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Updated: Jun 23, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Diode-pumped high-efficiency Tm:YAG lasers.

C Li, J Song, D Shen

    Optics Express
    |April 28, 2009
    PubMed
    Summary
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    Researchers developed an eye-safe solid-state laser operating at 2 mm wavelength. This Tm:YAG laser achieved 760 mW output power with high efficiency, demonstrating potential for various applications.

    Area of Science:

    • Optics and Photonics
    • Solid-State Laser Technology

    Background:

    • 2 mm wavelength solid-state lasers are crucial for medical, remote sensing, and military applications.
    • Developing efficient and eye-safe laser sources at this wavelength is an ongoing research area.

    Purpose of the Study:

    • To demonstrate a high-power, efficient, and eye-safe solid-state laser operating at 2 mm wavelength.
    • To investigate the performance of a Thulium-doped Yttrium Aluminum Garnet (Tm:YAG) laser under continuous wave (CW) and Q-switched operation.

    Main Methods:

    • Utilized a 3-W continuous wave (CW) laser-diode for pumping a Tm:YAG crystal.
    • Operated the laser under CW conditions to measure output power and efficiency.
    • Employed acousto-optic Q-switching to generate pulsed laser output.

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    Main Results:

    • Achieved 760 mW of CW output power at 2.01 mm wavelength from the Tm:YAG laser.
    • Recorded a slope efficiency of 44% and an optical-to-optical efficiency of 36% under CW operation.
    • Generated laser pulses with 1.2 mJ energy and a 380 ns full width at half maximum (FWHM) duration in acousto-optic Q-switched mode.

    Conclusions:

    • The developed Tm:YAG laser system offers a promising eye-safe solid-state laser source at 2 mm.
    • The high efficiencies and pulsed capabilities indicate suitability for demanding applications in medicine, remote sensing, and defense.