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Related Experiment Video

Updated: Jul 16, 2025

Thermal Measurement Techniques in Analytical Microfluidic Devices
08:29

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

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PDMS-filled micro-spring Fabry-Perot cavity for temperature sensing.

Cao Simin, Shang Xinggang, Zhang Lei

    Optics Express
    |September 15, 2023
    PubMed
    Summary

    A novel fiber-tipped temperature sensor uses a polydimethylsiloxane (PDMS)-filled spring Fabry-Perot (FP) cavity for highly sensitive measurements. This PDMS-based sensor achieves a sensitivity of 704.3 pm/°C, offering customizable temperature sensing capabilities.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Sensor Technology

    Background:

    • Fiber-optic sensors offer advantages in harsh environments.
    • Fabry-Perot (FP) cavities are sensitive optical resonators.
    • Polydimethylsiloxane (PDMS) exhibits significant thermal expansion.

    Purpose of the Study:

    • To propose and demonstrate a highly sensitive fiber-tipped temperature sensor.
    • To leverage PDMS's thermal properties for enhanced sensing.
    • To enable customizable temperature sensing with adjustable sensitivity.

    Main Methods:

    • Fabrication of a spring FP cavity on a fiber endface using two-photon polymerization lithography.
    • Filling the cavity with PDMS to create a functional sensing element.
    • Characterization of the sensor's temperature sensitivity and stability.

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    Main Results:

    • Achieved a maximal temperature sensitivity of 704.3 pm/°C.
    • Demonstrated excellent operating repeatability and stability.
    • Showcased adjustable sensitivity in the range of 100-700 pm/°C by tuning the spring constant.

    Conclusions:

    • The PDMS-filled spring FP sensor offers high sensitivity and stability for temperature measurement.
    • The sensor's design allows for precise adjustment of sensitivity, enabling customizable applications.
    • This technology holds promise for various temperature sensing applications requiring high accuracy and adaptability.