All fiber magnetic field sensor with ferrofluidfilled tapered microstructured optical fiber interferometer

Ming Deng, Can Huang, Danhui Liu, Wei Jin, Tao Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

59 Citations (Scopus)


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 costeffective. Therefore, it will be a promising candidate for military, aviation industry, and biomedical applications, especially, for the applications where the space is limited.
Original languageEnglish
Pages (from-to)20668-20674
Number of pages7
JournalOptics Express
Issue number16
Publication statusPublished - 10 Aug 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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