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Updated: Jun 19, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Published on: January 7, 2019

Fiber-optic distributed sensing by a two-loop Sagnac interferometer.

X Fang

    Optics Letters
    |October 30, 2009
    PubMed
    Summary
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    A novel two-loop Sagnac interferometer enables fiber-optic distributed sensing. This system accurately locates disturbances and quantifies their amplitude using phase signal analysis.

    Area of Science:

    • Optoelectronics
    • Fiber Optic Sensing
    • Interferometry

    Background:

    • Fiber-optic distributed sensing offers advantages in monitoring infrastructure.
    • Traditional methods may lack precision in disturbance localization and amplitude quantification.

    Purpose of the Study:

    • To propose and validate a two-loop Sagnac interferometer for enhanced fiber-optic distributed sensing.
    • To demonstrate the system's capability in determining disturbance location and amplitude.

    Main Methods:

    • Utilizing a two-loop Sagnac interferometer configuration.
    • Analyzing two output phase signals to pinpoint disturbance location.
    • Integrating phase signals to calculate disturbance amplitude.

    Main Results:

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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

    Published on: November 7, 2016

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    Last Updated: Jun 19, 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

    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
    09:48

    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

    Published on: November 7, 2016

    • Successfully demonstrated disturbance localization using the proposed interferometer.
    • Quantified disturbance amplitude through phase signal integration.
    • Validated the system with a prototype distributed impact sensing setup.

    Conclusions:

    • The two-loop Sagnac interferometer is effective for fiber-optic distributed sensing.
    • The system provides accurate location and amplitude information for disturbances.
    • This technology holds promise for advanced structural health monitoring.