基于锥形细芯光纤和磁流体的全光纤磁场传感器。

All-fiber magnetic field sensor based on tapered thin-core fiber and magnetic fluid.

作者信息

Zhang Junying, Qiao Xueguang, Yang Hangzhou, Wang Ruohui, Rong Qiangzhou, Lim Kok-Sing, Ahmad Harith

出版信息

Appl Opt. 2017 Jan 10;56(2):200-204. doi: 10.1364/AO.56.000200.

DOI:10.1364/AO.56.000200

Abstract

A method for the measurement of a magnetic field by combining a tapered thin-core fiber (TTCF) and magnetic fluid is proposed and experimentally demonstrated. The modal interference effect is caused by the core mode and excited eigenmodes in the TTCF cladding. The transmission spectra of the proposed sensor are measured and theoretically analyzed at different magnetic field strengths. The results field show that the magnetic sensitivity reaches up to -0.1039 dB/Oe in the range of 40-1600 e. The proposed method possesses high sensitivity and low cost compared with other expensive methods.

摘要

提出了一种结合锥形细芯光纤（TTCF）和磁流体来测量磁场的方法，并进行了实验验证。模态干涉效应由TTCF包层中的芯模和激发的本征模引起。在所提出的传感器在不同磁场强度下测量并进行了理论分析其透射光谱。结果表明，在40 - 1600 e的范围内，磁灵敏度高达-0.1039 dB/Oe。与其他昂贵的方法相比，该方法具有高灵敏度和低成本的特点。