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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Published on: September 30, 2019

Unidirectional fiber optic sensor for angular acceleration measurement.

Gunther Schlöffel1, Friedrich Seiler

  • 1French-German Research Institute of Saint-Louis (ISL), Saint-Louis 68301, France. gunther.schloeffel@isl.eu

Optics Letters
|May 2, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a novel fiber optic sensor for angular acceleration measurement. Unlike traditional fiber optic gyroscopes, this design uses a two-beam interferometer to detect changes proportional to acceleration.

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Area of Science:

  • Optoelectronics
  • Sensor Technology
  • Inertial Navigation

Background:

  • Fiber optic gyroscopes (FOGs) commonly utilize the Sagnac effect for rotation sensing.
  • Existing FOGs typically employ unidirectional light propagation in a fiber coil.
  • Measuring angular acceleration presents unique challenges in sensor design.

Purpose of the Study:

  • To describe a novel fiber optic sensor concept for angular acceleration measurement.
  • To differentiate the proposed sensor's principle from conventional Sagnac-effect-based FOGs.
  • To explore the factors influencing the sensitivity of this new sensor design.

Main Methods:

  • Conceptualization of a fiber optic sensor system.
  • Integration of a light source, fiber coil, and a two-beam interferometer.
  • Utilizing the Sagnac effect to detect changes in optical path length.

Main Results:

  • A sensor design is proposed that measures angular acceleration.
  • The Sagnac effect's influence on optical path length is shown to be proportional to angular acceleration.
  • The proposed sensor's sensitivity is influenced by fiber coil area and interferometer characteristics.

Conclusions:

  • The described fiber optic sensor offers a new approach to angular acceleration measurement.
  • This method deviates from standard unidirectional FOGs by employing a two-beam interferometer.
  • Sensitivity is a function of both the sensor's physical configuration and the interferometer's performance.