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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

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Published on: September 30, 2019

An interferometric current sensor based on optical fiber micro wires.

Mohammad Belal1, Zhang-qi Song, Yongming Jung

  • 1Optoelectronics Research Centre, University of Southampton, Southampton, UK.

Optics Express
|October 14, 2010
PubMed
Summary
This summary is machine-generated.

This study presents a compact optic fiber micro wire current sensor. It measures electric current by detecting thermally induced optical phase shifts, achieving high sensitivity for alternating current signals.

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Area of Science:

  • Optoelectronics
  • Fiber Optics Sensors
  • Electrical Engineering

Background:

  • Traditional current sensors can be bulky and susceptible to electromagnetic interference.
  • Optical sensing offers a potential alternative for precise current measurement.

Purpose of the Study:

  • To develop a compact and sensitive current sensor utilizing optic fiber micro wires.
  • To demonstrate the principle of interferometrically measuring thermally induced optical phase shifts caused by electric current.

Main Methods:

  • Fabrication of a compact sensor using optic fiber micro wire.
  • Interferometric measurement of optical phase shifts.
  • Analysis of thermal effects induced by electric current flow.

Main Results:

  • Demonstrated a compact optic fiber micro wire current sensor.
  • Achieved a responsivity of 1.28 x 10(-4) rad/I(2) at 50 Hz.
  • Showcased capability for measuring alternating current signals up to 500 Hz.

Conclusions:

  • The optic fiber micro wire sensor is effective for current sensing applications.
  • The demonstrated technology offers a compact and sensitive solution for measuring alternating current.