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Miniaturized fiber-taper-based Fabry-Perot interferometer for high-temperature sensing.

Zhangwen Liu, Xueguang Qiao, Ruohui Wang

    Applied Optics
    |January 14, 2017
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    Summary

    A novel microminiaturized all-fiber Fabry-Perot interferometer (FPI) was developed for high-temperature sensing. This compact sensor demonstrates excellent sensitivity and performance in extreme temperature environments.

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    Area of Science:

    • Fiber optic sensing
    • Interferometry
    • Materials science

    Background:

    • High-temperature environments pose challenges for conventional sensors.
    • Miniaturized sensors are needed for applications in confined spaces.

    Purpose of the Study:

    • To propose and demonstrate a microminiaturized all-fiber Fabry-Perot interferometer (FPI) for high-temperature sensing.
    • To evaluate the performance of the FPI sensor in terms of temperature sensitivity and operational range.

    Main Methods:

    • Fabrication of an FPI sensor using a micro-air bubble and a taper probe.
    • Experimental characterization of the FPI sensor's response to temperature variations.
    • Utilizing a wavelength of approximately 1550 nm for measurements.

    Main Results:

    • Achieved a temperature sensitivity of 14.68 pm/°C.
    • The FPI sensor features a tip diameter less than 2 μm.
    • Demonstrated functionality in a wide range of temperature variations.

    Conclusions:

    • The microminiaturized all-fiber FPI is a viable solution for high-temperature sensing.
    • Its compact size allows for deployment in ultra-small spaces.
    • The sensor exhibits high sensitivity suitable for demanding applications.