Recent models of Apple Watch–the Series 8 and later, to be precise–are equipped with a temperature sensor. That might sound useful for a variety of health purposes, but in practice, there are ...

Abstract: Sapphire fiber can withstand temperatures of around 2000 °C, but it is multimoded, giving poor precision sensors. We have demonstrated a single-mode sapphire fiber Bragg grating temperature ...

Abstract: In this study, a distributed multi-channel fiber-optic sensor for simultaneous measurement of relative humidity (RH) and temperature with finer gauge length based on spatial-domain ...