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Related Experiment Video

Updated: Oct 12, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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High-precision two-dimensional beam steering with a 64-element optical fiber phased array.

Xiaobin Wang, Chunbo Liu, Yang Cao

    Applied Optics
    |November 22, 2021
    PubMed
    Summary

    This study demonstrates a 64-element optical fiber phased array (OFPA) system that uses a novel algorithm to synchronize phases, improving beam quality and steering precision for high-power lasers and communication. The system achieves a 23.7 dB peak sidelobe ratio and 128 kHz steering speed.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Telecommunications

    Background:

    • Large-scale optical fiber phased arrays (OFPAs) are crucial for high-power lasers and high-speed beam steering in detection and communication.
    • Dephasing due to fiber jitter and amplifier noise degrades beam quality and steering precision.

    Purpose of the Study:

    • To demonstrate a 64-element two-dimensional OFPA system for synchronized multi-beam output.
    • To improve beam quality and steering precision in OFPA systems.

    Main Methods:

    • Implementation of a stochastic parallel gradient descent algorithm for phase synchronization.
    • Utilizing multi-beam steering to reduce scan times.
    • Employing an avalanche photodiode array to enhance beam steering voltage precision.

    Main Results:

    • Achieved a peak sidelobe ratio of 23.7 dB for the main beam.
    • Demonstrated a beam steering speed of 128 kHz between arbitrary angles.
    • Successfully generated high-quality multi-beam output.

    Conclusions:

    • The developed OFPA system effectively mitigates dephasing issues.
    • The stochastic parallel gradient descent algorithm enhances OFPA performance for applications requiring precise beam control.
    • The system offers advantages in scan time and steering precision over conventional methods.