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Temperature sensor based on the power reflected by a Bragg grating in a tapered fiber

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Abstract

We present a temperature sensor based on two chirped gratings made in optical fibers tapered by fusion. One of the gratings has a metallic shielding and acts as sensor element, whereas the second grating provides a reference signal. The sensor is interrogated by measuring the power reflected by the two gratings, and the system has an accuracy of 0.05 °C over a linear operation range of more than 10 °C that can be adjusted in the fabrication process.

© 2004 Optical Society of America

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