Title :
Characteristics of chromium doped spinel crystals for a fiber-optic thermometer application
Author :
Aizawa, Hiroaki ; Toba, Eiji ; Katsumata, Tooru ; Komuro, Shuji ; Morikawa, Takitaro
Author_Institution :
Fac. of Textile Sci. & Technol., Shinshu Univ., Nagano, Japan
Abstract :
Thermometer probe using the chromium doped spinel crystals, MgAl2O4:Cr3+, has been fabricated and the wavelength dependences of PL lifetime are evaluated as compared with those using ruby crystals. Lifetimes and temperature coefficients of the spinel crystals (τ=10 ms, 37 μs/K), which were typically 3 times larger than that of the ruby crystals (τ=4 ms, 10 μs/K), varied from 4.74 ms to 1.65 ms with wavelength from 667.5 nm to 780 nm.
Keywords :
chromium; fibre optic sensors; magnesium compounds; photoluminescence; thermometers; 10 ms; 4 ms; 4.74 to 1.65 ms; 667.5 to 780 nm; Cr doped spinel crystals; MgAl2O4:Cr3+; fiber-optic thermometer application; photoluminescence lifetime; ruby crystals; wavelength dependences; Chromium; Crystalline materials; Crystals; Fluorescence; Optical fiber devices; Optical fiber sensors; Probes; Temperature dependence; Temperature measurement; Temperature sensors;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195578
