Abstract

This Letter demonstrates the effect and elimination of alignment error in an optical fiber current sensor. An optical model is built to illustrate the effect of alignment error, which does not induce zero drift and has a large effect on output accuracy. The total alignment error and modulation angle of the polarization controller are defined as $k$ and $\theta$, respectively. Parameter $t$ is equal to $2\theta -2k$. An elimination method of the error $k$ is proposed, which corrects the angle $\theta$ to keep parameter $t$ at 90 deg. This method avoids the measurement of all splice angles separately. Its feasibility is shown by simulation results. In addition, the measurement method and conditions of parameter $t$ are presented. The final $t$ is about 90.24 deg. Furthermore, the effectiveness of the proposed elimination method is proven by a performance test.

© 2014 Optical Society of America

Analysis and elimination of bias error in a fiber-optic current sensor

Xiaxiao Wang, Zijie Zhao, Chuansheng Li, Jia Yu, and Zhenjie Wang
Appl. Opt. 56(32) 8887-8895 (2017)

Stray current sensor with cylindrical twisted fiber

Shaoyi Xu, Wei Li, Yuqiao Wang, and Fangfang Xing
Appl. Opt. 53(24) 5486-5492 (2014)

Simulation of vibration-induced effect on plasma current measurement using a fiber optic current sensor

Frédéric Descamps, Matthieu Aerssens, Andrei Gusarov, Patrice Mégret, Vincent Massaut, and Marc Wuilpart
Opt. Express 22(12) 14666-14680 (2014)

Polarimetric current sensor based on polarization division multiplexing detection

Shaoyi Xu, Wei Li, Fangfang Xing, and Yuqiao Wang
Opt. Express 22(10) 11985-11994 (2014)

Optical fiber microwire current sensor

M. Belal, Z. Song, Y. Jung, G. Brambilla, and T. P. Newson
Opt. Lett. 35(18) 3045-3047 (2010)