E. Maurice et al., SELF-REFERENCED POINT TEMPERATURE SENSOR-BASED ON A FLUORESCENCE INTENSITY RATIO IN YB3-DOPED SILICA FIBER(), Applied optics, 36(31), 1997, pp. 8264-8269
An optical fiber temperature sensor, based on the fluorescence intensi
ty ratio from the F-2(5/2)a and F-2(5/2)b Stark sublevels in ytterbium
-doped silica fiber, has been investigated. Results of a sensor protot
ype demonstrate an accuracy near 1 degrees C in a 600 degrees C temper
ature range. Changes in the fluorescence intensity ratio because of va
riation in pump power, pump wavelength, and induced fiber bending loss
are demonstrated to be small, supporting development of a practical s
ensor based on the technique described. (C) 1997 Optical Society of Am
erica.