公开(公告)号：US10481182B2

公开(公告)日：2019-11-19

申请号：US15434747

申请日：2017-02-16

Applicant: ABB Schweiz AG

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

IPC: G01R15/24

Abstract: There is described an optical fiber current sensor having an opto-electronic module part for detecting an optical phase shift induced by the measurand field in a sensing fiber, a sensor head including the sensing fiber, wherein the sensing fiber is a spun highly-birefringent fiber having a length L=∫ ds defined by the line integral along the space curve given by the sensing fiber coil such that the length L of the sensing fiber is sufficiently long to suppress thermal signal instabilities due to the spun character of the sensing fiber while the effective number of fiber windings is low enough to maintain a maximum sensitivity over the full measurement range of the fiber-optical sensor.

公开(公告)号：US20170160315A1

公开(公告)日：2017-06-08

申请号：US15434747

申请日：2017-02-16

Applicant: ABB Schweiz AG

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

IPC: G01R15/24

CPC classification number: G01R15/245 ,  G01R15/246

Abstract: There is described an optical fiber cuing sensor having an opto-electronic module pan (10-2) for detecting an optical phase shift induced by the measurand field in a sensing fiber (12), a sensor head (10-1) including the sensing fiber (12), wherein the sensing fiber (12) is a spun highly-birefringent fiber having a length L=∫ds defined by the line integral along the space curve given by the sensing fiber coil such that the length L of the sensing fiber (12) is sufficiently long to suppress thermal signal instabilities due to the spun character of the sensing fiber (12) while the effective number of fiber windings is low enough to maintain a maximum sensitivity over the full measurement range of the fiber-optical sensor (10).