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Updated: Jun 20, 2026
08:23
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Summary
This study presents a novel fiber-optic magnetic-field sensor. The device utilizes the magnetostrictive effect in nickel to detect minute magnetic fields with high sensitivity.
Area of Science:
- Optoelectronics
- Magnetics
- Materials Science
Background:
- Magnetic field sensing is crucial for various scientific and industrial applications.
- Existing sensors often face limitations in sensitivity or size.
Purpose of the Study:
- To develop a highly sensitive fiber-optic sensor for magnetic field detection.
- To leverage the magnetostrictive effect for enhanced sensing capabilities.
Main Methods:
- A single-mode fiber was bonded to a nickel cylinder.
- The sensor's response to magnetic fields was analyzed by observing changes in light polarization.
Main Results:
- The fiber-optic magnetic-field sensor demonstrated a sensitivity of 1.76 x 10(-2) rad/m Oe.
- The sensor successfully detected magnetic fields as small as 4.4 x 10(-6) Oe/m of fiber.
Conclusions:
- The developed fiber-optic sensor offers a promising approach for sensitive magnetic field measurements.
- This technology has potential applications in areas requiring precise magnetic field detection.
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