Title :
Long duration phosphor for a fiber-optic thermometer
Author :
Aizawa, Hiroaki ; Toba, Eiji ; Katsumata, Tooru ; Takahashi, Jyunko ; Matsunaga, Katsuji ; Komuro, Shuji ; Morikawa, Takitaro
Author_Institution :
Fac. of Textile Sci. & Technol., Shinshu Univ., Nagano, Japan
Abstract :
The intensity of afterglow phosphorescence and lifetime from the fiber-optic thermometer using long duration phosphor, SrAl2O4:Eu2+,Dy3+, have been evaluated. In the long phosphorescent sensor head, the intensity of afterglow phosphorescence increases greatly and linearly with the temperature ranging from 270 K to 320 K with the temperature coefficient of 1.3%·K-1. Temperature coefficient of the afterglow intensity is found to be more sensitive than that of PL lifetime.
Keywords :
afterglows; dysprosium; europium; fibre optic sensors; phosphorescence; phosphors; photoluminescence; radiative lifetimes; strontium compounds; temperature sensors; 270 to 320 K; SrAl2O4:Eu,Dy; afterglow phosphorescence intensity; broad luminescence peaking; fiber-optic thermometer; long duration phosphor; long phosphorescent sensor head; phosphorescence lifetime; photoluminescence lifetime; temperature coefficient; thermal excitation; trapped carrier; Band pass filters; Light emitting diodes; Optical fiber devices; Optical fiber sensors; Phosphorescence; Phosphors; Photoluminescence; Temperature sensors; Textile fibers; Thermal sensors;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195577
