Optical-fiber temperature sensor based on upconversion-excited fluorescence
- 1 October 1990
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 15 (19) , 1100-1102
- https://doi.org/10.1364/ol.15.001100
Abstract
The codoping of a heavy-metal fluoride glass by two rare-earth ions, erbium and ytterbium, permits the semiconductor laser infrared excitation of two visible neighboring fluorescence lines of erbium by upconversion, the intensity ratio of which is a single variable function of temperature.Keywords
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