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    A novel broadband chaos laser was used for optical time domain reflectometry (OTDR), achieving high resolution and long detection distances. This self-chaotic microcavity laser offers advantages over traditional methods for practical OTDR applications.

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    Area of Science:

    • Optoelectronics
    • Photonics
    • Optical Sensing

    Background:

    • Optical Time Domain Reflectometry (OTDR) is crucial for fiber optic network characterization.
    • Existing OTDR systems can face limitations in resolution and detection range.
    • Chaos lasers offer unique broadband properties for enhanced optical measurements.

    Purpose of the Study:

    • To investigate the application of a self-chaotic microcavity laser in OTDR.
    • To evaluate the performance of this laser in terms of range resolution and detection distance.
    • To demonstrate the potential advantages of this laser source for correlation OTDR.

    Main Methods:

    • A self-chaotic circular-sided square microcavity laser with a 12.9 GHz chaos bandwidth was employed.
    • The laser was integrated into an optical time domain reflectometry setup.
    • Experimental measurements were conducted to assess range resolution and detection capabilities.

    Main Results:

    • Achieved a range resolution of 4.5 mm.
    • Demonstrated a detection distance of 25 km.
    • The laser exhibited a flatness of ±3 dB and lacked extra correlation peaks seen in other chaotic lasers.

    Conclusions:

    • The self-chaotic microcavity laser is a viable and effective light source for OTDR.
    • This laser technology enables high-resolution and long-distance measurements in optical sensing.
    • The absence of correlation peaks suggests improved practical applicability for correlation OTDR.