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Related Experiment Video

Updated: May 20, 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

A wide dynamics and fast scan interrogating method for a fiber Bragg grating sensor network implemented using code

Youngbok Kim1, Sie-Wook Jeon, Won-Bae Kwon

  • 1Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, Korea. youngbokk@gmail.com

Sensors (Basel, Switzerland)
|July 11, 2012
PubMed
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We developed a fiber Bragg grating (FBG) sensor network using code division multiple access (CDMA) for individual sensor identification. This system achieves a wide strain range and low crosstalk, enhancing sensor network capabilities.

Area of Science:

  • Optoelectronics
  • Fiber optic sensing
  • Signal processing

Background:

  • Fiber Bragg grating (FBG) sensors are crucial for various monitoring applications.
  • Existing sensor networks face challenges in multiplexing and crosstalk.
  • Code division multiple access (CDMA) offers a potential solution for enhanced sensor network performance.

Purpose of the Study:

  • To propose and demonstrate a novel FBG sensor network architecture.
  • To implement CDMA techniques for individual sensor interrogation.
  • To overcome limitations of time-delay-based sensing methods.

Main Methods:

  • Employing a fiber Bragg grating (FBG) sensor network.
  • Utilizing code division multiple access (CDMA) for sensor identification.
Keywords:
code division multiple accessfiber Bragg grating sensoroptical sensor networksliding correlationwavelength-to-time conversion

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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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  • Applying a sliding correlation method with frequency-shifted signals.
  • Incorporating wavelength-to-time conversion using a dispersive medium.

    • Main Results:

    • Successful identification of information from individual sensors.
    • Demonstration of a wide strain dynamic range of 2,400 με.
    • Achieved a low crosstalk level of 950:1, indicating high signal fidelity.

    Conclusions:

    • The proposed FBG sensor network effectively utilizes CDMA for robust sensor interrogation.
    • The implemented techniques enable accurate data retrieval independent of time delays.
    • This approach significantly improves the performance of fiber optic sensing networks.