Title :
Fiber-Optic Thermometer Using Thermal Radiation and Thermally Excited Luminescence
Author :
Katsumata, T. ; Morita, K. ; Aizawa, H. ; Komuro, S. ; Morikawa, T.
Author_Institution :
Sensor Photonics Res. Center, Toyo Univ., Saitama
Abstract :
Thermally excited visible light luminescence is observed from SiO 2 glass doped with rare-earth elements. Thermal radiation similar to the black body radiation was observed in the SiO2 doped with Sc, Y, La, Ce, Pr, Eu, Tb, Lu, Gd, Sm. Peak intensities of radiations from these sensor materials increase sensitively with temperature. Intensity ratio at different wavelengths is found to be suitable for the temperature measurement. Thermal activation energy of these elements is relatively larger than those of thermally excited f-f transitions seen in Er, Tm, Ho, Nd, Yb and Dy doped SiO2. Thermal radiation from rare-earth doped SiO2 is potentially applicable as a sensor material in the fiber-optic thermal radiation thermometer
Keywords :
cerium; europium; fibre optic sensors; gadolinium; lanthanum; lutetium; optical glass; photoluminescence; praseodymium; samarium; scandium; silicon compounds; spectral methods of temperature measurement; terbium; thermoluminescence; thermometers; yttrium; SiO2: Sc,Y,La,Ce,Pr,Eu,Tb,Lu,Gd,Sm; fiber-optic thermometer; rare-earth doped glass; sensor materials; thermal activation energy; thermal radiation; thermally-excited visible light luminescence; Erbium; Fluorescence; Luminescence; Neodymium; Optical fiber devices; Optical fiber sensors; Powders; Temperature measurement; Temperature sensors; Thermal sensors; Thermal radiation; optical fiber; rare-earth metals; thermally excited luminescence; thermometer;
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.2006.315279
