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Response of 1.6 μm Er:Y3Al5O12 fiber-optic temperature sensor up to 1520 K

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3 Author(s)
Henry, D.M. ; Department of Physics, University of South Florida, Tampa, Florida 33620-5700 ; Herringer, J.H. ; Djeu, N.

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Fiber-optic temperature sensors based on fluorescence decay of the 1.6 μm transition in Er:Y3Al5O12 (Er:YAG) have been operated up to 1520 K. The probes are of a monolithic construction consisting of a single-crystal YAG lead fiber and an Er:YAG tip. The temperature-dependent fluorescence decay data show the dominance of the phonon mode at 220 cm-1 in mediating multiphonon relaxation in YAG at high temperatures. Such a sensor was used in the direct measurement of temperature in the interior of molten aluminum. © 1999 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:74 ,  Issue: 23 )

Date of Publication:

Jun 1999

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