公开(公告)号：US10859607B2

公开(公告)日：2020-12-08

申请号：US16275939

申请日：2019-02-14

Applicant: ABB Power Grids Switzerland AG

Inventor： Georg Müller ,  Klaus Bohnert ,  Andreas Frank ,  Philippe Gabus

IPC: G01R15/24 ,  G01R19/32

Abstract: A fiber optic sensor and related method are described, with the sensor including a cross-coupling element in the optical path between a polarizing element and a sensing element, but separated from the sensing element itself; with the cross-coupling element generating a defined cross-coupling between the two orthogonal polarization states of the fundamental mode of a polarization maintaining fiber guiding light from the light source to the sensing element thus introducing a wavelength-dependent or temperature-dependent sensor signal shift to balance wavelength-dependent or temperature-dependent signal shifts due to other elements of the sensor, particularly signal shifts due to the wavelength dependence of the Faraday effect or the electro-optic effect constant.

公开(公告)号：US20210116641A1

公开(公告)日：2021-04-22

申请号：US17041098

申请日：2019-04-02

Applicant: ABB Power Grids Switzerland AG

Inventor： Xun Gu ,  Philippe Gabus

IPC: G02B6/255 ,  G01R15/24 ,  G01R19/00

Abstract: The invention relates to a spliced optical fiber comprising a first and second polarization-maintaining optical fiber connected at ends by splicing; to fiber optic current sensors; and to a method for protecting the spliced optical fiber against mechanical stress and/or humidity. A protection tube is arranged around the spliced optical fiber in a splice section of the spliced optical fiber. A first and second end of the protection tube is sealed to the spliced optical fiber by first and second sealing arrangement for protecting the splice.