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Updated: Jun 12, 2026

Fabrication and Testing of Photonic Thermometers
08:44

Fabrication and Testing of Photonic Thermometers

Published on: October 24, 2018

Fiber-optic thermometric probe utilizing GRIN lenses.

G Conforti, M Brenci, A Mencaglia

    Applied Optics
    |June 16, 2010
    PubMed
    Summary

    This study introduces a novel multimode optical fiber thermometer. It uses a thermochromic solution and graded-index microlenses for accurate, efficient temperature sensing.

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    Area of Science:

    • Optoelectronics
    • Fiber optics
    • Temperature sensing

    Background:

    • Accurate temperature measurement is crucial in various scientific and industrial applications.
    • Traditional thermometers may face limitations in harsh environments or for remote sensing.
    • Optical fiber-based sensors offer potential advantages in electromagnetic immunity and miniaturization.

    Purpose of the Study:

    • To describe a novel multimode optical fiber thermometer.
    • To present the technical details and working principle of the developed probe.
    • To demonstrate the performance through calibration tests.

    Main Methods:

    • Utilized a single multimode optical fiber for both light guiding and sensing.
    • Employed a thermochromic solution as a differential absorption temperature transducer.
    • Incorporated graded-index microlenses for high coupling efficiency between the fiber and transducer.

    Main Results:

    • Achieved high coupling efficiency with a novel probe design.
    • Presented technical data for the electro-optic unit.
    • Provided calibration test results for the optical fiber thermometer.

    Conclusions:

    • The developed multimode optical fiber thermometer offers a novel approach to temperature sensing.
    • The design utilizing graded-index microlenses enhances sensor efficiency.
    • The presented data and calibration tests validate the thermometer's functionality.

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