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Related Experiment Video

Updated: Jul 30, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Multi-Harmonic Modulation in a Fiber-Optic Gyroscope.

Martin Miranda1, Nobuyuki Takei1,2, Yuki Miyazawa1

  • 1Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.

Sensors (Basel, Switzerland)
|May 13, 2023
PubMed
Summary
This summary is machine-generated.

We introduce a novel modulation technique for fiber-optic gyroscopes, achieving the highest performance reported. This method enhances precision by using multiple sinusoidal harmonics for smoother, cleaner output signals.

Keywords:
fiber-optic gyroscopemultiple harmonicsrelative-intensity noisesinusoidal bias modulationthermal-phase noise

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Area of Science:

  • Optics
  • Instrumentation
  • Sensor Technology

Background:

  • Optimizing bias modulation is key to enhancing fiber-optic gyroscope (FOG) precision.
  • Current methods like sinusoidal and square-wave modulation have limitations.
  • A need exists for improved modulation techniques offering superior performance.

Purpose of the Study:

  • To propose and demonstrate a novel modulation technique for FOGs using multiple harmonics of sinusoidal modulation.
  • To evaluate the performance of this new method compared to existing techniques.
  • To achieve unprecedented levels of precision in FOGs.

Main Methods:

  • Utilized multiple harmonics of sinusoidal modulation as an intermediate alternative.
  • Employed a high modulation frequency to mitigate thermal phase noise.
  • Integrated advantages of sinusoidal and square-wave modulation for a clean output.

Main Results:

  • Achieved a smooth modulation with a clean, spike-free output signal.
  • Demonstrated a satisfactory signal-to-noise ratio.
  • Attained an angular random walk of 5.2(2)μdeg/h and bias instability of ~10μdeg/h.

Conclusions:

  • The proposed multiple harmonics modulation offers a superior alternative for FOGs.
  • This technique integrates the benefits of existing methods, providing enhanced performance.
  • The achieved results represent the highest performance reported for fiber-optic gyroscopes to date.