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Optical temperature sensing using upconversion fluorescence emission in Er3+/Yb3+-codoped chalcogenide glass

1998; American Institute of Physics; Volume: 73; Issue: 5 Linguagem: Inglês

10.1063/1.121861

1520-8842

P. V. dos Santos, M. T. de Araújo, A.S. Gouveia-Neto, J. A. Medeiros Neto, A. S. B. Sombra,

Phase-change materials and chalcogenides

Optical temperature sensing using upconversion fluorescence emission in Er3+/Yb3+-codoped Ga2S3:La2O3 chalcogenide glass excited at 1.06 μm is reported. Temperature measurements in the region of 20–225 °C with a resolution of approximately 0.5 °C using excitation powers of a few tens of milliwatts were obtained. The temperature sensing mechanism is independent of variations in the excitation intensity, possible fluctuations of transmission, and utilizes a simple signal detection and processing system. The results also revealed that the glass host material plays an important role in the performance of the sensing system.