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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nonlinear Optics

    Background:

    • Structured light generation is crucial for applications in microscopy and fundamental physics.
    • Current methods using spatial light modulators have limitations regarding wavelength, pulse duration, and power.
    • Developing versatile structured light generation techniques is an ongoing research area.

    Purpose of the Study:

    • To present a novel method for generating shaped laser beams.
    • To overcome the limitations of existing structured light generation techniques.
    • To enable structured light generation across a wide range of wavelengths and optical powers.

    Main Methods:

    • Exploiting the frequency difference between higher-order modes due to the Gouy phase.
    • Utilizing cavity mode matching for selective coupling into higher-order modes.
    • Employing optical cavities as spatial filters.
    • Integrating sum-frequency generation in a nonlinear crystal as an output coupler.

    Main Results:

    • Demonstrated a method for generating structured light applicable from UV to IR wavelengths.
    • Enabled the generation of structured light for ultrafast pulses.
    • Showcased the capability to handle a large range of optical powers.
    • Successfully created ultrafast, frequency comb structured light.

    Conclusions:

    • The presented method offers a versatile and powerful approach to structured light generation.
    • This technique overcomes significant limitations of existing spatial light modulator-based methods.
    • The ability to generate structured light across broad spectral ranges and power levels opens new avenues for research and applications.