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Linearly configured BOCDA system using a differential measurement scheme.

Ji Ho Jeong, Kyu Hwang Chung, Sang Bae Lee

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    We improved Brillouin optical correlation domain analysis (BOCDA) using a differential measurement. This boosts spatial resolution fourfold and doubles the measurement range for fiber optic sensing.

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    Area of Science:

    • Optoelectronics
    • Fiber optic sensing
    • Photonics

    Background:

    • Brillouin optical correlation domain analysis (BOCDA) is a technique for fiber optic sensing.
    • Existing BOCDA systems face limitations in spatial resolution and measurement range.
    • Enhancements are needed for more precise and extensive fiber characterization.

    Purpose of the Study:

    • To demonstrate an enhanced linearly configured Brillouin optical correlation domain analysis (BOCDA) system.
    • To improve spatial resolution and measurement range using a differential measurement scheme.
    • To achieve superior performance in fiber under test analysis.

    Main Methods:

    • Experimental demonstration of a linearly configured BOCDA system.
    • Implementation of a differential measurement scheme.
    • Utilizing on-off control of pump phase modulation with intentional fiber end loss for Brillouin gain spectrum acquisition.

    Main Results:

    • Achieved a four-fold enhancement in spatial resolution.
    • Doubled the measurement range compared to previous systems.
    • Demonstrated improved performance under identical modulation parameters.

    Conclusions:

    • The differential measurement scheme significantly enhances BOCDA performance.
    • The developed system offers superior spatial resolution and measurement range for fiber optic sensing.
    • This advancement provides a more capable tool for analyzing optical fibers.