Development of a high-temperature fiber-optic thermometer probe using fluorescent decay

Abstract
The design and construction of a fiber‐optic thermometer probe based upon the measurement of fluorescent decaytime and using gold‐coated fibers to achieve such high‐temperature performance are reported. The operation of the probe was monitored in the region from room temperature (and potentially below) to that of ≳500 °C and beyond, where optical pyrometry is a satisfactory technique. The calibration and characteristics of the device are discussed.