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Updated: Nov 10, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Dynamic focus shaping with mixed-aperture coherent beam combining.

Maike Prossotowicz, Daniel Flamm, Andreas Heimes

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    |April 1, 2021
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    Summary

    Researchers developed dynamic focus shaping using micro-lens arrays (MLAs) for coherent beam combining. This method controls light power distribution, enabling advanced optical focusing applications.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering

    Background:

    • Coherent beam combining is crucial for high-power laser systems.
    • Dynamic control over beam properties, such as focus, is essential for advanced applications.
    • Micro-lens arrays (MLAs) offer a compact and efficient solution for beam manipulation.

    Purpose of the Study:

    • To present a novel concept for dynamic focus shaping.
    • To utilize highly efficient coherent beam combining with MLAs.
    • To demonstrate control over diffraction order power weights by manipulating input beam phases.

    Main Methods:

    • Simulations were performed to support the experimental concept.
    • A proof-of-principle experiment was conducted.
    • An input beam matrix of 5x5 beams was combined using MLAs.

    Main Results:

    • The study successfully demonstrated dynamic focus shaping capabilities.
    • Control over the power weights of diffraction orders was achieved by varying absolute phases.
    • The results confirmed the potential for further power scaling.

    Conclusions:

    • The proposed concept offers a viable method for dynamic focus shaping.
    • Coherent beam combining with MLAs is effective for controlling optical beam characteristics.
    • This technique has implications for scalable, high-performance optical systems.