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    Researchers achieved record 31.3 W vortex laser power using an interferometric output coupler. This breakthrough enables high-power applications in material processing, optical manipulation, and communications.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics

    Background:

    • High-power vortex light is crucial for advanced applications but has been limited by low power output.
    • Existing methods struggle to achieve the necessary power levels for widespread adoption.

    Purpose of the Study:

    • To demonstrate a record high-power vortex laser output.
    • To develop a robust and efficient method for generating vortex beams directly from a laser.

    Main Methods:

    • Utilized an interferometric mode transforming output coupler to convert a fundamental mode Nd:YVO4 laser into a LG01 vortex output.
    • Employed Q-switching at pulse rates up to 600 kHz.
    • Investigated varying output coupling transmissions and compared with theoretical models.

    Main Results:

    • Achieved a record vortex average power of 31.3 W with 95.2% LG01 modal purity.
    • Demonstrated >30W laser power in a high-quality HG10 mode.
    • Obtained a high slope efficiency of 62.5%.

    Conclusions:

    • The interferometric output coupler is a suitable method for creating robust, high-power, turn-key vortex lasers.
    • The demonstrated technology offers high efficiency, high modal purity, and scalable power and pulse rate.
    • This advancement paves the way for enhanced applications in material processing, optical manipulation, and communications.