Abstract

A compact temperature sensor based on a fiber loop mirror (FLM) combined with an alcohol-filled high- birefringence photonic crystal fiber (PCF) is proposed and experimentally demonstrated. The output of the FLM is an interference spectrum with many resonant dips, of which the wavelengths are quite sensitive to the change of the refractive index of the filled alcohol for the interference of the FLM. Simulation analysis predicts a high temperature sensitivity, and experimental results show it reaches up to 6.6nm/°C for the 6.1-cm-long PCF used in the FLM.

© 2011 Optical Society of America

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