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Chemical sensor using Mach-Zehnder interferometer based on a pair of largely tilted fiber gratings

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We propose an in-fiber Mach-Zehnder interferometer formed by a pair of largely tilted fiber gratings. The interference spectral characteristics have been investigated. The experimental results using this device as a chemical sensor have a sensitivity as high as 719nm/RIU.

© 2012 Optical Society of America

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