High sensitivity inline fiber Mach-Zehnder interferometer bend sensor using a twin core fiber
A. Harhira, J. Lapointe, R. Kashyap, Polytechnic School of Montréal (Canada)
A novel Mach–Zehnder interferometer 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 curvature induced wavelength shifts on the interference fringes is experimentally monitored. A blue shift is observed. This device is simple to fabricate, and is used as a bend sensor with good sensitivity.
