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    This study explores the Tm:GdScO3 crystal for tunable lasers. It achieves a broad 321 nm tuning range, showing potential for generating ultrashort pulses in the 2-µm range.

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    Area of Science:

    • Solid-state laser materials
    • Spectroscopy and laser physics
    • Perovskite crystal applications

    Background:

    • Thulium-doped (Tm3+) materials are crucial for 2-µm lasers.
    • GdScO3 (GScan) offers potential as a host for Tm3+.
    • Understanding polarized emission is key for laser performance.

    Purpose of the Study:

    • Investigate spectroscopic properties of Tm:GdScO3.
    • Evaluate tunable laser performance along different crystallographic axes.
    • Assess potential for broad bandwidth and ultrashort pulse generation.

    Main Methods:

    • Czochralski crystal growth method.
    • Polarized spectroscopy measurements.
    • Tunable laser operation experiments.

    Main Results:

    • Tm:GdScO3 exhibits strong polarized emission along the b-axis.
    • Achieved the broadest emission bandwidth for Tm3+-doped bulk gain media.
    • Demonstrated tunable laser operation from 1824 nm to 2145 nm (321 nm tuning range).

    Conclusions:

    • Tm:GdScO3 shows significant promise as a gain medium for tunable lasers.
    • Broad emission bandwidth suggests potential for few-optical-cycle pulse generation.
    • Further research into Tm:GdScO3 is warranted for advanced laser applications.