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    Area of Science:

    • Photonics and Optical Engineering
    • Solid-State Physics
    • Lidar Technology

    Background:

    • Next-generation lidar demands compact, solid-state beam steering.
    • Previous swept-source lidar required multiple sweeps per frame.
    • Integrating beam steering onto a chip is a key challenge.

    Purpose of the Study:

    • To develop a chip-scale, solid-state lidar with dual-axis active beam steering.
    • To enable full 2D frame acquisition within a single wavelength sweep.
    • To improve lidar imaging frame rates and compactness.

    Main Methods:

    • Utilized a silicon-photonic optical phased array (OPA) for fast-axis beam steering.
    • Reassigned dispersive beam steering to the slow axis for vertical control.
    • Employed frequency-modulated continuous-wave (FMCW) ranging with a tunable laser.

    Main Results:

    • Achieved ~50° horizontal beam steering with a 32-channel OPA.
    • Added ~5° vertical beam steering via wavelength tuning.
    • Demonstrated 10 Hz 3D imaging frame rates with a single sweep.

    Conclusions:

    • This work presents the first active, dual-axis, on-chip, solid-state swept-source lidar.
    • The chip-scale architecture enables efficient 2D frame formation within a single sweep.
    • The system offers a pathway to next-generation compact and high-performance lidar applications.