公开(公告)号：US12181370B2

公开(公告)日：2024-12-31

申请号：US17961004

申请日：2022-10-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chao Pan ,  Ziliang Li ,  Ning Deng

IPC: G01M11/00 ,  H04B10/071

Abstract: An optical time-domain reflectometer (OTDR), where a laser emitting apparatus of the OTDR outputs a first optical signal in a first time period. A signal modulation apparatus of the OTDR generates a pulse signal based on the first optical signal, and outputs the pulse signal to an optical fiber in a second time period, where the first time period includes the second time period. A receiver of the OTDR receives a scattered signal from the optical fiber, where a frequency of the scattered signal is the same as a frequency of the first optical signal. Then, the laser emitting apparatus outputs a second optical signal in a third time period, where a frequency of the second optical signal is different from the frequency of the first optical signal. The second optical signal is used as a local oscillator signal to implement coherent detection in the receiver.

公开(公告)号：US11171722B2

公开(公告)日：2021-11-09

申请号：US17097519

申请日：2020-11-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhenhua Dong ,  Chao Pan ,  Zhiyong Feng ,  Xu Zhou

IPC: H04B10/071 ,  H04B10/40 ,  H04B10/61 ,  H04B10/25

Abstract: This application discloses an optical signal transceiver apparatus, and belongs to the communications field. The apparatus includes: an optical signal generation module, configured to generate a to-be-sent optical signal and a local oscillator optical signal, where the to-be-sent optical signal includes an OTDR signal; an optical combining/splitting module, configured to: receive a to-be-processed optical signal from an optical fiber; and input the to-be-processed optical signal into an coherent receiving module; the coherent receiving module, configured to coherently receive the local oscillator optical signal and the to-be-processed optical signal to obtain a to-be-processed electrical signal; a signal processing module, configured to: obtain a first digital signal and a second digital signal from the to-be-processed electrical signal based on a signal frequency; process the first digital signal to obtain a communications code stream; and process the second digital signal to obtain information used to reflect a feature of the optical fiber.

公开(公告)号：US20210320742A1

公开(公告)日：2021-10-14

申请号：US17357468

申请日：2021-06-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Jia ,  Liangjia Zong ,  Bing Zou ,  Lei Mao ,  Chao Pan

IPC: H04J14/02 ,  H04B10/61 ,  H04B10/2569 ,  H04B10/079

Abstract: A polarization-dependent loss (PDL) determining method includes obtaining two groups of optical powers within first duration, selecting at least one group of target optical powers that satisfy a same power constraint from the two groups of optical powers, where each group of target optical powers includes a first target power and a second target power from the two groups of optical powers, and determining a PDL of the optical device based on the at least one group of target optical powers.

公开(公告)号：US11316591B2

公开(公告)日：2022-04-26

申请号：US17150661

申请日：2021-01-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Jia ,  Chao Pan ,  Han Zhao ,  Ning Deng

IPC: H04B10/572 ,  H04B10/077 ,  H04B10/079 ,  H04B10/50 ,  H04B10/548

Abstract: A frequency offset processing method, apparatus, and a storage medium, where the method includes: determining a frequency offset of a preset channel in a wavelength selective switch (WSS); determining a correspondence between a frequency offset and a wavelength or a correspondence between a frequency offset and a pixel position based on the frequency offset of the preset channel; and determining a frequency offset of a traffic channel according to the determined correspondence.

公开(公告)号：US20240056188A1

公开(公告)日：2024-02-15

申请号：US18496264

申请日：2023-10-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Linbojie Huang ,  Chao Pan ,  Kai Zhang

IPC: H04B10/2581 ,  H04B10/564 ,  G02F1/21 ,  G02F1/01

CPC classification number: H04B10/2581 ,  H04B10/564 ,  G02F1/217 ,  G02F1/0121 ,  H01S3/1608

Abstract: Embodiments of this application provide an optical power adjustment system and an optical power adjustment apparatus. The system includes a multi-mode light source, a mode demultiplexer, and an optical power adjustment apparatus. The multi-mode light source is configured to output a multi-mode optical signal, where the multi-mode optical signal includes N transverse-mode optical signals, N=2M, and M is an integer greater than 1. The mode demultiplexer is configured to convert the N transverse-mode optical signals into N fundamental-mode optical signals, and output the N fundamental-mode optical signals. The optical power adjustment apparatus includes M optical power adjustment modules and a control apparatus, each optical power adjustment module includes a plurality of phase shifters, and the control apparatus is electrically connected to the M optical power adjustment modules. A Kth optical power adjustment module includes 2K−1 multi-mode interferometers MMIs.

公开(公告)号：US20210135763A1

公开(公告)日：2021-05-06

申请号：US17150661

申请日：2021-01-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Jia ,  Chao Pan ,  Han Zhao ,  Ning Deng

IPC: H04B10/572 ,  H04B10/079 ,  H04B10/548 ,  H04B10/50 ,  H04B10/077

Abstract: A frequency offset processing method, apparatus, and a storage medium, where the method includes: determining a frequency offset of a preset channel in a wavelength selective switch (WSS); determining a correspondence between a frequency offset and a wavelength or a correspondence between a frequency offset and a pixel position based on the frequency offset of the preset channel; and determining a frequency offset of a traffic channel according to the determined correspondence.

公开(公告)号：US20230031468A1

公开(公告)日：2023-02-02

申请号：US17961004

申请日：2022-10-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chao Pan ,  Ziliang Li ,  Ning Deng

IPC: G01M11/00 ,  H04B10/071

Abstract: An optical time-domain reflectometer (OTDR), where a laser emitting apparatus of the OTDR outputs a first optical signal in a first time period. A signal modulation apparatus of the OTDR generates a pulse signal based on the first optical signal, and outputs the pulse signal to an optical fiber in a second time period, where the first time period includes the second time period. A receiver of the OTDR receives a scattered signal from the optical fiber, where a frequency of the scattered signal is the same as a frequency of the first optical signal. Then, the laser emitting apparatus outputs a second optical signal in a third time period, where a frequency of the second optical signal is different from the frequency of the first optical signal. The second optical signal is used as a local oscillator signal to implement coherent detection in the receiver.

公开(公告)号：US11343010B2

公开(公告)日：2022-05-24

申请号：US17357468

申请日：2021-06-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Jia ,  Liangjia Zong ,  Bing Zou ,  Lei Mao ,  Chao Pan

IPC: H04B10/00 ,  H04J14/02 ,  H04B10/079 ,  H04B10/2569 ,  H04B10/61

Abstract: A polarization-dependent loss (PDL) determining method includes obtaining two groups of optical powers within first duration, selecting at least one group of target optical powers that satisfy a same power constraint from the two groups of optical powers, where each group of target optical powers includes a first target power and a second target power from the two groups of optical powers, and determining a PDL of the optical device based on the at least one group of target optical powers.