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 The Optical Society
A. Harhira, J. Lapointe, and R. Kashyap, "A Simple Bend Sensor Using a Twin Core Fiber Mach-Zehnder Interferometer," in Latin America Optics and Photonics Conference, OSA Technical Digest (CD) (Optical Society of America, 2010), paper TuF3.
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