公开(公告)号：US20220357515A1

公开(公告)日：2022-11-10

申请号：US17863100

申请日：2022-07-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Juhao LI ,  Jinglong ZHU ,  Yongqi HE ,  Shengling WU ,  Qiang GUO ,  Ruishan CHEN ,  Rui ZHOU

IPC: G02B6/293 ,  G02B6/02

Abstract: An optical fiber filter includes a fiber core, inner cladding, and outer cladding. A refractive index of the fiber core, a refractive index of the inner cladding, and a refractive index of the outer cladding progressively decrease in sequence. The fiber core is configured to transmit at least two mutually different first optical signal modes, the inner cladding is configured to transmit at least two mutually different second optical signal modes, and at least one fiber grating is etched on the fiber core. At least part of optical power of a target first optical signal mode is coupled to only a target second optical signal mode at the fiber grating. The target first optical signal mode is one of the at least two first optical signal modes, and the target second optical signal mode is one of the at least two second optical signal modes.

公开(公告)号：US20230318733A1

公开(公告)日：2023-10-05

申请号：US18332130

申请日：2023-06-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qiang GUO ,  Rui ZHOU ,  Zhiqun YANG ,  Tao XU ,  Yaping LIU ,  Lin ZHANG

IPC: H04J14/04 ,  H04B10/293 ,  H01S3/10 ,  H01S3/067 ,  H01S3/16 ,  H01S3/094

CPC classification number: H04J14/04 ,  H04B10/2939 ,  H04B10/2931 ,  H01S3/10007 ,  H01S3/06758 ,  H01S3/1608 ,  H01S3/094011

Abstract: Embodiments of an optical amplification apparatus are disclosed which include a first optical amplifier, a second optical amplifier, and a mode exchanger. The first optical amplifier is connected to an input port of the mode exchanger, and the second optical amplifier is connected to an output port of the mode exchanger. The first optical amplifier is configured to amplify optical signals carried in a plurality of transmission modes of a few-mode fiber, the plurality of transmission modes of the few-mode fiber may be grouped into N groups, each group includes two transmission modes, and N is a positive integer greater than or equal to 1. The mode exchanger is configured to exchange the two transmission modes carrying optical signals in each group. The second optical amplifier is configured to amplify the optical signals that are carried in the two transmission modes in each group and whose modes are exchanged.