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

Volume

1

fYear

2003

fDate

22-24 Oct. 2003

Firstpage

92

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2003. Proceedings of IEEE

Print_ISBN

0-7803-8133-5

Type

conf

DOI

10.1109/ICSENS.2003.1278903

Filename

1278903