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Laser beam array spot steering customized trajectories using the acousto-optic effect.

Amir Guessoum, Abdelhalim Bencheikh

    Applied Optics
    |September 14, 2023
    PubMed
    Summary
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    This study demonstrates acousto-optic laser beam steering along generalized elliptical paths. The technique dynamically controls diffraction orders, offering novel trajectory shaping for optical systems.

    Area of Science:

    • Optics and Photonics
    • Acousto-Optics
    • Laser Beam Manipulation

    Background:

    • Acousto-optic devices enable light modulation and beam steering.
    • Controlling laser beam trajectories is crucial for various optical applications.
    • Dynamic phase gratings offer versatile light manipulation capabilities.

    Purpose of the Study:

    • To demonstrate a proof of principle for array laser beam steering along generalized elliptical paths.
    • To explore the dynamic trajectories of diffraction orders generated by a 2D sinusoidal phase grating.
    • To propose a novel representation for trajectory shapes using sphere volumes.

    Main Methods:

    • Utilizing the acousto-optic effect to generate a dynamic 2D sinusoidal phase grating.
    • Employing two crossed acoustic waves with frequency modulation and phase difference.

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  • Analyzing the diffraction orders of a Gaussian beam interacting with the dynamic grating.

    • Main Results:

    • Demonstrated laser beam steering along linear, circular, and generalized elliptical paths.
    • Observed dynamic trajectories of diffraction orders influenced by acoustic wave modulation.
    • Proposed a sphere volume representation analogous to Poincaré and Bloch spheres for trajectory shapes.

    Conclusions:

    • The acousto-optic technique provides a viable method for generalized elliptical laser beam steering.
    • The dynamic nature of the phase grating allows for versatile trajectory control of diffraction orders.
    • The proposed sphere volume representation offers a unified framework for understanding trajectory dynamics.