Magnetic Field and Temperature Dual-Parameter Sensor Based on Nonadiabatic Tapered Microfiber Cascaded With FBG

Abstract

A kind of double-parameter sensor based on magnetic-fluid-coated nonadiabatic tapered microfiber (NTF) cascaded with fiber Bragg grating (FBG) is proposed and experimentally demonstrated. Simultaneous measurement of magnetic field and temperature is realized by monitoring the variation of NTF interference spectrum and FBG characteristic dip. In the magnetic field range of 0-18 mT, the highest magnetic field sensitivity can reach 1.159 nm/mΤ. The maximum temperature sensitivity is up to -1.737 nm/℃. The proposed magnetic-fluid-coated NTF interferometer cascaded with FBG will find extensive application prospect due to its high sensitivity, easy fabrication, compactness, strong robustness, and low cost.

Multiparameter sensor based on micro/nano-structured optical fiber and composites

“…Moreover, as far as temperature sensing is concerned, the sensing unit used in this paper is not coated with a sensitive material, but the temperature detection sensitivity can be up to 28.37 pm/°C. Although the sensitivity of magnetic field sensing is lower compared to [26] , however, the sensing unit is simple, convenient, and durable in this paper.…”

Fiber-Optic Vector-Magnetic-Field Sensor Based on Gold-Clad Bent Multimode Fiber and Magnetic Fluid Materials

“…It has the magnetic properties of solid magnetic materials and unique optical properties. Due to its tunable refractive index (RI) characteristics, optical anisotropy and good compatibility with optical fiber, MF has been widely used in optical fiber sensors [ 1 , 2 , 3 , 4 , 5 ]. Recently, many fiber sensors combined with MF have been proposed for magnetic field, temperature and curvature measurement.…”

Optical Fiber Sensor with Stable Operating Point for AC Magnetic Field Measurement

“…Magnetic induction materials can be classified into three categories according to their working principles: magnetic fluid [8][9][10][11][12], magnetostrictive materials [2,3,[13][14][15][16][17][18][19][20], and magneto-rotational materials [21][22][23][24]. A magnetic fluid can flexibly be integrated into many types of fiber sensing structures, such as fiber Fabry-Perot interferometers [25,26], fiber Mach-Zehnder interferometers [27], fiber Bragg gratings (FBG) [12], and fiber tapering structures [28]. However, light absorption by a magnetic fluid always introduces large transmission losses.…”

“…Temperature crosstalk elimination can be achieved by different technologies, which the following are examples of. In 2022, Zhang et al proposed a composite magnetic fiber sensor based on an MF-coated nonadiabatic tapered microfiber cascaded with an FBG, and a sensitivity matrix was used to overcome the temperature crosstalk [28]. This kind of sensor requires the use of additional fiber gratings or other structures that can act as a temperature reference.…”