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Related Experiment Video

Updated: Dec 21, 2025

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Cladding-pumped, Yb:YAG-core, fiber-like waveguide laser: modeling and experiment.

Viktor Fromzel, Nikolay Ter-Gabrielyan, Mark Dubinskii

    Optics Express
    |May 15, 2020
    PubMed
    Summary

    We modeled cladding-pumped Yb:YAG waveguide lasers, optimizing efficiency by analyzing doping and dimensions. Core temperature limits power scaling, but experiments achieved 41.6 W output.

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    Area of Science:

    • Laser Physics
    • Materials Science
    • Optical Engineering

    Background:

    • Fiber-like waveguide lasers offer unique advantages for high-power applications.
    • ytterbium-doped YAG (Yb:YAG) is a key material for efficient laser operation.
    • Cladding-pumped architectures enable effective energy deposition.

    Purpose of the Study:

    • To develop a predictive model for cladding-pumped Yb:YAG-core waveguide laser performance.
    • To analyze the impact of Yb-doping concentration and waveguide parameters on efficiency.
    • To identify conditions for maximizing pump and laser efficiencies and understand power scaling limitations.

    Main Methods:

    • Development of a theoretical model for waveguide laser performance.
    • Analysis of pump absorption and laser output efficiencies.

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  • Experimental validation using a double-clad Yb:YAG waveguide laser.
  • Cladding-pumped configuration utilizing a fiber-coupled laser diode module.

    • Main Results:

    • The model accurately predicts laser performance based on waveguide parameters and doping.
    • Optimal conditions for maximizing pump and laser efficiencies were determined.
    • Core temperature was identified as the primary factor limiting power scaling.
    • Experimental validation achieved 41.6 W output power and 73% slope efficiency.

    Conclusions:

    • The developed model provides a valuable tool for designing high-performance Yb:YAG waveguide lasers.
    • Waveguide design, cavity parameters, and core temperature influence laser output wavelength (1030 or 1050 nm).
    • Experimental results confirm the model's predictions, demonstrating the potential for efficient high-power laser operation.