基于光子晶体光纤和磁流体的马赫-曾德尔干涉磁场传感器。

Mach-Zehnder interferometric magnetic field sensor based on a photonic crystal fiber and magnetic fluid.

作者信息

Ding Xiang Zi, Yang Hang-Zhou, Qiao Xue-Guang, Zhang Pan, Tian Oin, Rong Qiang Zhou, Nazal Nurul Asha Mohd, Lim Kok-Sing, Ahmad Harith

出版信息

Appl Opt. 2018 Mar 20;57(9):2050-2056. doi: 10.1364/AO.57.002050.

DOI:10.1364/AO.57.002050

PMID:29603992

Abstract

A Mach-Zehnder interferometric magnetic field sensor based on a photonic crystal fiber (PCF) and magnetic fluid (MF) was designed and experimentally demonstrated. The sensing probe consists of a single-mode-(SM)-multimode-PCF-SM fiber structure through arc fusion splicing. It was then laser engrave notched with the femtosecond laser so that the PCF cladding was selectively infilled MF. A well-defined interference pattern was obtained on account of the tunable refractive index of the MF infilled PCF cladding. The transmission spectra of the proposed sensor under different magnetic field intensities have been measured and theoretically analyzed. The results show that the sensitivity of the proposed sensor can reach -0.13 dB/mT and 0.07334 nm/mT in the magnetic field intensity from 1 mT to 20 mT and 2 mT to 20 mT, respectively.

摘要

设计并通过实验验证了一种基于光子晶体光纤（PCF）和磁流体（MF）的马赫-曾德尔干涉磁场传感器。传感探头由单模-多模-光子晶体光纤-单模光纤结构通过电弧熔接而成。然后用飞秒激光对其进行激光刻槽，使光子晶体光纤包层选择性地填充磁流体。由于填充磁流体的光子晶体光纤包层的折射率可调，因此获得了清晰的干涉图样。测量并理论分析了所提出传感器在不同磁场强度下的透射光谱。结果表明，在所提出的传感器中，在磁场强度从1 mT到20 mT以及从2 mT到20 mT时，灵敏度分别可达-0.13 dB/mT和0.07334 nm/mT。