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Related Concept Videos

Gyroscope01:02

Gyroscope

A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
Effects of feedback01:24

Effects of feedback

Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
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...
Galvanometer01:24

Galvanometer

Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform magnetic...

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Related Experiment Video

Updated: Jun 6, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

New interferometric fiber-optic gyroscope with amplified optical feedback.

C X Shi, T Yuhara, H Iizuka

    Applied Optics
    |November 12, 2010
    PubMed
    Summary

    A novel fiber-optic gyroscope uses amplified optical feedback for enhanced performance. This design offers advantages over conventional interferometric fiber-optic gyroscopes, improving rotation measurement resolution.

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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

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    Last Updated: Jun 6, 2026

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
    09:03

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

    Published on: January 7, 2019

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

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

    Published on: September 30, 2019

    Area of Science:

    • Photonics and Optical Engineering
    • Inertial Navigation Systems

    Background:

    • Interferometric fiber-optic gyroscopes (I-FOGs) are crucial for navigation.
    • Conventional I-FOGs face limitations in sensitivity and resolution.
    • Resonant fiber-optic gyros (R-FOGs) offer improved performance but use different principles.

    Purpose of the Study:

    • To propose and theoretically investigate a novel fiber-optic gyroscope design.
    • To enhance the performance of fiber-optic gyroscopes using amplified optical feedback.
    • To analyze the characteristics and advantages of the proposed feedback EDFA-FOG (FE-FOG).

    Main Methods:

    • Theoretical investigation of a novel interferometric fiber-optic gyroscope.
    • Incorporation of an Er-doped fiber amplifier (EDFA) for amplified optical feedback.
    • Utilizing a low-coherence light source and matching modulation frequency to create pulsed output signals.
    • Analysis of pulse sharpness adjustment via EDFA gain and phase modulator depth.

    Main Results:

    • The proposed FE-FOG functions similarly to an R-FOG due to Sagnac loop utilization but with a low-coherence source.
    • Pulsed output signals are generated, with sharpness adjustable by EDFA gain and modulation depth.
    • Rotation induces a shift in the output pulse's peak position, enabling measurement.
    • The resolution of rotation measurement is directly dependent on the output pulse sharpness.

    Conclusions:

    • The feedback EDFA-FOG (FE-FOG) presents a novel approach to fiber-optic gyroscope technology.
    • The FE-FOG demonstrates significant advantages over conventional interferometric fiber-optic gyroscopes (I-FOGs).
    • Both open-loop and closed-loop operation methods are feasible and detailed, highlighting the system's versatility.