Abstract
Optical thermometry based upon infrared excited upconversion
fluorescence emission in Er3+- and Er3+-Yb3+- doped Ga2S3:La2O3
chalcogenide glasses excited at 1.54 and 1.06 mu m, respectively, is
presented, Temperature sensing in the region of 20 degrees C-220 degrees
C with 0.3 degrees C accuracy using excitation powers readily obtainable
from commercially available semiconductor lasers was achieved, The
temperature sensing approach is independent of fluctuations in
excitation intensity and transmission and requires a simple and low-cost
signal detection and processing system. The results also indicate that
the glassy host material plays a major role in the performance of the
sensing system.
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