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Related Experiment Video

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Composite scanning mechanism based on an aperiodic optical phased array.

Kunyang Du, Rui Wang, Jin Guo

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    |September 14, 2023
    PubMed
    Summary
    This summary is machine-generated.

    A novel composite scanning mechanism using an aperiodic optical phased array (OPA) offers adaptive two-stage scanning. This approach enables high-speed multi-target detection and high-resolution regional scanning, optimizing OPA performance.

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    Area of Science:

    • Optics and Photonics
    • Array Signal Processing

    Background:

    • Optical phased arrays (OPAs) are crucial for beam steering and target detection.
    • Existing OPA systems face challenges in balancing scanning speed, multi-target capabilities, and high-resolution imaging.
    • Grating lobes can degrade the performance of phased array systems.

    Purpose of the Study:

    • To propose a composite scanning mechanism for aperiodic optical phased arrays.
    • To introduce a two-stage scanning mode combining sub-aperture multi-beam and single-beam high-resolution scanning.
    • To optimize array distribution for reduced grating lobes and improved practical applicability of OPAs.

    Main Methods:

    • Development of a composite scanning mechanism based on an aperiodic optical phased array.
    • Implementation of a two-stage scanning mode: sub-aperture multi-beam for broad coverage and single-beam for high resolution.
    • Optimization of phased array element distribution using an adaptive-reference-point-based multi-objective evolutionary algorithm.

    Main Results:

    • The proposed OPA achieves adaptive switching between multi-beam and high-resolution scanning modes.
    • The system retains high-speed, multi-target detection capabilities while enabling focused high-resolution scans.
    • Array distribution optimization effectively reduced grating lobe effects.

    Conclusions:

    • The composite scanning mechanism offers a flexible and efficient approach for OPA applications.
    • The adaptive two-stage scanning mode enhances performance across diverse environmental conditions.
    • This research provides valuable insights for the practical implementation and advancement of optical phased arrays.