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Ultraviolet solid-state Ce:YLF laser at 325 nm.

D J Ehrlich, P F Moulton, R M Osgood

    Optics Letters
    |August 19, 2009
    PubMed
    Summary
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    Researchers observed stimulated emission from a rare-earth-doped crystal using cerium ions (Ce+3) in lithium yttrium fluoride (YLF). This resulted in the shortest wavelength yet from an optically pumped solid-state laser at 325.5 nm.

    Area of Science:

    • Solid-state laser physics
    • Quantum electronics
    • Materials science

    Background:

    • Rare-earth-doped crystals are crucial for laser development.
    • Stimulated emission underpins laser operation.
    • Achieving shorter wavelengths in solid-state lasers is a key research goal.

    Purpose of the Study:

    • To report the first observation of stimulated emission from a 5d-4f transition in a triply ionized rare-earth-doped crystal.
    • To investigate the potential of cerium-doped LiYF(4) (YLF) for generating short-wavelength coherent radiation.
    • To explore the tunability of the Ce:YLF laser system.

    Main Methods:

    • Optical pumping of Ce(+3) ions in LiYF(4) at 249 nm.
    • Spectroscopic analysis of the emitted radiation.

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  • Characterization of the fluorescence linewidth.

    • Main Results:

    • Observed stimulated emission from a 5d-4f transition in Ce(+3):YLF.
    • Achieved laser emission at 325.5 nm, the shortest wavelength reported for an optically pumped solid-state laser.
    • Measured a large fluorescence linewidth, indicating potential for tunability.

    Conclusions:

    • The Ce:YLF laser system demonstrates efficient generation of near-ultraviolet coherent radiation.
    • The observed 325.5 nm emission represents a significant advancement in short-wavelength solid-state lasers.
    • The Ce:YLF laser is a promising tunable source for the 305-335 nm range.