Synergy between NIR luminescence and thermal emission toward highly sensitive NIR operating emissive thermometry

There are many figures of merit, which determine suitability of luminescent thermometers for practical applications. These include thermal sensitivity, thermal accuracy as well as ease and cost effectivness of technical implementation. A novel contactless emission thermometer is proposed, which takes advantage of the coexistence of photoluminescence from Nd 3+ doping ions and black body emission in transparent Nd 3+ doped-oxyfluorotellurite glass host matrix. The opposite temperature dependent emission from these two phenomena, enables to achieve exceptionally high relative sensitivity S R = 8.2%/°C at 220 °C. This enables to develop new type of emissive noncontact temperature sensors.