Spectroscopy and laser test emission in Tm3+ : BaYLuF8 single crystal

    Authors

    D. Parisi; S. Veronesi; A. Volpi; M. Gemmi; M. Tonelli; A. Cassanho;H. P. Jenssen

    Comments

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    Abbreviated Journal Title

    J. Phys. D-Appl. Phys.

    Keywords

    2 micron laser; fluoride crystals; spectroscopy; thulium; stark; structure; ABSORPTION; Physics, Applied

    Abstract

    A novel laser material BaYLuF8 (BYLF), doped with 12 at% of Tm3+, has been grown and optically investigated, in order to evaluate its potential performances as a 2 mu m laser. The BYLF crystal is interesting mainly because indications are that the mixed crystal would be sturdier than BaY2F8 (BYF). The addition of lutetium would improve the thermo-mechanical properties of the host. Absorption, fluorescence and lifetime measurements have been performed in the temperature range 10-300 K focusing on the H-3(4) and F-3(4) manifolds, those involved in the laser scheme at 2 mu m. The Stark sublevels structure of Tm3+ up to the D-1(2) manifold has been figured out. Diode-pumped CW laser emission at 2 mu m has been achieved obtaining a slope efficiency of about 28% with respect to the absorbed power, by pumping along the Z-axis. A maximum output power of 240 mW was achieved by pumping along the favourable Y-axis, with an incident power of about 800 mW.

    Journal Title

    Journal of Physics D-Applied Physics

    Volume

    47

    Issue/Number

    2

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    7

    WOS Identifier

    WOS:000329108000005

    ISSN

    0022-3727

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