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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Diode-pumped cw bulk Er:Yb:glass laser.

P Laporta, S De Silvestri, V Magni

    Optics Letters
    |September 29, 2009
    PubMed
    Summary

    Continuous-wave laser operation was achieved in bulk erbium-ytterbium phosphate glass. This research demonstrates high output power and slope efficiency for Er:glass lasers, optimizing pumping conditions.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Erbium-ytterbium (Er:Yb) doped glasses are crucial for 1.54 micrometer laser applications.
    • Achieving efficient continuous-wave (CW) laser operation in bulk Er:Yb:glass lasers is essential for various photonic devices.

    Purpose of the Study:

    • To demonstrate continuous-wave laser operation in bulk Er:Yb:phosphate glass.
    • To optimize pumping conditions and investigate the effect of pump wavelength on laser performance.
    • To report the highest slope efficiency for a bulk Er:glass laser.

    Main Methods:

    • Pumping bulk Er:Yb:phosphate glass with an InGaAs diode laser at 980 nm.
    • Utilizing a Ti:Al(2)O(3) laser for pumping at 960 nm and 980 nm to study wavelength effects.
    • Characterizing laser output power and slope efficiency under different pumping conditions.

    Main Results:

    • Achieved CW laser operation at 1.54 microm with 2 mW output power using diode laser pumping.
    • Obtained high output power of 70 mW when pumped by a Ti:Al(2)O(3) laser at 980 nm.
    • Reported the highest slope efficiency to date (21%) for a bulk Er:glass laser at 980 nm.

    Conclusions:

    • Continuous-wave laser operation in bulk Er:Yb:phosphate glass is feasible and efficient.
    • Diode laser pumping at 980 nm offers a viable route for practical Er:Yb:glass laser systems.
    • Optimized pumping conditions yield record-breaking slope efficiency for bulk Er:glass lasers.

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