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Related Experiment Video

Updated: Jun 20, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Nonincremental coherent optical fiber sensor.

M Martinelli, L De Maria

    Optics Letters
    |September 12, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A new optical fiber sensor enables non-(1)incremental temperature measurements using frequency modulation. This polarimetric sensor achieves absolute temperature readings from 20-100°C, confirmed by experimental data.

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    Area of Science:

    • Optoelectronics
    • Fiber Optic Sensors
    • Metrology

    Background:

    • Traditional fiber optic sensors often rely on incremental measurements, which can be prone to drift and require recalibration.
    • Non-incremental measurement techniques are desirable for robust and absolute sensing applications.

    Purpose of the Study:

    • To report a novel coherent optical fiber sensor for non-incremental measurements of phase-conveyed information.
    • To demonstrate the application of this sensor for absolute temperature measurement.
    • To validate the sensor's performance through experimental data.

    Main Methods:

    • Utilizing a sinusoidally modulated laser source for frequency demodulation.
    • Applying frequency-demodulation techniques typically used for incremental measurements to non-incremental data.

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    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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    Published on: January 7, 2019

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    Last Updated: Jun 20, 2026

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
    08:23

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

    Published on: September 30, 2019

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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    Published on: January 7, 2019

  • Employing a polarimetric fiber-optic sensor configuration.
  • Incorporating a rotating half-wave plate to introduce a frequency carrier for demodulation.

    • Main Results:

    • Successful non-incremental measurement of phase-conveyed information.
    • Achieved absolute temperature measurements in the range of 20-100 degrees C.
    • Experimental data confirmed theoretical predictions for the sensor's performance.
    • Measured sensitivity values were reported.

    Conclusions:

    • The developed coherent optical fiber sensor provides a novel approach for non-incremental measurements.
    • The sensor system is capable of accurate absolute temperature determination.
    • The frequency modulation and demodulation technique is effective for this type of sensing.