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Related Experiment Video

Updated: Apr 22, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Fiber Bragg grating sensor interrogator based on 2D imaging system.

Zhongwei Tan, Wenhua Ren, Zhibo Liu

    Applied Optics
    |October 17, 2014
    PubMed
    Summary
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    This study introduces a new fiber Bragg grating sensor interrogator using a 2D imaging system. This advanced system offers improved wavelength accuracy and resolution without moving parts, enhancing stability and reliability for sensor applications.

    Area of Science:

    • Photonics and Optical Sensing
    • Instrumentation and Measurement

    Background:

    • Fiber Bragg Grating (FBG) sensors are widely used for various sensing applications.
    • Traditional interrogation methods often involve moving parts, limiting stability and accuracy.
    • There is a need for high-resolution, stable, and reliable FBG interrogators.

    Purpose of the Study:

    • To propose and demonstrate a novel fiber Bragg grating sensor interrogator.
    • To utilize a 2D imaging system with a virtually imaged phased array (VIPA) and infrared camera.
    • To achieve enhanced wavelength accuracy and resolution compared to existing methods.

    Main Methods:

    • Development of a 2D imaging system for FBG interrogation.
    • Integration of a virtually imaged phased array (VIPA) for high spectral resolution and angular dispersion.

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  • Employment of an infrared camera for data acquisition.
  • Analysis of the optimal setup for maximizing wavelength resolution.

    • Main Results:

    • Demonstration of a fiber Bragg grating sensor interrogator with no moving parts.
    • Achieved high stability and reliability of the proposed interrogator.
    • Exhibited superior absolute wavelength accuracy compared to traditional diffraction grating and 1D imaging systems.
    • Obtained a wavelength resolution of approximately 7 pm over a spectral range exceeding 30 nm.

    Conclusions:

    • The proposed 2D imaging system-based interrogator offers significant advantages in accuracy and resolution.
    • The VIPA's properties are crucial for achieving high performance in FBG sensing.
    • The developed interrogator provides a stable, reliable, and high-performance solution for FBG sensing applications.