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High-efficiency 2  μm Tm:YAP laser with a compact mechanical Q-switch.

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    A new diode-pumped, mechanically Q-switched Thulium-doped Yttrium Aluminum Perovskite (Tm:YAP) laser achieves high efficiency near 2 µm. This compact laser system demonstrates significant output power and energy, making it suitable for various applications.

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    Area of Science:

    • Laser Physics
    • Optoelectronics
    • Materials Science

    Background:

    • Diode-pumped solid-state lasers are crucial for various applications.
    • Efficient Q-switching mechanisms are essential for high-power laser generation.
    • Thulium-doped lasers operating near 2 µm offer unique spectral properties.

    Purpose of the Study:

    • To develop a compact and highly efficient diode-pumped Tm:YAP laser.
    • To implement a low-loss, low-power mechanically Q-switched system.
    • To characterize the laser's performance at a 2 µm wavelength.

    Main Methods:

    • Utilized a Tm:YAP crystal as the gain medium.
    • Employed a diode-pumping scheme for efficient energy transfer.
    • Implemented a torsion spring resonant mirror scanner for mechanical Q-switching.

    Main Results:

    • Achieved an average output power of 10.5 W at 1.94 µm.
    • Generated Q-switched pulse energy of 1.05 mJ with a 31 ns pulse duration.
    • Reached a peak power of 34 kW.
    • Demonstrated maximum optical and electrical efficiencies of 51% and 26%, respectively.

    Conclusions:

    • The developed Tm:YAP laser is compact and highly efficient.
    • The mechanically Q-switched system offers negligible optical loss and low drive power.
    • The laser performance is suitable for applications requiring high-power, pulsed 2 µm radiation.