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Related Experiment Video

Updated: Jul 7, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Multiple harmonic generators for improved efficiency of laser-pumped lasers.

G Cook

    Applied Optics
    |April 20, 1997
    PubMed
    Summary
    This summary is machine-generated.

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    This study demonstrates a multistage system achieving over 97% conversion efficiency for second-harmonic generation. High-efficiency frequency conversion is crucial for laser applications.

    Area of Science:

    • Nonlinear Optics
    • Laser Physics

    Background:

    • Second-harmonic generation (SHG) is vital for frequency conversion in lasers.
    • Improving SHG efficiency is a key challenge in laser technology.

    Purpose of the Study:

    • To enhance the total conversion efficiency from fundamental to second-harmonic wavelengths.
    • To investigate a multistage SHG system for high-power laser applications.

    Main Methods:

    • Utilizing a multistage system with three second-harmonic-generating crystals.
    • Incorporating demagnifying telescopes to manage residual fundamental light between stages.
    • Employing chromatic separation to isolate the second harmonic after each stage.

    Main Results:

    • Achieved over 97% conversion efficiency from 1.06 µm to 532 nm.

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    Last Updated: Jul 7, 2026

    20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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    Published on: July 12, 2017

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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  • Generated >201 mJ of second-harmonic light from 207 mJ of fundamental light.
  • Observed good agreement between experimental results and theoretical predictions for beam evolution.

    • Conclusions:

    • The multistage SHG system effectively boosts conversion efficiency.
    • The proposed method is suitable for high-energy, Q-switched Nd:YAG laser pulses.
    • This technique offers a viable path for efficient laser frequency conversion.