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Zeonex-PMMA microstructured polymer optical FBGs for simultaneous humidity and temperature sensing.

Getinet Woyessa, Jens K M Pedersen, Andrea Fasano

    Optics Letters
    |March 16, 2017
    PubMed
    Summary

    We developed a novel polymer optical fiber Bragg grating sensor for simultaneously measuring relative humidity and temperature. This microstructured optical fiber sensor offers a low-cost, compact solution for multi-parameter monitoring.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Sensor Technology

    Background:

    • Microstructured polymer optical fibers (mPOFs) offer unique light-guiding properties.
    • Fiber Bragg Gratings (FBGs) are widely used for sensing applications.
    • Simultaneous monitoring of environmental parameters like humidity and temperature is crucial in various fields.

    Purpose of the Study:

    • To fabricate and characterize a novel Zeonex/PMMA mPOF Bragg grating sensor.
    • To demonstrate the capability of the sensor for simultaneous monitoring of relative humidity (RH) and temperature.
    • To evaluate the sensor's performance in terms of accuracy and range.

    Main Methods:

    • Fabrication of a Zeonex/PMMA mPOF.
    • Inscribing two separate in-line fiber Bragg gratings (FBGs) within the mPOF.
    • Characterization of the mPOF Bragg grating sensor's response to varying RH and temperature levels.

    Main Results:

    • Successful fabrication and characterization of the Zeonex/PMMA mPOF Bragg grating sensor.
    • Demonstrated simultaneous monitoring of relative humidity and temperature.
    • Achieved a root mean square deviation of 0.8% RH and 0.6°C within the tested ranges (10%-90% RH and 20°C-80°C).

    Conclusions:

    • The developed mPOF Bragg grating sensor enables efficient, simultaneous multi-parameter sensing.
    • This technology presents a low-cost, easily fabricated, and compact sensing solution.
    • The sensor shows high accuracy for both relative humidity and temperature monitoring.