Figure 9From: Use of thulium-sensitized rare earth-doped low phonon energy crystalline hosts for IR sourcesFluorescence from 1,600 to 2,800 nm from Tm3+-Pr3+:KPb 2 Cl 5 . Fluorescence resulting from 1,483-nm pumping of Tm3+-Pr3+:KPb2Cl5 compared to fluorescence resulting from 805-nm pumping. The sample has a Pr3+ concentration of 1.5 × 1020 ions/cm3 and a Tm3+ concentration of 3.0 × 1020 ions/cm3.Back to article page