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Updated: May 17, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Optofluidic magnetometer developed in a microstructured optical fiber.

A Candiani1, M Konstantaki, W Margulis

  • 1Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, Heraklion, Greece.

Optics Letters
|November 2, 2012
PubMed
Summary
This summary is machine-generated.

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We developed a novel in-fiber magnetometer using microstructured optical fiber and ferrofluid. This device accurately measures magnetic fields, enabling directional flux measurements.

Area of Science:

  • Optofluidics
  • Magnetometry
  • Optical Fiber Sensing

Background:

  • Microstructured optical fibers (MOFs) offer unique light-matter interaction properties.
  • Ferrofluids exhibit tunable optical properties in response to magnetic fields.
  • Developing compact and sensitive magnetic field sensors is crucial for various applications.

Purpose of the Study:

  • To present a directional, in-fiber optofluidic magnetometer.
  • To demonstrate the principle of magnetic field sensing using a MOF Bragg grating infiltrated with ferrofluid.
  • To characterize the performance of the magnetometer in terms of sensitivity and range.

Main Methods:

  • Fabrication of a MOF Bragg grating infiltrated with a ferrofluidic defect.
  • Application of external magnetic fields to induce ferrofluid movement.

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  • Monitoring changes in the MOF Bragg grating's reflection spectrum.
  • Calibration of the sensor response against known magnetic field strengths.

    • Main Results:

    • The in-fiber magnetometer successfully detected magnetic fields.
    • The sensor demonstrated directional measurement capabilities.
    • The measurable magnetic field range was determined to be from 317 to 2500 Gauss (G).
    • The movement of the ferrofluid defect along the MOF Bragg grating directly correlated with the applied magnetic field.

    Conclusions:

    • The presented optofluidic magnetometer offers a novel approach for directional magnetic field sensing.
    • The device leverages the unique properties of MOFs and ferrofluids for sensitive measurements.
    • This technology holds potential for applications requiring in-situ and directional magnetic field monitoring.