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Related Experiment Video

Updated: Apr 16, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Published on: November 7, 2016

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Differential-pressure-based fiber-optic temperature sensor using Fabry-Perot interferometry.

Tiegen Liu, Jinde Yin, Junfeng Jiang

    Optics Letters
    |March 14, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new fiber-optic Fabry-Perot interferometric (FFPI) temperature sensor. It leverages sealed air thermal expansion for accurate, high-resolution temperature measurements.

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    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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    Area of Science:

    • Optoelectronics
    • Sensor Technology
    • Materials Science

    Background:

    • Fiber-optic sensors offer advantages in harsh environments.
    • Accurate temperature sensing is crucial for various applications.
    • Fabry-Perot interferometers (FPI) are sensitive to physical changes.

    Purpose of the Study:

    • To develop a novel fiber-optic Fabry-Perot interferometric (FFPI) temperature sensor.
    • To utilize the differential pressure from sealed air thermal expansion for temperature sensing.
    • To investigate the design flexibility and performance of the FFPI sensor.

    Main Methods:

    • Constructed an FFPI sensor using a silicon diaphragm between Pyrex plates with micro-circular cavities.
    • Sealed air within cavities creates differential pressure upon temperature change, deforming the diaphragm.
    • Analyzed the relationship between diaphragm parameters, differential pressure, and temperature sensitivity.

    Main Results:

    • Achieved a temperature sensitivity of 6.07 nm/°C.
    • Demonstrated a resolution of 0.10°C within the -50°C to 100°C range.
    • Reported a response time of approximately 1.3 seconds for a significant temperature change.

    Conclusions:

    • The novel FFPI temperature sensor effectively translates thermal expansion into measurable optical shifts.
    • Flexible design parameters allow for tailored temperature sensitivity.
    • The sensor exhibits high sensitivity, resolution, and rapid response, suitable for demanding applications.