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High-temperature sensor based on SCSCS optics fiber structure.

Yalan Niu, Haojie Zhong, Jingjing Li

    Optics Express
    |September 23, 2025
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    Summary
    This summary is machine-generated.

    A novel high-temperature optical fiber sensor using Mach-Zehnder interference was developed. This robust sensor accurately measures temperatures up to 1000°C, showing great stability for industrial applications.

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    Area of Science:

    • Optoelectronics
    • Fiber Optic Sensors
    • High-Temperature Sensing

    Background:

    • Mach-Zehnder interference sensors are crucial for precise measurements.
    • Existing sensors face limitations in extreme high-temperature environments.
    • Developing robust sensors for harsh conditions is essential for industries like aerospace.

    Purpose of the Study:

    • To propose and validate a novel optical fiber structure sensor for high-temperature applications.
    • To investigate the sensor's performance characteristics, including sensitivity, stability, and repeatability.
    • To assess the sensor's suitability for demanding industrial environments.

    Main Methods:

    • Fabrication of a unique Single-Mode Fiber/Coreless Fiber/Seven-Core Fiber/Coreless Fiber/Single-Mode Fiber (SCSCS) structure via fusion-splicing.
    • Experimental examination of the sensor's response to high temperatures (up to 1000 °C).
    • Analysis of temperature sensitivity, stability (standard deviation 0.167), and periodicity.

    Main Results:

    • The sensor demonstrated a temperature sensitivity of 0.026 nm/°C.
    • The length of the seven-core fiber showed minimal impact on the temperature sensitivity spectrum.
    • The sensor exhibited excellent repeatability, stability, and good periodicity up to 1000 °C.

    Conclusions:

    • The proposed SCSCS optical fiber sensor is a viable solution for high-temperature measurements.
    • The sensor's robust performance makes it suitable for demanding applications in aviation, aerospace, and mining.
    • Further research can explore optimization for even higher temperatures and diverse environmental conditions.