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Related Experiment Video

Updated: Dec 25, 2025

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

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High-temperature all-fiber non-destructive multi-parameter sensing system with consistent performance.

Jiaji He, Chennan Hu, Di Hu

    Optics Letters
    |April 3, 2020
    PubMed
    Summary
    This summary is machine-generated.

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    This study presents a novel all-fiber sensing system for non-destructive testing. The system accurately monitors high temperatures up to 600°C and detects cracks in metal pipes using acoustic waves.

    Area of Science:

    • Materials Science
    • Optical Engineering
    • Non-destructive Testing

    Background:

    • High-temperature environments pose challenges for conventional sensing systems.
    • Accurate monitoring of temperature and structural integrity (e.g., cracks) is crucial in industrial applications.
    • Existing non-destructive evaluation methods may be limited in high-temperature performance and multi-parameter capabilities.

    Purpose of the Study:

    • To develop a robust, all-fiber, non-destructive sensing system for simultaneous high-temperature monitoring and crack detection.
    • To ensure consistent system performance across a wide range of temperature fluctuations.
    • To validate the system's efficacy on industrial-grade materials.

    Main Methods:

    • Utilized a gold-coated multi-mode fiber for laser pulse delivery and acoustic excitation, minimizing high-temperature parasitic signals.

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  • Employed an in-fiber Fabry-Perot fiber Bragg grating (FP-FBG) in a single-mode fiber for acoustic detection, ensuring stable operation by preventing strain redistribution.
  • Integrated specialized active signal generation and detection units for reliable performance.
  • Demonstrated the system on an industry-standard P91 pipe.

    • Main Results:

    • The developed system successfully monitored temperatures up to 600°C.
    • The system effectively detected cracks in metal pipes using acoustic wave analysis.
    • Consistent system operation was maintained across varying high-temperature conditions.
    • The FP-FBG sensor demonstrated reliable acoustic detection without strain redistribution issues.

    Conclusions:

    • The all-fiber, non-destructive sensing system offers a viable solution for high-temperature environments.
    • The system provides a dual capability for temperature monitoring and crack detection in metallic structures.
    • The demonstrated feasibility on P91 pipes indicates strong potential for industrial applications.