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Optical and physical properties of Er3+-doped oxy-fluoride tellurite glasses

2010; Elsevier BV; Volume: 33; Issue: 3 Linguagem: Inglês

10.1016/j.optmat.2010.09.027

1873-1252

E. F. Chillcce, Ítalo Odone Mazali, Oswaldo Luiz Alves, Luíz C. Barbosa,

Solid State Laser Technologies

In this manuscript we present the effects of ZnF2 concentration on the optical and physical properties of Er3+-doped oxy-fluoride tellurite glasses (7500 ppm Er2O3-(80−x)TeO2-xZnF2-20ZnO, where x = 5, 10, 15, 20, 25 and 30 mol%). In general, as the concentration of ZnF2 increases: (i) the thermal stability, the optical transparency window, and the lifetime of the 4I13/2 level increase; (ii) the density, the linear refractive index, the Rayleigh scattering loss, and the OH− ion concentration decrease; and (iii) the Er3+ ion emission cross section spectrum is quenched and the bandwidth is reduced. The 4I13/2 level lifetime increase may be associated with the luminescence re-absorption and the radiative transition (4S3/2 → 4I13/2) processes, since both processes may contribute to the 4I13/2 level population. The Er3+ ion emission cross section spectrum (at around 1550 nm) of oxy-fluoride tellurite glass containing 30 mol% of ZnF2 was very similar to those of Fluoride glasses.