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Upconversion-pumped blue laser in Tm:YAG.

B P Scott, F Zhao, R S Chang

    Optics Letters
    |October 6, 2009
    PubMed
    Summary

    Researchers demonstrated an upconversion-pumped blue laser using thulium-doped yttrium aluminum garnet (Tm:YAG) crystals at cryogenic temperatures. Investigations also explored room-temperature laser possibilities for Tm:YAG.

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    Area of Science:

    • Laser Physics
    • Materials Science
    • Quantum Electronics

    Background:

    • Upconversion lasers offer pathways to shorter wavelengths.
    • Thulium-doped materials are promising for visible and near-infrared emission.
    • Cryogenic cooling can enhance laser performance by reducing non-radiative decay.

    Purpose of the Study:

    • To demonstrate an upconversion-pumped blue laser in Tm:YAG.
    • To investigate the feasibility of room-temperature upconversion lasing in Tm:YAG.
    • To assess different Tm:YAG transitions for laser applications.

    Main Methods:

    • Utilized cryogenic temperatures for laser operation.
    • Employed upconversion pumping schemes.
    • Measured laser performance on specific Tm:YAG energy bands.

    Main Results:

    • Successfully demonstrated an upconversion-pumped blue laser at the (1)G(4)-(3)H(6) band of Tm:YAG under cryogenic conditions.
    • Collected data on the potential for room-temperature upconversion lasing in Tm:YAG.
    • Evaluated both the (1)G(4)-(3)H(6) and (1)D(2)-(3)F(4) bands for laser potential.

    Conclusions:

    • Upconversion-pumped blue lasing in Tm:YAG is achievable at cryogenic temperatures.
    • Further research is needed to realize efficient room-temperature upconversion lasers in Tm:YAG.
    • Tm:YAG shows potential for visible laser applications across different temperature regimes.

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