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A Simple Bend Sensor Using a Twin Core Fiber Mach-Zehnder Interferometer

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Abstract

A simple bend sensor based on a multimode fiber combined with a twin-core fiber is proposed. The section of twin-core fiber is spliced between a section of multimode fiber and a single mode fiber. The bend shifts the interference fringe peak wavelengths which are monitored. A shift toward shorter wavelengths is observed. This device is simple to fabricate, and is used as a bend sensor with good sensitivity.

© 2010 Optical Society of America

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