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Updated: Jun 22, 2026

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Efficient, diode-pumped Tm(3)+:BaY(2)F(8) vibronic laser.

F Cornacchia, D Parisi, C Bernardini

    Optics Express
    |May 29, 2009
    PubMed
    Summary
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    This study details Thulium-doped Barium Yttrium Fluoride (BaY2F8) laser performance. Optimized crystals achieved high efficiency and tunable wavelengths for potential infrared applications.

    Area of Science:

    • Materials Science
    • Laser Physics
    • Solid-State Spectroscopy

    Background:

    • Single crystals are crucial for advanced laser applications.
    • Thulium (Tm) doping offers unique spectroscopic properties for infrared emission.
    • Barium Yttrium Fluoride (BaY2F8) is a promising host material for rare-earth ions.

    Purpose of the Study:

    • To investigate the spectroscopic and laser characteristics of Thulium-doped BaY2F8 single crystals.
    • To evaluate the performance of these crystals under diode-laser pumping.
    • To determine the influence of Thulium concentration on laser output and wavelength.

    Main Methods:

    • Single crystals of BaY2F8 doped with Thulium (2-18 at.%) were grown using the Czochralski technique.
    • Spectroscopic measurements were performed to analyze optical properties.

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  • Room-temperature laser experiments were conducted using a 789 nm laser diode pump source.

    • Main Results:

    • Maximum optical-to-optical efficiency reached 61% with an output power of 290 mW.
    • Minimum lasing threshold was as low as 26 mW.
    • Lasing wavelength was tunable from 1927 nm to 2030 nm, dependent on Thulium concentration.
    • The nature of the optical transition shifted from purely electronic to vibronic with increasing dopant concentration.

    Conclusions:

    • Thulium-doped BaY2F8 crystals exhibit excellent laser performance.
    • The tunability and efficiency make these crystals suitable for various infrared laser applications.
    • Further research can optimize crystal growth and doping for specific wavelength requirements.