Investigation of Tm3+/Yb3+ co-doped germanate-tellurite glasses for efficient 2 µm mid-infrared laser materials

Abstract : The Tm3+/Yb3+ co-doped germanate-tellurite glasses with good thermal properties were prepared. Based on the absorption spectra and the Judd-Ofelt theory, the J-O intensity parameters (Omega), radiative transition probability (276.78 s(-1)), fluorescence lifetime (3.89 ms), absorption and emission cross sections (sigma(e)=1.35 x 10(-20) cm(2)) were calculated. The similar to 2 mu m mid-infrared emission resulting from the F-3(4) -> H-3(6) transition of Tm3+ sensitized by Yb3+ was observed pumped by 980 nm LD. Besides, the energy transfer mechanism between Yb3+ and Tm3+ was thoroughly discussed. The measured similar to 2 mu m emission lifetime of Tm3+/Yb3+ co-doped glass can reach as high as 2.38 ms. The above results showed that Tm3+/Yb3+ co-doping glass could be expected to be a promising material to achieve high efficient similar to 2 mu m lasing with a 980 nm LD pumping.
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Aoju Dou, Lingling Shen, Ning Wang, Yangjian Cai, Muzhi Cai, et al.. Investigation of Tm3+/Yb3+ co-doped germanate-tellurite glasses for efficient 2 µm mid-infrared laser materials. Applied Physics B - Laser and Optics, Springer Verlag, 2018, 124 (5), pp.86. ⟨10.1007/s00340-018-6957-2⟩. ⟨hal-01807076⟩

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