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Magnetic field sensing based on magnetic-fluid-clad multimode-singlemode-multimode fiber structures.

Jiali Tang1, Shengli Pu2, Shaohua Dong3

  • 1College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China. tangjiali1230@gmail.com.

Sensors (Basel, Switzerland)
|October 16, 2014
PubMed
Summary
This summary is machine-generated.

This study introduces a novel magnetic field sensor using a magnetic-fluid-clad fiber structure. The sensor demonstrates high sensitivity for magnetic field detection, with potential applications in various sensing fields.

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Area of Science:

  • Photonics and optical sensing
  • Materials science
  • Electromagnetism

Background:

  • Fiber optic sensors offer advantages in harsh environments.
  • Magnetic field sensing is crucial for numerous industrial and scientific applications.
  • Developing sensitive and robust magnetic field sensors remains an active research area.

Purpose of the Study:

  • To propose and experimentally validate a novel magnetic field sensor.
  • To investigate the sensing performance of a magnetic-fluid-clad multimode-singlemode-multimode fiber structure.
  • To characterize the sensor's sensitivity to magnetic fields and temperature.

Main Methods:

  • Fabrication of the fiber structure using fusion splicing techniques.
  • Utilizing the interference between core and cladding modes for sensing.
  • Experimental measurement of spectral shifts and intensity changes in response to magnetic fields.
  • Analysis of temperature cross-sensitivity.

Main Results:

  • Two distinct interference dips were observed in the spectral response.
  • High magnetic field sensitivities of 215 pm/mT (wavelength shift) and 0.5742 dB/mT (intensity change) were achieved at 1595 nm.
  • Lower sensitivities of 60.5 pm/mT and 0.4821 dB/mT were recorded at 1565 nm.
  • A temperature sensitivity of 9.93 pm/°C was measured for the dip around 1595 nm.

Conclusions:

  • The magnetic-fluid-clad fiber structure is a viable platform for magnetic field sensing.
  • The sensor exhibits significant sensitivity to magnetic fields, with potential for further optimization.
  • The study provides valuable data on the performance characteristics of this novel fiber optic sensor.