Title :
Growth and evaluation of the Tb doped YAlO3 crystals for the fiber-optic thermometer application
Author :
Kiyokawa, Yuka ; Sasagawa, Tomomi ; Suyama, Yusuke ; Aizawa, Hiroaki ; Katsumata, Tooru ; Komuro, Shuji ; Morikawa, Takitaro
Author_Institution :
Sensor Photonics Res. Center, Toyo Univ., Saitama
Abstract :
Tb4O7 doped YAlO3 (YALO) crystals have been grown and evaluated for application in the temperature sensing device. Photoluminescence (PL) peaking at lambda=492 and lambda=545 nm are seen the crystal. Excitation peaks at lambda=360 nm are also seen in PL spectra. PL intensity increases with Tb concentration up to 3 at%, it then decrease with Tb concentration due to concentration quenching. PL intensity decreases gradually with temperature from 300 K to 900 K. Intensity ratio of PL peaks at 492 and 545 nm also varies depending on temperature. From these results, Tb4O7 doped YALO crystals are found to be useful as the sensor material in fluorescence thermometer
Keywords :
crystal growth; fibre optic sensors; fluorescence; optical materials; photoluminescence; radiation quenching; spectral methods of temperature measurement; terbium compounds; thermoluminescence; thermometers; yttrium compounds; 300 to 900 K; 360 nm; 492 nm; 545 nm; PL intensity ratio; PL peak; Tb doped YAlO3 crystals; YAlO3:Tb4O7; concentration quenching; crystal growth; fiber-optic thermometer application; fluorescence thermometer; photoluminescence; sensor material; temperature sensing device; Chromium; Crystalline materials; Crystals; Fluorescence; Optical fiber devices; Optical fiber sensors; Photoluminescence; Temperature dependence; Temperature sensors; Thermal sensors; Fluorescence thermometer; Optical fiber; Phosphor; Tb concentration; Tb doped YALO;
Conference_Titel :
SICE-ICASE, 2006. International Joint Conference
Conference_Location :
Busan
Print_ISBN :
89-950038-4-7
Electronic_ISBN :
89-950038-5-5
DOI :
10.1109/SICE.2006.315519
