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Thermally induced depolarization in terbium gallium garnet ceramics rod with natural convection cooling

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    0480075 - FZÚ 2018 RIV GB eng J - Článek v odborném periodiku
    Slezák, Ondřej - Yasuhara, R. - Lucianetti, Antonio - Vojna, David - Mocek, Tomáš
    Thermally induced depolarization in terbium gallium garnet ceramics rod with natural convection cooling.
    Journal of Optics. Roč. 17, č. 6 (2015), s. 1-8, č. článku 065610. ISSN 2040-8978
    Grant CEP: GA MŠk ED2.1.00/01.0027; GA MŠk EE2.3.20.0143; GA MŠk EE2.3.30.0057
    Grant ostatní:HILASE(XE) CZ.1.05/2.1.00/01.0027; OP VK 6(XE) CZ.1.07/2.3.00/20.0143; OP VK 4 POSTDOK(XE) CZ.1.07/2.3.00/30.0057
    Institucionální podpora: RVO:68378271
    Klíčová slova: stress-induced birefringence * thermal depolarization * high-power lasers
    Kód oboru RIV: BH - Optika, masery a lasery
    Obor OECD: Optics (including laser optics and quantum optics)
    Impakt faktor: 1.847, rok: 2015

    Thermal birefringence-induced depolarization in terbium gallium garnet (TGG) ceramic rods has been numerically evaluated for the geometry and heating conditions in a previous experiment. In this model, the spatially resolved heat transfer coefficient corresponding to natural convection cooling and the offset of the beam from the rotational axis of the rod have been incorporated and the realistic beam profile used in the experiment has been considered. A resulting beam depolarization ratio of 4.3 x 10(-4) has been calculated for an input power of 117 W. The results were found to be in good agreement with the measured values. Furthermore, a parametric study of the depolarization ratio for higher input powers has been performed leading to a depolarization ratio of 3.3 x 10(-2) for 1 kW input power.

    Trvalý link: http://hdl.handle.net/11104/0276000
     
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