Title :
Fiber-optic thermometer using strontium aluminate based long afterglow phosphor
Author :
Aizawa, H. ; Toba, E. ; Katsumata, T. ; Komuro, S. ; Morikawa, T.
Author_Institution :
Fac. of Textile Sci. & Technol., Shinshu Univ., Ueda, Japan
Abstract :
The effect of trap level in the europium doped strontium aluminate (SrAl2O3:Eu2+) phosphors have been evaluated for the fiber-optic thermometer application. Sensitivity and temperature range of the SrAl2O3:Eu2+ phosphor sensor head vary strongly with the trap depth and the trap density of the phosphors. In the temperature ranging from 273 K to 353 K, SrAl2O3:Eu2+ co-doped with Dy3+ or Nd3+, which have trap depth at around Et=0.5 eV, is powerful sensor material having large temperature coefficient.
Keywords :
alumina; dysprosium; electron traps; europium; fibre optic sensors; neodymium; phosphors; strontium compounds; thermometers; 273 to 353 K; Dy; Nd; SrAl2O3:Eu; SrAl2O3:Eu2+ phosphor sensor head; afterglow intensity; europium doped strontium aluminate phosphors; fiber-optic thermometer; long afterglow phosphor; sensor material; temperature coefficient; temperature range; temperature sensor; trap density; trap depth; trap level; Optical fiber devices; Optical fiber sensors; Optical materials; Phosphorescence; Phosphors; Powders; Sensor phenomena and characterization; Strontium; Temperature distribution; Temperature sensors;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1278903
