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    This study introduces a mid-infrared chaos lidar for long-distance atmospheric sensing. This new system offers high accuracy and precision, overcoming limitations of near-infrared lidar systems.

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    Area of Science:

    • Optics and Photonics
    • Remote Sensing Technology
    • Laser Physics

    Background:

    • Chaos lidars utilize chaotic laser signals for target detection, offering robust anti-jamming capabilities.
    • Existing chaos lidar systems primarily operate in the near-infrared spectrum, facing significant atmospheric attenuation.
    • Atmospheric transmission windows in the mid-infrared offer reduced signal loss for long-range applications.

    Purpose of the Study:

    • To demonstrate a mid-infrared chaos lidar system for enhanced atmospheric ranging and imaging.
    • To investigate the performance of mid-infrared chaos lidar in terms of accuracy and precision.
    • To establish the minimum signal-to-noise ratio requirements for effective mid-infrared chaos lidar operation.

    Main Methods:

    • Development of a proof-of-concept mid-infrared chaos lidar system.
    • Utilization of an interband cascade laser with optical feedback as the chaos source.
    • Experimental validation of ranging accuracy and precision at various distances.

    Main Results:

    • The mid-infrared chaos lidar achieved ranging accuracy better than 0.9 cm and precision better than 0.3 cm.
    • Effective ranging was demonstrated for distances up to 300 cm.
    • A minimum signal-to-noise ratio of 1 dB was sufficient for sub-centimeter accuracy and precision.

    Conclusions:

    • Mid-infrared chaos lidar is a viable technology for long-reach atmospheric ranging and imaging.
    • The developed system overcomes the atmospheric attenuation limitations of near-infrared chaos lidars.
    • This research enables the future development of remote sensing systems in the mid-infrared spectrum.