All fiber magnetic field sensor with Ferrofluid-filled tapered microstructured optical fiber interferometer.

An ultra-compact optical fiber magnetic field sensor based on a microstructured optical fiber (MOF) modal interference and ferrofluid (FF) has been proposed and experimentally demonstrated. The magnetic field sensor was fabricated by splicing a tapered germanium-doped index guided MOF with six big holes injected with FF to two conventional single-mode fibers. The transmission spectra of the proposed sensor under different magnetic field intensities have been measured and theoretically analyzed. Due to an efficient interaction between the magnetic nanoparticles in FF and the excited cladding mode, the magnetic field sensitivity reaches up to117.9pm/mT with a linear range from 0mT to 30mT. Moreover, the fabrication process of the proposed sensor is simple, easy and cost-effective. Therefore, it will be a promising candidate for military, aviation industry, and biomedical applications, especially, for the applications where the space is limited.

[1]  Richard J. Black,et al.  Tapered single-mode fibres and devices. II. Experimental and theoretical quantification , 1991 .

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

[3]  Hui Ding,et al.  All-fiber magnetic-field sensor based on microfiber knot resonator and magnetic fluid. , 2012, Optics letters.

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

[5]  Decai Li,et al.  Magnetic field sensor based on asymmetric optical fiber taper and magnetic fluid , 2014 .

[6]  Y. Jiang,et al.  Magnetic fluid-filled microhole in the collapsed region of a photonic crystal fiber for the measurement of a magnetic field. , 2013, Optics letters.

[7]  P. Mikulic,et al.  An Inline Core-Cladding Intermodal Interferometer Using a Photonic Crystal Fiber , 2009, Journal of Lightwave Technology.

[8]  Zhengyong Liu,et al.  Refractive index response characteristic of fiber Bragg grating in a few-mode suspended-core fiber , 2013 .

[9]  Hamid Latifi,et al.  Magnetic Field Sensor Based on Nonadiabatic Tapered Optical Fiber With Magnetic Fluid , 2014, IEEE Photonics Technology Letters.

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

[11]  Tiegen Liu,et al.  Optical fiber magnetic field sensor based on single-mode-multimode-single-mode structure and magnetic fluid. , 2013, Optics letters.

[12]  Xinwan Li,et al.  Tunable magneto-optical wavelength filter of long-period fiber grating with magnetic fluids , 2007 .

[13]  Jian Li,et al.  Field modulation of light transmission through ferrofluid film , 2007 .

[14]  T. Kruse,et al.  Agglomeration and chain formation in ferrofluids: Two-dimensional x-ray scattering , 2003 .

[15]  H. V. Thakur,et al.  Photonic crystal fiber injected with Fe3O4 nanofluid for magnetic field detection , 2011 .

[16]  Tengda Du,et al.  Nonlinear optical effects in ferrofluids induced by temperature and concentration cross coupling , 1998 .

[17]  Jen-Jie Chieh,et al.  Tunable optical switch using magnetic fluids , 2004 .

[18]  C. Hong,et al.  Designing optical-fiber modulators by using magnetic fluids. , 2005, Optics letters.

[19]  Stavros Pissadakis,et al.  A loss-based, magnetic field sensor implemented in a ferrofluid infiltrated microstructured polymer optical fiber , 2014 .