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Related Experiment Video

Updated: Dec 14, 2025

Thermal Measurement Techniques in Analytical Microfluidic Devices
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Highly sensitive temperature sensing probes based on liquid cladding elliptical micro/nanofibers.

Wa Jin, Xia Li, Shuhui Wu

    Optics Express
    |July 19, 2020
    PubMed
    Summary

    A novel liquid cladding elliptical microfiber probe offers highly sensitive, remote temperature measurements. This specialized fiber optic sensor effectively isolates temperature changes for accurate real-world applications.

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    Area of Science:

    • Optoelectronics and Photonics
    • Fiber Optic Sensing Technology
    • Nanofabrication and Materials Science

    Background:

    • Accurate temperature monitoring is crucial across various scientific and industrial fields.
    • Existing fiber optic sensors can be susceptible to environmental interference, limiting their real-world applicability.
    • Micro/nanofiber technology offers unique evanescent field interactions for enhanced sensing capabilities.

    Purpose of the Study:

    • To propose and demonstrate a highly sensitive temperature probe utilizing a liquid cladding elliptical micro/nanofiber.
    • To leverage evanescent field coupling within a fiber loop mirror for remote temperature sensing.
    • To enhance sensor specificity by minimizing cross-sensitivity to environmental parameters other than temperature.

    Main Methods:

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    • Fabrication of an elliptical micro/nanofiber with a liquid cladding (isopropanol).
    • Integration of the micro/nanofiber into a fiber loop mirror configuration with an output port probe.
    • Utilizing evanescent field coupling for signal transduction and remote measurement.

    Main Results:

    • The proposed sensor demonstrated high sensitivity to temperature variations.
    • An isopropanol-clad elliptical microfiber (3.4 µm diameter) achieved a sensitivity of -16.38 nm/°C.
    • The liquid cladding effectively shielded the sensor from external disturbances and environmental factors, ensuring temperature-specific detection.

    Conclusions:

    • The liquid cladding elliptical micro/nanofiber probe is a promising platform for high-sensitivity, remote temperature measurements.
    • The design effectively isolates temperature as the primary sensing parameter, suitable for demanding applications.
    • This approach offers a robust solution for real-world temperature monitoring challenges.