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Infrared to visible up-conversion fluorescence spectroscopy in Er3+-doped chalcogenide glass

1998; Elsevier BV; Volume: 78; Issue: 4 Linguagem: Inglês

10.1016/s0022-2313(98)00002-7

1872-7883

H.T Amorim, M. T. de Araújo, E. A. Gouveia, A.S. Gouveia-Neto, J. A. Medeiros Neto, A. S. B. Sombra,

Luminescence Properties of Advanced Materials

Infrared to visible frequency up-conversion fluorescence spectroscopy in erbium-doped chalcogenide glass samples excited at 1.06 and 1.54 μm, is experimentally investigated. For 1.06 μm pumping, two-photon absorption and phonon-assisted energy transfer account for the excitation of the 2H11/2, 4S3/2 and 4F9/2 emitting levels, yielding intense green emission at 530 and 555 nm and low intensity light at 670 nm, respectively. For excitation at 1.54 μm, much higher up-conversion efficiencies were obtained with the red emission signal around 670 nm presenting higher intensity than the green fluorescence signals. At this excitation wavelength the population of the 2H11/2, 4S3/2 and 4F9/2 excited-state emitting levels is accomplished via energy-transfer and phonon-assisted decays. Saturation of the up-conversion efficiency for 1.54 μm pumping was also observed.