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Related Experiment Video

Updated: Jul 1, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

12.0K

Photon counting fibre optic distributed temperature sensing with a CMOS SPAD array.

Caitlin S Tye, Katjana Ehrlich, Andrew D M Green

    Optics Express
    |March 5, 2024
    PubMed
    Summary
    This summary is machine-generated.

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    This study enhances fibre optic Raman distributed temperature sensing (DTS) by using a new sensor array. Faster, more accurate temperature measurements are now possible for practical applications.

    Area of Science:

    • Optics and Photonics
    • Sensing Technology
    • Materials Science

    Background:

    • Distributed temperature sensing (DTS) using fibre optics is crucial for monitoring.
    • Traditional Raman DTS methods suffer from long measurement times due to weak signals and detector limitations.
    • Existing systems often require individual detectors, limiting scalability and speed.

    Purpose of the Study:

    • To improve the speed and accuracy of time-resolved fibre optic Raman DTS.
    • To demonstrate the effectiveness of a multiplexed single-photon counting approach using a CMOS SPAD line sensor array.
    • To enable practical, real-time temperature monitoring over optical fibres.

    Main Methods:

    • Utilized a 512-pixel complementary-metal-oxide semiconductor (CMOS) single-photon avalanche diode (SPAD) line sensor array with integrated timing electronics.

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  • Implemented multiplexed single photon counting to enhance the detector count rate.
  • Performed time-resolved Raman spectroscopy measurements on an optical fibre.

    • Main Results:

    • Achieved temperature measurements every 0.5 meters with 0.7°C accuracy.
    • Reduced measurement time to 10 seconds for a 13.0-meter optical fibre.
    • Demonstrated increased count rates through multiplexed single photon counting, significantly decreasing overall measurement duration.

    Conclusions:

    • The developed CMOS SPAD line sensor array significantly reduces measurement times for Raman DTS.
    • Multiplexed single photon counting offers a practical solution for faster and more accurate fibre optic temperature sensing.
    • This advancement paves the way for more efficient real-time monitoring in various industrial and scientific applications.