Visible and near infra-red up-conversion in Tm3 /Yb3 co-doped silica fibers under 980 nm excitation
DA Simpson, WEK Gibbs, SF Collins, W Blanc, B Dussardier, G Monnom, P Peterka, GW Baxter
OPTICS EXPRESS | OPTICAL SOC AMER | Published : 2008
The spectroscopic properties of Tm(3+)/Yb(3+) co-doped silica fibers under excitation at 980 nm are reported. Three distinct up-conversion fluorescence bands were observed in the visible to near infra-red regions. The blue and red fluorescence bands at 475 and 650 nm, respectively, were found to originate from the (1)G(4) level of Tm(3+). A three step up-conversion process was established as the populating mechanism for these fluorescence bands. The fluorescence band at 800 nm was found to originate from two possible transitions in Tm(3+); one being the transition from the (3)H(4) to (3)H(6) manifold which was found to dominate at low pump powers; the other being the transition from the (1)G..View full abstract
This work was supported by the Australian Research Council, and Centre National de la Recherche Scientifique, in France.