Er3+–Yb3+ co-doped silicate glass for optical temperature sensor

The Er3+–Yb3+ co-doped silicate glasses have been prepared and the temperature dependence of the fluorescence intensity ratio (FIR) of the green up-conversion emissions about 526 nm and 549 nm in the range of 296–723 K is investigated. The maximum sensitivity and the temperature resolution derived from the FIR technique of the green up-conversion emissions are approximately 0.0033 K−1 and 0.2 K, respectively. The results imply that Er3+–Yb3+ co-doped silicate glass can play an important role in high temperature measurement.