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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Simple high-efficiency TEM(00) diode-laser-pumped Q-switched laser.

R S Afzal, M D Selker

    Optics Letters
    |October 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    Demonstration and characterization of a multibillion-shot, 2.5-mJ, 4-ns, Q-switched Nd:YAG laser.

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    Efficient, diode-laser-pumped, diode-laser-seeded, high-peak-power Nd:YLF regenerative amplifier.

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    Modeling of a Diode-Side-Pumped Nd:YAG Laser.

    Applied optics·2008

    A novel diode-laser-pumped Q-switched Nd:YAG laser achieves high performance using a zigzag slab geometry. This efficient laser system demonstrates excellent output power and harmonic generation, rivaling traditional methods.

    Area of Science:

    • Laser physics and engineering
    • Materials science for laser gain media

    Background:

    • Diode-laser-pumped solid-state lasers offer advantages in efficiency and compactness.
    • Q-switching is a technique to achieve high peak power laser pulses.
    • Nd:YAG lasers are widely used in various scientific and industrial applications.

    Purpose of the Study:

    • To develop a simple and efficient diode-laser-pumped Q-switched Nd:YAG laser.
    • To demonstrate high-energy, short-pulse generation with excellent beam quality.
    • To investigate the potential for efficient harmonic generation.

    Main Methods:

    • Utilized a zigzag slab geometry for the Nd:YAG gain medium.
    • Employed side pumping with a single high-power quasi-continuous-wave diode bar.
    • Operated the laser in a Q-switched mode to produce nanosecond pulses.

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  • Measured laser output characteristics, including pulse energy, pulse duration, repetition rate, and beam quality (TEM00).
  • Evaluated second and fourth harmonic generation efficiencies.

    • Main Results:

    • Achieved 2.25 mJ, TEM00, 4-ns pulses at up to 90 Hz with only 20 mJ of pump power.
    • Demonstrated long-pulse and Q-switched slope efficiencies of 28% and 19%, respectively.
    • Obtained second-harmonic generation efficiency greater than 50% and fourth-harmonic generation efficiency greater than 20% at 1064 nm.
    • Performance approached that of longitudinal pumping configurations.

    Conclusions:

    • The developed diode-laser-pumped Q-switched Nd:YAG laser is highly efficient and simple.
    • The zigzag slab geometry and side-pumping scheme are effective for high-power laser operation.
    • The laser system shows significant potential for applications requiring high peak power and efficient frequency conversion.