Distributed optical fiber magnetic field sensor based on polarization-sensitive OFDR

Author:

Tang Yi,Zhu MengshiORCID,Pang Fufei,Wei Heming,Zhang LiangORCID,Chen Wei,Wang Tingyun

Abstract

A distributed optical fiber magnetic field sensor based on a polarization-sensitive optical frequency domain reflectometer (POFDR) is proposed. It extracts the accumulated Faraday rotation by combining the Stokes vectors and the backward Mueller matrices from the measured states of polarization (SOPs) and obtains the magnetic field component. This method avoids adjusting the input polarization during the magnetic field sensing process. It overcomes the drawback of the conventional POFDR scheme, which requires at least two sets of different input SOPs for each sensing. Finally, the aforementioned effectiveness has been experimentally verified by using a single-mode sensing fiber. The results show that the sensor has good repeatability and linearity. The measurement error of the magnetic field sensor is 19.4 mT. The measured magnetic field variations agree with the applied ones with similarities higher than 0.98.

Funder

National Natural Science Foundation of China

Jiangsu Province's Industry Outlook and Key Core Technologies - Key Projects

Open Fund of Laboratory of Science and Technology on Marine Navigation and Control, China State Shipbuilding

Shanghai Committee of Science and Technology

Publisher

Optica Publishing Group

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