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High resolution parallel pulse chaotic LiDAR based on AlGaAs micro-ring.

Mingjie Wu, Yudi Zhao, Lehan Zhao

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    |December 19, 2025
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    Summary
    This summary is machine-generated.

    This study introduces a novel AlGaAs micro-ring LiDAR achieving sub-centimeter resolution, significantly outperforming traditional silicon nitride systems. The advanced chaotic lidar offers high-precision ranging for challenging environments.

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    Area of Science:

    • Photonics and Optical Engineering
    • Nonlinear Optics
    • Sensing Technology

    Background:

    • Chaotic lidar systems offer inherent anti-disturbance capabilities due to signal randomness.
    • Traditional silicon nitride (Si3N4) lidar systems have limitations in ranging resolution.

    Purpose of the Study:

    • To develop a sub-centimeter resolution Light Detection and Ranging (LiDAR) system.
    • To leverage the high nonlinearity of Aluminum Gallium Arsenide (AlGaAs) micro-rings for enhanced performance.

    Main Methods:

    • Modeled an AlGaAs lidar system using Lugiato-Lefever (LLE) equations.
    • Generated chaotic pulse signals using a 20% duty-cycle square wave with a 50 μs period.
    • Utilized parallel processing of multi-wavelength optical comb for 3D scanning.

    Main Results:

    • Achieved a theoretical ranging resolution of approximately 0.9 cm, a tenfold improvement over Si3N4 lidar (9.7 cm).
    • Experimental ranging resolution reached ±0.29 cm with a transmit power as low as 10 dBm.
    • Demonstrated a chaotic signal bandwidth of 8.61 GHz, significantly wider than Si3N4 chaos (∼0.85 GHz).

    Conclusions:

    • The developed AlGaAs micro-ring LiDAR offers superior ranging resolution and anti-noise capabilities.
    • The system's high resolution and low power consumption are advantageous for applications in high-interference environments.
    • This technology paves the way for advanced 3D imaging and sensing in demanding conditions.