Radiometric analysis of a fiber optic temperature sensor

We present experimental results demonstrating the performance of the erbium-doped silica fiber as a remote temperature sensor in the temperature interval [26 C - 60 C]. It uses the fluorescence intensity-ratio with energy levels 2H11/2 and 4S3/2. With the measured fluorescence data and incorporating a fiber optic link, its measured responsivity is 0.3 nW/C, its temperature resolution is better than 0.06 C, and the sensitivity is 0.06/C.