C4.1 Photonic Thermometry at PTB – Promising First Results for Contact Temperature Metrology Utilizing Optical Sensors

Abstract

Photonic sensors offer new possibilities for the metrological temperature determination in specific applications including high electric fields or harsh environments. Within two EU projects the PTB develop and validate different photonic thermometers from 0 °C to over 1500 °C. The aim of this work is to develop and validate novel accurate photonic thermometers with uncertainties in the mK range and sensors for application within harsh environments at high temperatures. We show first results using silicon ring resonators which achieve high quality factors (Q ≈ 160 000) and over 15 dB filter contrast.