Fiber-optic in-line magnetic field sensor based on the magnetic fluid and multimode interference effects
Fiber-optic in-line magnetic field sensor based on the magnetic fluid and multimode interference effects
复制标题
基于磁流体和多模干涉效应的光纤在线磁场传感器
DOI：
10.1063/1.4824470
复制
发表时间：
2013-10-07
影响因子：
4
通讯作者：
Song, Binbin
中科院分区：
文献类型：
--
作者：
Lin, Wei;Miao, Yinping;Song, Binbin
提出了一种基于多模干涉效应的紧凑型磁场传感器。它是将多模干涉仪（MMI）浸没在由一段方形无芯光纤（NCF）拼接在两个单模光纤之间形成的磁流体（MF）中。分析了该MMI的透射光谱特性，并通过将NCF浸入MF环境中研究了该传感器的光谱磁响应。干扰最大值的传输响应在相对线性范围内的灵敏度为−0.01939 dB/Oe。该传感器具有体积小、成本低的特点，在磁场测量中具有潜在的应用前景。
A compact magnetic field sensor has been proposed based on multimode interference effects. It consists of typical multimode interferometer (MMI) immersed into the magnetic fluid (MF) which is formed by a section of square no-core fiber (NCF) spliced between two single-mode fibers. The transmission spectral characteristics of this MMI have been analyzed, and the spectral magnetic response of the proposed sensor has been investigated by immersing the NCF into the MF environment. The transmission response of the interference maxima exhibits a sensitivity of −0.01939 dB/Oe in the relatively linear range. Due to its low cost and compactness, this sensor would find potential applications in the measurement of magnetic field.