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All fiber optic current sensor based on phase-shift fiber loop ringdown structure.

Aodi Yu, Yuhao Huang, Shiyu Li

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    |June 1, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an all fiber optic current sensor (AFOCS) using a phase-shift fiber loop ringdown (PS-FLRD) structure. The novel sensor achieves high sensitivity and a minimum detectable current of 100 mA, offering a simpler alternative to traditional fiber optic current sensors.

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    Area of Science:

    • Photonics and Sensor Technology
    • Electrical Engineering
    • Optical Sensing

    Background:

    • Traditional fiber optic current sensors (FOCS) often require complex polarization control elements.
    • Accurate and sensitive current measurement is crucial in various electrical power systems.
    • Existing FOCS technologies may face limitations in sensitivity, complexity, or operational ease.

    Purpose of the Study:

    • To propose and demonstrate a novel all fiber optic current sensor (AFOCS) with enhanced sensitivity and simplified structure.
    • To investigate the performance of a phase-shift fiber loop ringdown (PS-FLRD) based sensor for current measurement.
    • To analyze and experimentally verify the tunable sensitivity of the proposed AFOCS.

    Main Methods:

    • Implementation of an all fiber optic current sensor utilizing a phase-shift fiber loop ringdown (PS-FLRD) structure.
    • Conversion of current-induced rotation angle to transmittance changes via phase shift measurement.
    • Numerical analysis of current sensitivity, intrinsic phase shift, and fiber loop transmittance.
    • Experimental verification of tunable sensitivity by adjusting modulation frequency.

    Main Results:

    • An optimal current sensitivity of 0.8158°/A was experimentally achieved.
    • The minimum detectable current for the proposed sensor was determined to be at least 100 mA.
    • The sensor demonstrated a simple structure with fewer polarization elements compared to common FOCS.

    Conclusions:

    • The proposed all fiber optic current sensor (AFOCS) based on PS-FLRD offers a promising approach for practical current sensing applications.
    • The sensor exhibits high sensitivity, a simple structure, and ease of operation, outperforming conventional FOCS in certain aspects.
    • Tunable sensitivity and a low minimum detectable current make this AFOCS suitable for diverse industrial needs.