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Direct measurement high resolution wide range extreme temperature optical sensor using an all-silicon carbide probe

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Abstract

We propose and demonstrate a temperature sensing method using an all-silicon carbide probe that combines wavelength-tuned signal processing for coarse measurements and classical Fabry–Perot etalon peak shift for fine measurements. This method gives direct unambiguous temperature measurements with a high temperature resolution over a wide temperature range. Specifically, temperature measurements from room temperature to 1000°C are experimentally demonstrated with an estimated resolution varying from 0.66°C at room temperature to 0.12°C at 1000°C. The proposed sensor has applications in next-generation greener gas turbines for power production.

© 2009 Optical Society of America

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