Abstract
doped powders are generally used for fluorescence-based temperature sensing application when near-infrared lasers are the excitation sources of choice. The fluorescence of is produced by nonlinear (upconversion) processes, which generate strong internal heat. Lowering the excitation power causes drastic reduction of the fluorescence signal, and as a consequence the sensor applicability of doped powders becomes compromised. Here we propose the use of the downconverted fluorescence of produced by efficient energy transfer from as an alternative temperature sensing system. Our results are presented for yttrium silicate powders prepared by combustion synthesis.
© 2014 Optical Society of America
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