Title :
Chromium doped phosphor based fiber-optic thermometer
Author :
Aizawa, H. ; Toba, E. ; Katsumata, T. ; Komuro, S. ; Morikawa, T.
Author_Institution :
Fac. of Textile Sci. & Technol., Shinshu Univ., Ueda, Japan
Abstract :
A variety of chromium (Cr3+) doped phosphors has been studied for a sensor head materials in the fiber-optic thermometer, have been studied. Cr doped alumina (Cr:Al2O3), spinel (Cr:MgAl2O4) and yttrium ortho-aluminate (Cr:YAlO3) crystals are grown using floating zone (FZ) technique. The value and temperature coefficient of photoluminescence (PL) lifetime are evaluated using the fiberoptic thermometer equipment. The value and temperature coefficient of PL lifetime vary greatly with the host materials. Among them, perovskite type Cr:YAlO3 crystal shows the longest PL lifetime and the largest temperature coefficient. Cr doped YAlO3 crystal is a potentially useful sensor material for fiber-optic thermometer due to long PL lifetime and large temperature coefficient of PL lifetime.
Keywords :
alumina; chromium; fibre optic sensors; magnesium compounds; phosphors; photoluminescence; thermometers; yttrium compounds; Cr doped YAlO3 crystal; Cr doped alumina crystals; Cr doped spinel crystals; Cr doped yttrium ortho-aluminate crystals; Cr:Al2O3; Cr:MgAl2O4; Cr:YAlO3; chromium doped phosphor; fiber-optic thermometer; fiberoptic thermometer equipment; floating zone technique; optical fiber; perovskite type Cr:YAlO3 crystal; photoluminescence lifetime; sensor head material; temperature coefficient; Chromium; Crystalline materials; Crystals; Optical fiber devices; Optical fiber sensors; Phosphors; Photoluminescence; Temperature sensors; Thermal sensors; Yttrium;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1278902
