Energy transfer up-conversion in Tm3+-doped silica fiber

David A. Simpson (1) , Gregory W. Baxter (2) , Stephen F. Collins (3) , W.E.K. Gibbs (4) , Wilfried Blanc (5) , Bernard Dussardier (5) , Gérard Monnom (5)

1 Optical Technology Research Laboratory
2 OTRL - Optical Technology Research Laboratory
3 OTRL - Optical Technology Research Laboratory
4 Centre for Atom Optics and Ultrafast Spectroscopy
5 LPMC - Laboratoire de physique de la matière condensée

A study of the mechanisms responsible for the infra-red to near infra-red up-conversion in Tm3+-doped silica fibers is presented. Upconversion luminescence was observed from the 3H4 level of Tm3+ under 1586 nm pumping into the 3F4 level. The quadratic dependence of the up-conversion luminescence at 800 nm on the 1800 nm luminescence from the 3F4 level confirms that the 3H4 level is populated by a two photon process. Two possible processes are proposed as mechanisms responsible for the up-conversion: excited state absorption and energy transfer up-conversion. The decay characteristics of the luminescence from the 3H4 level were studied under direct and indirect pumping at 786 and 1586 nm, respectively. By comparing the decay waveforms to the solution of a simple set of rate equations, the energy transfer up-conversion process (3F4, 3F4 ! 3H4, 3H6) was established at Tm2O3 concentrations greater than 200 ppm.

Mots clés: Optical fibers; Optical spectroscopy; Absorption; Luminescence; Up-conversion; Time resolved measurements; Alumino-silicates; Silica; Rare-earths in glasses

Domaines: Optique [physics.optics]; Optique / photonique

David A. Simpson, Gregory W. Baxter, Stephen F. Collins, W.E.K. Gibbs, Wilfried Blanc, et al.. Energy transfer up-conversion in Tm3+-doped silica fiber. Journal of Non-Crystalline Solids, 2005, 352, pp.136-141. ⟨hal-00461660⟩