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High-power monolithic unstable-resonator solid-state laser.

H Liu, S H Zhou, Y C Chen

    Optics Letters
    |December 18, 2007
    PubMed
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    We developed a diode-pumped Q-switched solid-state laser using an unstable resonator. This laser effectively suppresses beam instability, producing high-quality, single-mode laser pulses.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Diode-pumped solid-state lasers are crucial for various applications.
    • Achieving high-quality, stable laser output, especially in disk-shaped geometries, presents challenges.
    • Unstable resonators are explored for beam quality improvement.

    Purpose of the Study:

    • To demonstrate the operational capability of a diode-pumped monolithic Q-switched unstable-resonator solid-state laser.
    • To evaluate the effectiveness of an unstable resonator in stabilizing laser beam properties.
    • To investigate laser performance in disk-shaped laser media with large transverse dimensions.

    Main Methods:

    • Utilized a diode-pumped monolithic Q-switched laser architecture.
    • Incorporated an unstable resonator design.

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  • Employed a disk-shaped solid-state laser medium.
  • Characterized laser output for transverse and longitudinal mode properties, pulse energy, and duration.

    • Main Results:

    • Successfully operated the Q-switched unstable-resonator solid-state laser.
    • Generated 2.15-mJ, 2-ns pulses.
    • Achieved single transverse mode and single longitudinal mode operation.
    • Demonstrated effective suppression of spatial and temporal instability in the laser beam.
    • Confirmed the resonator's efficacy in disk-shaped lasers with large transverse dimensions.

    Conclusions:

    • The diode-pumped monolithic Q-switched unstable-resonator solid-state laser is operational and effective.
    • Unstable resonators are a viable method for enhancing beam stability and quality in specific laser geometries.
    • This laser design offers a promising solution for applications requiring high-energy, stable, single-mode laser pulses.