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Updated: Jun 6, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Reflectometric frequency-modulation continuous-wave distributed fiber-optic stress sensor with forward coupled beams.

G Zheng, M Campbell, P Wallace

    Applied Optics
    |December 4, 2010
    PubMed
    Summary

    This study introduces a novel distributed optical-fiber stress sensor using frequency-modulation continuous-wave technology. It accurately detects stress intensity and location along 100m of fiber with 0.85m resolution.

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    Area of Science:

    • Photonics and Sensing Technologies
    • Fiber Optic Sensors
    • Applied Physics

    Background:

    • Distributed sensing systems are crucial for structural health monitoring.
    • Optical fiber sensors offer advantages in remote and harsh environment applications.
    • Existing methods for stress detection in optical fibers have limitations in spatial resolution and simultaneous intensity/location determination.

    Purpose of the Study:

    • To report a novel distributed optical-fiber stress sensor.
    • To demonstrate simultaneous detection of stress intensity and location.
    • To evaluate the sensor's spatial resolution and sensing range.

    Main Methods:

    • Utilized the frequency-modulation continuous-wave (FMCW) technique.
    • Employed a sensor configuration with birefringent fiber, a mirror, a diode laser, and a photodiode detector.

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    Last Updated: Jun 6, 2026

    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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    Published on: November 7, 2016

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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  • Analyzed the beat signal generated by two forward-coupled mode beams to determine stress parameters.

    • Main Results:

    • Achieved simultaneous determination of stress intensity and location.
    • Demonstrated a spatial resolution of 0.85 m (rms error).
    • Successfully operated the sensor over a sensing range of 100 m.

    Conclusions:

    • The developed FMCW-based optical-fiber sensor is effective for distributed stress detection.
    • The system offers a practical solution for monitoring stress in various applications.
    • Further discussion on the sensor's advantages and limitations is provided.