公开(公告)号：US10466278B2

公开(公告)日：2019-11-05

申请号：US15650361

申请日：2017-07-14

Applicant: ABB Schweiz AG

Inventor： Georg Müller ,  Klaus Bohnert ,  Andreas Frank ,  Yang Lin

IPC: G01R15/24 ,  G02B6/02 ,  G02B6/10

Abstract: It is proposed to use a spun birefringent fiber for a current sensor or magnetic field sensor. The fiber has a birefringence that increases with temperature. In this case, the temperature dependence of the fiber's sensitivity to magnetic fields counteracts the temperature dependence of the fiber's Verdet constant, which allows to design current and field sensors that have reduced temperature dependence.

公开(公告)号：US20190154738A1

公开(公告)日：2019-05-23

申请号：US16253755

申请日：2019-01-22

Applicant: ABB Schweiz AG

Inventor： Klaus Bohnert ,  Andreas Frank ,  Yang Lin ,  Xun Gu ,  Georg Müeller

IPC: G01R15/24 ,  G01R19/32

Abstract: The optical interferometric sensor device comprises an integrated beam splitter having a first facet and a second facet with optical ports arranged therein. On the beam splitter, the beam splitting junctions as well as the optoelectronics-side ports and the sensing-side port are arranged with a mutual displacement along the direction of the first facet. This displacement reduces undesired interference effects caused by stray light. Also, a quarter-wave retarder is provided in a recess of the beam splitter with layers of soft adhesive adjacent to it in order to reduce stress.

公开(公告)号：US20170315158A1

公开(公告)日：2017-11-02

申请号：US15650361

申请日：2017-07-14

Applicant: ABB Schweiz AG

Inventor： Georg Müller ,  Klaus Bohnert ,  Andreas Frank ,  Yang Lin

IPC: G01R15/24 ,  G02B6/02 ,  G02B6/10

CPC classification number: G01R15/246 ,  G02B6/02333 ,  G02B6/02347 ,  G02B6/105

Abstract: It is proposed to use a spun birefringent fiber for a current sensor or magnetic field sensor. The fiber has a birefringence that increases with temperature. In this case, the temperature dependence of the fiber's sensitivity to magnetic fields counteracts the temperature dependence of the fiber's Verdet constant, which allows to design current and field sensors that have reduced temperature dependence.