High dynamic range temperature point sensor using green fluorescence intensity ratio in erbium-doped silica fiber

Abstract

We propose a sensor based on the temperature dependant behavior of the two lines of green emission of the erbium ion. The ratio of the intensities of these two lines presents a very low dependance on pump wavelength and pump power fluctuations. The sensitivity of the ratio is 0.013//spl deg/C between room temperature and 600/spl deg/C. In addition, the measurement is self-calibrated. >