Tm3+-doped lead silicate glass sensitized by Er3+ for efficient similar to 2 mu m mid-infrared laser material

International audienceEr3+/Tm3+ co-doped lead silicate glasses with low phonon (953 cm(-1)) and good thermal stability were synthesized. The similar to 2 mu m mid-infrared emission resulting from the F-3(4) -> H-3(6) transition of Tm3+ sensitized by Er3+ has been observed by 808 nm LD pumping. The optimal luminescence intensity was obtained in the sample with 1Tm(2)O(3)/2.5Er(2)O(3) co-doped. Moreover, the energy transfer mechanism from Er3+ to Tm3+ ion was analyzed. Absorption and emission cross section have been calculated. The calculated maximum emission cross section of Tm3+ is 2.689 x 10(-21) cm(2) at 1863 nm. Microparameters of energy transfer between Er3+ and Tm3+ ions have also been analyzed. These results ensure that the prepared Er3+/Tm3+ co-doped lead silicate glasses have excellent spectroscopic properties in mid-infrared region and provide a beneficial guide for mid-infrared laser material. (C) 2018 Elsevier B.V. All rights reserved