公开(公告)号：US20220390530A1

公开(公告)日：2022-12-08

申请号：US17834201

申请日：2022-06-07

申请人： Shanghai University

发明人： Tingyun Wang ,  Yi Huang ,  Chuanlu Deng ,  Chengyong Hu

IPC分类号： G01R33/032 ,  G01D5/353

摘要： Disclosed are a system and a method for measuring a magnetorefractive effect of an optical fiber. The system comprises a laser, a coupler A, a sensing optical fiber, a reference optical fiber, a carrier generator, a coupler B, a photoelectric detector and a data acquisition and processing module. The coupler A, the sensing optical fiber, the reference optical fiber and the coupler B form a Mach-Zehnder optical fiber interferometer. An external magnetic field influences the refractive index of the sensing optical fiber, so that the optical path difference between two paths of optical signals in the sensing optical fiber and the reference optical fiber is changed, the intensity of an interference optical signal output by the coupler B is changed, and the refractive index change of the sensing optical fiber under the action of the magnetic field is measured by detecting and processing the interference optical intensity.

公开(公告)号：US11906603B2

公开(公告)日：2024-02-20

申请号：US17834201

申请日：2022-06-07

申请人： Shanghai University

发明人： Tingyun Wang ,  Yi Huang ,  Chuanlu Deng ,  Chengyong Hu

IPC分类号： G01D5/353 ,  G01R33/032

CPC分类号： G01R33/032 ,  G01D5/35329

摘要： Disclosed are a system and a method for measuring a magnetorefractive effect of an optical fiber. The system comprises a laser, a coupler A, a sensing optical fiber, a reference optical fiber, a carrier generator, a coupler B, a photoelectric detector and a data acquisition and processing module. The coupler A, the sensing optical fiber, the reference optical fiber and the coupler B form a Mach-Zehnder optical fiber interferometer. An external magnetic field influences the refractive index of the sensing optical fiber, so that the optical path difference between two paths of optical signals in the sensing optical fiber and the reference optical fiber is changed, the intensity of an interference optical signal output by the coupler B is changed, and the refractive index change of the sensing optical fiber under the action of the magnetic field is measured by detecting and processing the interference optical intensity.

公开(公告)号：US11221556B2

公开(公告)日：2022-01-11

申请号：US17014714

申请日：2020-09-08

申请人： Shanghai University

发明人： Tingyun Wang ,  Chuanlu Deng ,  Xueting Wang ,  Yi Huang ,  Xiaobei Zhang

IPC分类号： G03F7/20 ,  G03F7/00 ,  G02B6/13 ,  G03F1/38 ,  G03F7/16 ,  G02B6/12

摘要： Disclosed is a method for fabricating a spherical concave mirror in an optical waveguide based on ultraviolet (UV) grayscale lithography. A key component is a specially designed mask pattern composed of a rectangle as well as a semicircle adjacent to the rectangle, where a rectangular area has no grayscale distribution, and UV light penetrating through different portions of the rectangular area has the same intensity; a semicircular area has the grayscale distribution, and the UV light penetrating through the semicircular area with the grayscale distribution is changed in intensity from the center of a circle in the radius direction according to a special function distribution law; an interlayer photoresist in the rectangular area is irradiated by the UV light penetrating through a mask plate and is developed to form an optical waveguide core.