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Tailoring light intensity along caustic trajectories.

Dafne Amaya, Lorena Baum, Óscar Martínez-Matos

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    This summary is machine-generated.

    Designing curved beams with tailored intensity is now possible. This framework links spectral signals to wave field amplitude, enabling precise control for applications like optical trapping and laser micromachining.

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    Area of Science:

    • Optics and Photonics
    • Wave Engineering

    Background:

    • Tailoring intensity distribution along curved beam trajectories presents a significant design challenge.
    • Existing methods lack robust theoretical frameworks for complex curved paths.

    Purpose of the Study:

    • To develop a theoretical framework for controlling the intensity distribution of curved beams.
    • To establish a relationship between input spectral signals and propagated wave field amplitude.

    Main Methods:

    • Derivation of a general closed-form expression relating field amplitude to spectral amplitude and the third derivative of spectral phase.
    • Utilizing a spatial light modulator to encode the input spectral signal.
    • Experimental validation using a cubic spectral phase.

    Main Results:

    • A robust theoretical framework applicable to both monotonic and nonmonotonic curved trajectories.
    • Demonstrated ability to engineer beam intensity by selecting spectral amplitude and phase.
    • Experimental results confirm theoretical predictions.

    Conclusions:

    • The proposed framework provides a foundation for engineering curved beams with precisely controlled intensity.
    • This enables applications requiring specific intensity modulation along beam paths, such as optical trapping and laser micromachining.