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Communication Dans Un Congrès Année : 2020

Polarized spectroscopy and laser operation of Tm3+:YAlO3 crystal on the 3H4 → 3H5 transition

Résumé

Yttrium orthoaluminate (YAlO3) is an attractive laser host crystal for doping with thulium (Tm3+) ions. We report on the absorption and stimulated-emission (SE) cross-sections of this orthorhombic (sp. gr. Pnma) Tm:YAlO3 crystal for the principal light polarizations, E || a, b and c. Polarized absorption data lead to the Judd-Ofelt parameters Ω2 = 1.46, Ω4 = 2.82 and Ω6 = 1.09 [10-20 cm2]. In particular, for the 3H4 → 3H5 transition, it is found a stimulated emission cross section of 0.86×10-20 cm2 at 2278 nm corresponding to an emission bandwidth of ~12 nm (for E || b). Continuous-wave laser operation on this 3H4 → 3H5 transition is achieved with an 1.8 at.% Tm:YAlO3 crystal under laser-pumping at 776 nm. The mid-infrared Tm:YAlO3 laser generated 0.96 W at ~2274 nm with a slope efficiency of 61.8% and a linear laser polarization (E || b). Tm:YAlO3 is promising for mode-locked lasers at ~2.3 μm.
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Dates et versions

hal-02747005 , version 1 (03-06-2020)

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Lauren Guillemot, Pavel Loiko, Esrom Kifle, Alain Braud, Jean-Louis Doualan, et al.. Polarized spectroscopy and laser operation of Tm3+:YAlO3 crystal on the 3H4 → 3H5 transition. Fiber Lasers and Glass Photonics: Materials through Applications II, Apr 2020, Online Only, France. pp.15, ⟨10.1117/12.2555405⟩. ⟨hal-02747005⟩
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