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Related Experiment Video

Updated: Jul 16, 2025

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Research on laser target dynamic tracking system with rotating polarization grating.

Wei Wang, Yan Dong, Huilin Jiang

    Optics Express
    |September 15, 2023
    PubMed
    Summary

    A novel micromechanical target tracking system uses dual polarization gratings (PGs) for lightweight, miniaturized space laser communication. This system achieved a dynamic target tracking error within 300µrad, demonstrating feasibility for advanced applications.

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    Area of Science:

    • Optics and Photonics
    • Mechanical Engineering
    • Aerospace Engineering

    Background:

    • Traditional laser communication systems face challenges in conformal design, weight, and miniaturization for space applications.
    • Existing tracking systems often lack the integration capabilities required for networked space laser communication.
    • Developing lightweight and compact tracking solutions is crucial for advancing space-based optical networking.

    Purpose of the Study:

    • To design and develop a micromechanical target tracking system using polarization gratings (PGs) for conformal and miniaturized space laser communication.
    • To investigate the application of rotating dual PGs for dynamic laser target tracking.
    • To establish a mathematical model and controller for the dual PGs tracking system and verify its performance.

    Main Methods:

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    • Designed a micromechanical target tracking system incorporating rotating dual polarization gratings (PGs).
    • Defined the relationship between target position and dual PGs angles, enabling multi-coordinate construction and decoupling of beam deflection.
    • Developed a dual PGs mathematical model and a controller for closed-loop operation.
    • Conducted calibration, dynamic verification, and an unmanned aerial vehicle (UAV) tracking experiment.

    Main Results:

    • The dual PGs system demonstrated dynamic tracking of a UAV with a dual-axis closed-loop tracking error within 300µrad (RMSE).
    • The study verified the feasibility of the dual PGs tracking formula and fixed-point closed-loop control.
    • The dynamic closed-loop tracking performance met the required precision for laser communication applications.

    Conclusions:

    • The developed dual polarization gratings tracking system is feasible and effective for dynamic laser target tracking.
    • This system offers a viable solution for lightweight and miniaturized system integration in space laser communication.
    • The dual PGs tracking system shows potential to replace traditional tracking control systems in engineering applications.