulse width W1 towards the ROI, determine, if the preamble light pulse is detected by the detector and whether there is an object in the ROI, responsive to a determination that there is an object in the ROI, cause the radiation source to emit a scanning light pulse having an energy EL and a pulse width W2 towards the ROI, else the radiation source to emit a scanning light pulse having an energy EH and the pulse width W2 towards the ROI.

公开(公告)号：US11757555B2

公开(公告)日：2023-09-12

申请号：US17521984

申请日：2021-11-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Jun Luo ,  Haitao Sun

IPC: H04B10/071 ,  H04J14/02

CPC classification number: H04J14/0227 ,  H04B10/071 ,  H04J14/0212 ,  H04J14/0213

Abstract: The disclosed systems, structures, and methods are directed to an optical transceiver, employing a first optical time domain reflectometer (OTDR) module configured to generate a first OTDR signal, and a second OTDR signal, the second OTDR signal being a delayed version of the first OTDR signal, a first optical supervisory channel (OSC) transmitter configured to generate a first OSC signal, and a second OSC signal, the second OSC signal being a delayed version of the first OSC signal, a first wavelength division multiplexer (WDM) configured to transmit the first OSC signal interleaved with the first OTDR signal on a first optical fiber and a second WDM configured to transmit the second OSC signal interleaved with the second OTDR signal on a second optical fiber.

公开(公告)号：US11652547B2

公开(公告)日：2023-05-16

申请号：US17484668

申请日：2021-09-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Simin Wang

IPC: H04B10/079 ,  H04J14/02

CPC classification number: H04B10/07953 ,  H04J14/021

Abstract: A method to determine the types of optical fibers forming a link of an optical communication network. By scanning a signal's bit error rate at a receiver end, as a function of a pre-dispersion applied to a signal at a transmitter end, local minimums in the curve indicate the presence of amplifiers, and therefore fiber span extremities. By determining the accumulated dispersion at each fiber extremity, a ratio of dispersion per span length can be obtained and the span's coefficient of chromatic dispersion be inferred, thereby identifying the type of fiber. Alternatively, a signal's signal-to-noise ratio can be scanned, instead of its bit error rate. In a typical network, the required instrumentation is pre-existing.

公开(公告)号：US11522617B1

公开(公告)日：2022-12-06

申请号：US17665945

申请日：2022-02-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Jiachuan Lin

IPC: H04B10/00 ,  H04B10/61 ,  H04J14/00 ,  H04B10/63

Abstract: A system for laser phase noise compensation for a fibered communication path, the system being configured for connection with a node of the fibered communication path, including at least one signal splitter optically coupled to a laser source of the fibered communication path, the at least one signal splitter having two output communication path, the communication paths having a path difference therebetween; an integrated coherent receiver (ICR) optically coupled to the first output communication path and the second output communication path; and a digital signal processor (DSP) communicatively connected to the ICR, the ICR being configured to determine, based signals received from the first and second output communication paths, at least one phase noise indication related to phase noise of the laser source, the DSP being configured to determine an estimated laser phase noise based on at least the at least one phase noise indication.

公开(公告)号：US11108463B1

公开(公告)日：2021-08-31

申请号：US16878214

申请日：2020-05-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Ali Salehiomran ,  Yasser Chiniforooshan

IPC: H04B10/00 ,  H04B10/079 ,  H04B10/61 ,  H04B10/532

Abstract: The disclosed systems, structures, and methods are directed to an optical communication system. The optical communication system comprising an optical node configured to receive a light signal, in which the light signal is received from a first optical path and a second optical path, and the optical node is further configured to determine a change in state of polarization (SOP) of the light signal received from the first optical path and the second optical path, a processing unit configured to determine if at least a portion of the first optical path and the second optical path has a/similar change in SOP.

公开(公告)号：US11057142B1

公开(公告)日：2021-07-06

申请号：US16921034

申请日：2020-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang

IPC: H04B10/079 ,  H04J14/02

Abstract: The disclosed systems, structures, and methods are directed to an optical communication comprising a first wavelength division multiplexer (WDM) configured to receive WDM signals, the first WDM is further configured to split the received WDM signals into C band WDM signals and L band WDM signals, a C band amplifier configured and an L band amplifier configured to amplify the C band WDM signals and L band WDM signals respectively and compute a fast total instantaneous powers Ptot-CBand(t) and Ptot-LBand(t) on a fast time scale, a slow per channel power detector configured to extract slow per channel powers P(λ1), P(λ2) . . . P(λn) on a slow time scale, a Stimulated Raman Scattering (SRS) estimator configured to estimate an SRS induced gain change in the WDM signals, and a second WDM configured to combine and transmit the amplified C band WDM signals and L band WDM signals over optical cables.

公开(公告)号：US10965371B2

公开(公告)日：2021-03-30

申请号：US16829744

申请日：2020-03-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang ,  Ali Salehiomran

IPC: H04B10/079 ,  H04B10/40 ,  G06N3/04 ,  H04B10/58 ,  H04B10/61 ,  H04B10/25

Abstract: A method, transceiver, and system for monitoring performance of a fiber optic-based communication network and, in particular to determining contributing linear and nonlinear noise components, is disclosed. The method includes computing fast bit error rate of a received optical signal at a sampling time interval that is less than or equal to 100 microseconds (μsecs), generating, over a time period, a bit error rate distribution data associated with the computed fast bit error rate, applying statistical measurements to the bit error rate distribution data to extract statistical attribute data of the bit error rate distribution data, processing the extracted statistical attribute data to separately determine nonlinear noise components and linear noise components that contribute to total noise levels, and changing a launch power associated with an optical signal to be transmitted in accordance with separately determined nonlinear noise components and linear noise components.

公开(公告)号：US10554299B2

公开(公告)日：2020-02-04

申请号：US15590168

申请日：2017-05-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhiping Jiang

IPC: H04B10/079

Abstract: In some examples, an apparatus receives a first measurement of a plurality of wavelength channels obtained at a first location of an optical medium, and a second measurement of the plurality of wavelength channels obtained at a second location of the optical medium. The apparatus computes a value relating to dispersion in the optical medium by correlating the first measurement and the second measurement.