公开(公告)号：US12197008B2

公开(公告)日：2025-01-14

申请号：US17854585

申请日：2022-06-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qiang Guo ,  Rui Zhou ,  Zhiqun Yang ,  Lin Zhang

IPC: G02B6/14 ,  H04J14/04

Abstract: A communication system is provided. The communication system may include few mode fibers of at least two spans and a mode converter. The few mode fiber is configured to transmit M received mode groups, where group delays of the M mode groups during transmission in the few mode fiber are symmetrically distributed about a center. The mode converter is configured to: receive the M mode groups from the few mode fiber, perform mode group exchange between a first mode group and a second mode group in the M mode groups to obtain M exchanged mode groups, where a group delay of the first mode group and a group delay of the second mode group are symmetric about the center.

公开(公告)号：US20220329035A1

公开(公告)日：2022-10-13

申请号：US17851307

申请日：2022-06-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lin Zhang ,  Yaping Liu ,  Zhiqun Yang ,  Qiang Guo ,  RUI ZHOU

IPC: H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/16

Abstract: A fiber amplifier is provided, including a pump laser (202), a pump and signal combiner (203), and a few-mode doped fiber (204). The pump laser (202) is configured to output pump light. The pump and signal combiner (203) is configured to couple input few-mode signal light and the pump light into the few-mode doped fiber (204). Refractive indexes of a fiber core of the few-mode doped fiber (204) are distributed to be gradient along a radial direction of a cross section, the fiber core is etched with periodic gratings along an axial direction, and periods of the gratings satisfy a phase matching condition. The fiber amplifier achieves strong coupling and co-amplification between optical signal modes, thereby reducing a differential gain between mode groups.

公开(公告)号：US20240361516A1

公开(公告)日：2024-10-31

申请号：US18770283

申请日：2024-07-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lin Zhang ,  Yuping Wu ,  Bofang Zheng ,  Yang Wang ,  Zhiqun Yang

IPC: G02B6/02 ,  G02B6/12 ,  H04B10/61

CPC classification number: G02B6/02042 ,  G02B6/02038 ,  H04B10/616 ,  G02B2006/12061

Abstract: A light receiving module is provided, including a beam contraction module, a multi-core multi-mode waveguide, and a detector. The beam contraction module is configured to receive a first optical signal, and contract a mode spot of the first optical signal, to obtain a second optical signal. The multi-core multi-mode waveguide includes a cladding layer and N waveguides. The multi-core multi-mode waveguide is configured to: receive the second optical signal, and concentrate energy of the second optical signal in a plurality of waveguides of the N waveguides, to obtain a plurality of third optical signals. A plurality of sub-detectors are in one-to-one correspondence with the plurality of third optical signals. The plurality of sub-detectors are configured to receive the plurality of third optical signals, to obtain a plurality of electrical signals based on the plurality of third optical signals.

公开(公告)号：US20240077382A1

公开(公告)日：2024-03-07

申请号：US18506628

申请日：2023-11-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Guo ,  Rui Zhou ,  Zhiqun Yang

IPC: G01M11/00

CPC classification number: G01M11/3127 ,  G01M11/319

Abstract: An optical fiber measurement system includes an optical time-domain reflectometer, a wavelength division multiplexer, and a signal generator. The signal generator sends a signal light ray to the wavelength division multiplexer. The optical time-domain reflectometer sends two measurement light rays whose wavelengths are respectively longer than and shorter than a wavelength of the signal light ray to the wavelength division multiplexer. The wavelength division multiplexer combines the two measurement light rays and the signal light ray, sends a combined light ray to an optical fiber, and sends a light ray returned by the optical fiber to the optical time-domain reflectometer, so that the optical time-domain reflectometer determines performance of the optical fiber based on the returned light ray.