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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 16 — Aug. 11, 2014
  • pp: 19108–19116

Magnetic field sensing based on magnetic-fluid-clad fiber-optic structure with taper-like and lateral-offset fusion splicing

Shaohua Dong, Shengli Pu, and Haotian Wang  »View Author Affiliations

Optics Express, Vol. 22, Issue 16, pp. 19108-19116 (2014)

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A kind of magnetic field sensor composed of magnetic fluid surrounding a segment of singlemode fiber is proposed. The taper-like and lateral-offset fusion splicing techniques are employed. The sensing principle is based on cladding mode interference. The interference valley wavelength or transmission loss of the sensing structure is sensitive to the external magnetic field, which is utilized for magnetic field sensing. The linear response regions are obtained in the range of 38-225 Oe and 250-475 Oe. For the valley-wavelength-shift-type sensing, the sensitivities are 14.1 pm/Oe and 26 pm/Oe at low and high field ranges, respectively. For the transmission-loss-variation-type sensing, the sensitivity of −0.024 dB/Oe is achieved for the magnetic field strength ranging from 250 to 475 Oe.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(160.3820) Materials : Magneto-optical materials
(230.1150) Optical devices : All-optical devices
(230.3810) Optical devices : Magneto-optic systems

ToC Category:

Original Manuscript: May 29, 2014
Revised Manuscript: July 12, 2014
Manuscript Accepted: July 21, 2014
Published: July 30, 2014

Shaohua Dong, Shengli Pu, and Haotian Wang, "Magnetic field sensing based on magnetic-fluid-clad fiber-optic structure with taper-like and lateral-offset fusion splicing," Opt. Express 22, 19108-19116 (2014)

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