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Bragg gratings in standard nonhydrogenated fibers for high-temperature sensing

Valmir de Oliveira, Marcia Muller, and Hypolito José Kalinowski

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Abstract

Fiber Bragg gratings engraved in standard telecommunications-grade single-mode fibers without previous hydrogen loading show enhanced thermal stability for high-temperature measurements up to 800 °C. The reflectivity decay at that temperature is adequate for industrial applications with a weekly change of sensing heads.

© 2011 Optical Society of America

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