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Continuous-wave and Q-switched Tb:YLF lasers at 587 nm.

Leonid Kotov, Yushi Kaneda, Stefan Püschel

    Optics Express
    |August 13, 2025
    PubMed
    Summary

    Researchers achieved 1 W continuous-wave output from a Terbium-doped Yttrium Lithium Fluoride (Tb:YLF) laser at 587 nm. They also demonstrated the first orange-spectrum Q-switched laser, crucial for next-generation ozone monitoring.

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    Area of Science:

    • Laser Physics
    • Spectroscopy
    • Atmospheric Science

    Background:

    • Terbium-doped Yttrium Lithium Fluoride (Tb:YLF) lasers are potential candidates for atmospheric sensing applications.
    • Developing efficient laser sources in the orange spectral region is critical for ozone differential absorption lidar (DIAL) systems.
    • Previous Tb:YLF laser research has not achieved high continuous-wave (CW) power or demonstrated Q-switched operation in the orange spectrum.

    Purpose of the Study:

    • To report the highest CW output power from a Tb:YLF laser at 587 nm.
    • To demonstrate the first actively Q-switched operation of a Tb:YLF laser in the orange spectral region.
    • To assess the potential of this laser system for next-generation ozone DIAL applications.

    Main Methods:

    • Continuous-wave (CW) laser operation of a Tb:YLF crystal was investigated.

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  • Actively Q-switched operation was implemented for the Tb:YLF laser.
  • Output power, energy, pulse duration, and repetition rate were measured.

    • Main Results:

    • Achieved up to 1 W CW output power from the Tb:YLF laser at 587 nm.
    • Demonstrated the first actively Q-switched operation in the orange spectral region, yielding 0.5 mJ pulse energy with 100 ns pulse duration at 500 Hz.
    • Observed unstable behavior during CW operation.

    Conclusions:

    • The developed Tb:YLF laser system shows significant promise as a next-generation ozone DIAL laser source.
    • The achieved output power and Q-switched performance represent key advancements for atmospheric monitoring.
    • Further investigation into stabilizing CW operation is warranted.