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Refractive index sensor based on a pair of hybrid 45° and 81° tilted fiber gratings

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Abstract

A hybrid structure comprising of a 45° and an 81° TFG based RI sensor has been demonstrated. The experiment results show a higher RI sensitivity, being around 180nm/RIU at RI=1.345 and 926nm/RIU at RI=1.412 region.

© 2014 Optical Society of America

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