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Thermal effect on upconversion fluorescence emission in Er-doped chalcogenide glasses under anti-Stokes, Stokes and resonant excitation

2003; Elsevier BV; Volume: 22; Issue: 3 Linguagem: Inglês

10.1016/s0925-3467(02)00288-4

1873-1252

C DASILVA, M.T. deAraujo,

Optical properties and cooling technologies in crystalline materials

We investigate thermal effects upon infrared to visible frequency upconversion fluorescence emission in Er3+-doped chalcogenide glasses, pumped under anti-Stokes, Stokes and resonant excitation. The upconversion emission signals is found to decrease with increasing temperature in the range of 23–200 °C. The observed thermal effect is modeled by conventional rate equations considering a temperature-dependent effective absorption cross-section for the 4I15/2→4I9/2 and 4I11/2→4F3/2, 4F5/2 erbium transitions. The temperature dependence is mainly attributed the nonradiative decays. This model accurately reproduces the experimental results.