Tm3+-doped lead silicate glass sensitized by Er3+ for efficient ~2 μm mid-infrared laser material

International audienceEr/Tm co-doped lead silicate glasses with low phonon (953cm) and good thermal stability were synthesized. The ~2μm mid-infrared emission resulting from the F→H transition of Tm sensitized by Er has been observed by 808nm LD pumping. The optimal luminescence intensity was obtained in the sample with 1TmO/2.5ErO co-doped. Moreover, the energy transfer mechanism from Er to Tm ion was analyzed. Absorption and emission cross section have been calculated. The calculated maximum emission cross section of Tm is 2.689×10cm at 1863nm. Microparameters of energy transfer between Er and Tm ions have also been analyzed. These results ensure that the prepared Er/Tm co-doped lead silicate glasses have excellent spectroscopic properties in mid-infrared region and provide a beneficial guide for mid-infrared laser material