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Laser-diode end-pumped Tm(3+):YAG eye-safe laser.

T Yokozawa, H Hara

    Applied Optics
    |November 19, 2010
    PubMed
    Summary

    This study investigated a laser-diode end-pumped Thulium-doped Yttrium Aluminum Garnet (Tm:YAG) laser. Cooling the Tm:YAG crystal improved lasing performance, demonstrating temperature-dependent characteristics.

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    Area of Science:

    • Laser physics
    • Solid-state lasers
    • Optoelectronics

    Background:

    • Thulium-doped Yttrium Aluminum Garnet (Tm:YAG) lasers are crucial for various applications.
    • Understanding their lasing characteristics is essential for optimizing performance.
    • Laser-diode end-pumping offers an efficient excitation method.

    Purpose of the Study:

    • To investigate the lasing characteristics of a laser-diode end-pumped Tm:YAG laser.
    • To evaluate the effect of temperature on laser performance.
    • To measure key parameters such as output power, slope efficiency, and threshold power.

    Main Methods:

    • Utilized a laser-diode to end-pump a Tm:YAG crystal.
    • Operated the laser at room temperature and various cooled conditions.
    • Measured laser output power, slope efficiency, and threshold power.
    • Analyzed the temperature dependence of these parameters.

    Main Results:

    • Achieved a maximum laser output power of 124 mW.
    • Recorded a slope efficiency of 36% at room temperature.
    • Determined a threshold power of 77 mW at room temperature.
    • Observed improved lasing performance upon cooling the Tm:YAG crystal.

    Conclusions:

    • The performance of the laser-diode end-pumped Tm:YAG laser is significantly influenced by crystal temperature.
    • Cooling enhances both slope efficiency and reduces threshold power.
    • Further optimization of Tm:YAG lasers can be achieved through thermal management.

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