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Related Experiment Video

Updated: Jun 19, 2026

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

Fiber-optic Bragg grating strain sensor with drift-compensated high-resolution interferometric wavelength-shift

A D Kersey, T A Berkoff, W W Morey

    Optics Letters
    |October 3, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...

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    Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry - Perot wavelength filter.

    Optics letters·2009

    A novel fiber Bragg grating strain sensor system accurately measures minute strain changes. Its reference channel compensates for thermal drift, achieving high resolution for precise quasi-static strain detection.

    Area of Science:

    • Optoelectronics and Photonics
    • Materials Science and Engineering
    • Mechanical Engineering

    Background:

    • Fiber Bragg gratings (FBGs) are widely used for sensing applications due to their unique spectral properties.
    • Strain-induced wavelength shifts in FBGs are a primary method for strain measurement.
    • Thermal variations can introduce significant drift, compromising the accuracy of FBG-based strain sensors.

    Purpose of the Study:

    • To describe a fiber Bragg grating strain sensor system utilizing interferometric wavelength shift determination.
    • To incorporate a reference channel for compensating thermal-induced drift.
    • To evaluate the system's capability in resolving sub-microstrain changes in quasi-static strain.

    Main Methods:

    • Employing interferometric techniques to precisely measure strain-induced wavelength shifts in FBGs.

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    Last Updated: Jun 19, 2026

    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

    Production of a Strain-Measuring Device with an Improved 3D Printer
    06:17

    Production of a Strain-Measuring Device with an Improved 3D Printer

    Published on: January 30, 2020

  • Integrating a reference channel within the system to actively compensate for temperature fluctuations.
  • Applying quasi-static strain to the FBG sensor and analyzing the output signal.

    • Main Results:

    • The developed system demonstrates the capability to resolve sub-microstrain changes.
    • A resolution of approximately 6 x 10(-3) microstrain/radical Hz was achieved at a 1 Hz perturbation frequency.
    • The reference channel effectively mitigated the impact of thermal drift on sensor output.

    Conclusions:

    • The described fiber Bragg grating strain sensor system offers high sensitivity and accuracy for quasi-static strain measurements.
    • The integration of a reference channel significantly enhances the system's robustness against thermal drift.
    • This technology holds promise for advanced structural health monitoring and precision metrology applications.