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In-fiber integrated quasi-distributed high temperature sensor array.

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    This study presents a novel in-fiber high temperature sensor array for demanding environments. The all-silica design enables reliable temperature sensing up to 1000°C.

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    Area of Science:

    • Fiber Optic Sensors
    • High-Temperature Measurement
    • Integrated Optics

    Background:

    • Traditional high-temperature sensors face limitations in harsh environments.
    • Developing robust, quasi-distributed sensing solutions is crucial for industrial applications.
    • In-fiber integration offers advantages in miniaturization and durability.

    Purpose of the Study:

    • To propose and demonstrate an in-fiber integrated quasi-distributed high temperature sensor array.
    • To analyze the characteristics and multiplex capacity of the proposed sensor array.
    • To highlight the suitability of the sensor for space-constrained, high-temperature applications.

    Main Methods:

    • Fabrication of the sensor array by splicing single-mode fiber (SMF) and double-clad fiber (DCF).
    • Analysis of reflected signal characteristics from weakly reflective joint surfaces.
    • Simulation of signal intensity versus the number of sensors to evaluate multiplex capacity.

    Main Results:

    • Successful demonstration of an in-fiber quasi-distributed high temperature sensor array.
    • Characterization of reflected signals and simulation of multiplex capacity.
    • The all-silica structure allows for long-term temperature testing up to 1000°C.

    Conclusions:

    • The proposed sensor array offers a flexible, easily fabricated solution for quasi-distributed high-temperature sensing.
    • Its all-silica structure ensures high-temperature resistance and long-term stability.
    • This technology is beneficial for space-constrained applications requiring reliable high-temperature monitoring.