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Diode-pumped mode-locked Yb:BaF2 laser.

Wen-Ze Xue, Zhang-Lang Lin, Huang-Jun Zeng

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    |April 27, 2022
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    Summary

    Researchers achieved continuous-wave and mode-locked laser operation using Ytterbium-doped Barium Fluoride (Yb:BaF2) crystals. This study presents the first demonstration of passively mode-locked Yb:BaF2 laser performance, generating ultrashort pulses.

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    Area of Science:

    • Laser physics
    • Solid-state materials

    Background:

    • Yb:BaF2 is a promising material for laser applications.
    • Previous research has not explored its mode-locked operation.

    Purpose of the Study:

    • To investigate the continuous-wave (CW) and passively mode-locked performance of Yb:BaF2 lasers.
    • To demonstrate ultrashort pulse generation from Yb:BaF2.

    Main Methods:

    • Pumping the Yb:BaF2 crystal with a 976 nm InGaAs laser diode.
    • Utilizing a semiconductor saturable absorber mirror for mode-locking.
    • Characterizing CW output power, wavelength tuning, and ultrashort pulse properties.

    Main Results:

    • Maximum CW output power of 512 mW at 1054.4 nm with 65.0% slope efficiency.
    • Continuous wavelength tuning range of 85 nm (1007-1092 nm).
    • Generation of 52 fs pulses at 1058.2 nm with 129 mW average power.

    Conclusions:

    • Yb:BaF2 is suitable for both CW and passively mode-locked laser operation.
    • This work represents the first successful demonstration of passively mode-locked Yb:BaF2 laser.
    • The results highlight the potential of Yb:BaF2 for generating ultrashort optical pulses.