Title :
Phase drift compensation for electric current sensor employing a twisted fiber or a spun highly birefringent fiber
Author :
Dong, Xiaopeng ; Chu, Beatrice C B ; Kong, K.H. ; Chiang, Kin Seng
Author_Institution :
Dept. of Electron. Eng., Xiamen Univ., China
Abstract :
We propose a simple, passive signal-processing scheme to compensate for arbitrary phase shift in a Faraday-effect current sensor employing a twisted fiber or a spun highly birefringent fiber. The scheme is based on processing the AC and DC components of the received signals with four detectors in a complementary manner to derive a stable signal that depends only on the Faraday rotation. The effectiveness of the scheme has been demonstrated with an experimental sensor for both twisted and spun highly birefringent fibers.
Keywords :
Faraday effect; birefringence; coupled mode analysis; electric current measurement; fibre optic sensors; magneto-optical sensors; optical fibre polarisation; optical information processing; AC components; DC components; Faraday rotation; Faraday-effect current sensor; arbitrary phase shift; electric current sensor; phase drift compensation; received signals; sensor; simple passive signal-processing scheme; spun highly birefringent fiber; stable signal; twisted fiber; Birefringence; Conductors; Current; Faraday effect; Optical fiber polarization; Optical fiber sensors; Optical fibers; Optical films; Optical saturation; Optical sensors;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.892621
