Fiber ringdown temperature sensors

Abstract

A new method of developing fiber temperature sensors using a fiber Bragg grating-loop ringdown scheme is introduced. With this new technique, temperature measurements are converted to measuring time constants. Temperature sensing up to 593°C has been demonstrated using a proof-of-concept device. The sensor's stability, repeatability, sensitivity, and dynamic range are also explored. © 2005 Society of Photo-Optical Instrumentation Engineers.