Mach-Zehnder Interferometer Cascaded With FBG for Simultaneous Measurement of Magnetic Field and Temperature

A kind of composite structure consisting of Mach–Zehnder interferometer (MZI) cascaded with fiber Bragg grating (FBG) is proposed for simultaneous measurement of magnetic field and temperature. The MZI structure consists of a pair of up-tapered joints, which are used to excite high order modes and re-couple them to the fiber core. The structure is immersed in magnetic fluid to make it magnetically sensitive. The cascaded FBG is employed for temperature compensation. Simultaneous measurement of magnetic field and temperature can be achieved by monitoring the transmission spectra of MZI and FBG. The magnetic field sensitivity of the proposed sensing structure can be up to 407.82 pm/mT in the range of 0–25 mT. The advantages of the proposed sensing structure lie in low cost, simple structure, easy manufacture, and strong robustness, which make it attractive in the field of magnetic field sensing.

[1]  Dan Wang,et al.  Fiber Optic Fabry-Perot Magnetic Field Sensor With Temperature Compensation Using a Fiber Bragg Grating , 2014, IEEE Transactions on Instrumentation and Measurement.

[2]  Qiangzhou Rong,et al.  Highly sensitive magnetic field sensor using tapered Mach–Zehnder interferometer , 2018, Optics and Lasers in Engineering.

[3]  Tonglei Cheng,et al.  Magnetic Field Sensing Based on SPR Optical Fiber Sensor Interacting With Magnetic Fluid , 2019, IEEE Transactions on Instrumentation and Measurement.

[4]  Baojin J. Peng,et al.  Optical fiber F–P magnetic field sensor based on magnetostrictive effect of magnetic fluid , 2018, Optical Fiber Technology.

[5]  Peng Zu,et al.  Magneto-optic fiber Sagnac modulator based on magnetic fluids. , 2011, Optics letters.

[6]  Tingyun Wang,et al.  A Highly Sensitive Intensity-Modulated Optical Fiber Magnetic Field Sensor Based on the Magnetic Fluid and Multimode Interference , 2017, J. Sensors.

[7]  Li Ding,et al.  Thinned fiber Bragg grating magnetic field sensor with magnetic fluid , 2011, Defense + Commercial Sensing.

[8]  Yong Zhao,et al.  Measurement of Magnetic Field and Temperature Based on Fiber-Optic Composite Interferometer , 2017, IEEE Transactions on Instrumentation and Measurement.

[9]  Shieh-Yueh Yang,et al.  Magnetically-modulated refractive index of magnetic fluid films , 2002 .

[10]  Delong Su,et al.  Ultrasensitive Magnetic Field Sensing Based on Refractive-Index-Matched Coupling , 2017, Sensors.

[11]  Yong Zhao,et al.  Magnetic field sensor based on the magnetic-fluid-clad combined with singlemode–multimode–singlemode fiber and large core-offset splicing structure , 2018 .

[12]  Shengli Pu,et al.  Magnetic field sensing based on magnetic-fluid-clad fiber-optic structure with taper-like and lateral-offset fusion splicing. , 2014, Optics express.

[13]  Kok-Sing Lim,et al.  Mach-Zehnder interferometric magnetic field sensor based on a photonic crystal fiber and magnetic fluid. , 2018, Applied optics.

[14]  W. Marsden.  I and J , 2012 .

[15]  Shengli Pu,et al.  Magnetic Field Sensing Based on Magnetic-Fluid-Clad Fiber-Optic Structure With Up-Tapered Joints , 2014, IEEE Photonics Journal.

[16]  Xianfeng Chen,et al.  Fiber-optic evanescent field modulator using a magnetic fluid as the cladding , 2006 .

[17]  Ya-Nan Zhang,et al.  In-Line Mach–Zehnder Interferometer and FBG With Smart Hydrogel for Simultaneous pH and Temperature Detection , 2018, IEEE Sensors Journal.

[18]  Yong Zhao,et al.  Multi-modes interferometer for magnetic field and temperature measurement using Photonic crystal fiber filled with magnetic fluid , 2018 .

[19]  Peng Zu,et al.  Enhancement of the sensitivity of magneto-optical fiber sensor by magnifying the birefringence of magnetic fluid film with Loyt-Sagnac interferometer , 2014 .

[20]  Qi Wang,et al.  A Magnetic Field Sensor Based on a Magnetic Fluid-Filled FP-FBG Structure , 2016, Sensors.

[21]  Ning Wang,et al.  Magnetic field sensing based on singlemode-multimode-singlemode fiber structures using magnetic fluids as cladding. , 2013, Optics letters.

[22]  Peng Zu,et al.  Temperature-Insensitive Magnetic Field Sensor Based on Nanoparticle Magnetic Fluid and Photonic Crystal Fiber , 2012, IEEE Photonics Journal.

[23]  Qiang Wu,et al.  Plasmonic fiber-optic vector magnetometer , 2016 .

[24]  K. Hill,et al.  Fiber Bragg grating technology fundamentals and overview , 1997 .

[25]  Shaohua Dong,et al.  Magnetic Field Sensing Based on Magnetic-Fluid-Clad Multimode-Singlemode-Multimode Fiber Structures , 2014, Sensors.