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Related Concept Videos

Gyroscope: Precession01:24

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

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Published on: March 20, 2017

Scale-factor-stabilized fiber-optic gyroscope by deep phase modulation.

P Y Chien, C L Pan

    Optics Letters
    |September 29, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A novel fiber-optic gyroscope utilizes deep phase modulation for scale-factor stabilization. This system employs dual servo loops and third-harmonic detection for enhanced Sagnac phase shift measurement.

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    Last Updated: Jun 20, 2026

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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    Published on: March 20, 2017

    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    Area of Science:

    • Photonics and Optical Engineering
    • Inertial Navigation Systems

    Background:

    • Fiber-optic gyroscopes (FOGs) are crucial for inertial navigation.
    • Scale-factor errors limit FOG accuracy.
    • Deep phase modulation offers potential for improved FOG performance.

    Purpose of the Study:

    • To demonstrate a scale-factor-stabilized fiber-optic gyroscope.
    • To improve the accuracy and stability of FOGs through advanced modulation techniques.

    Main Methods:

    • Implementation of a fiber-optic gyroscope system using deep phase modulation.
    • Utilizing two servo loops for stabilization: one for light intensity and one for phase-modulation index.
    • Employing third-harmonic frequency detection with a lock-in technique to measure Sagnac phase shift.

    Main Results:

    • Successful demonstration of a scale-factor-stabilized FOG.
    • Stabilization of light intensity and phase-modulation index achieved.
    • Accurate detection of Sagnac phase shift demonstrated.

    Conclusions:

    • Deep phase modulation is an effective technique for scale-factor stabilization in FOGs.
    • The dual servo loop system enhances operational stability.
    • The proposed method offers a viable approach for high-accuracy inertial sensing.