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A Core-Offset Mach Zehnder Interferometer Based on A Non-Zero Dispersion-Shifted Fiber and Its Torsion Sensing Application
Eduardo Huerta-Mascotte 1 , Juan M. Sierra-Hernandez, 2 Ruth I. Mata-Chavez 1 , Daniel Jauregui-Vazquez 2 , Arturo Castillo-Guzman, 3 Julián Moisés Estudillo-Ayala 2 , Ana D. Guzman-Chavez 1 , Roberto Rojas-Laguna 2 , Manuel Lopez-Amo, Jose Miguel Lopez-Higuera, Jose Luis Santos
1  Departamento de Estudios Multidisciplinarios, División de Ingenierías, Universidad de Guanajuato, Av. Universidad s/n, Col. Yacatitas, Yuriría Gto. C.P. 38940, Mexico;(E.H.-M.);(R.I.M.-C.);(A.D.G.-C.)
2  Departamento de Ingeniería Electrónica, División de Ingenierías, Universidad de Guanajuato, Carretera Salamanca-Valle de Santiago km 3.5 + 1.8, Comunidad de Palo Blanco, Salamanca Gto. C.P. 36885, Mexico;(D.J.-V.);(J.M.E.-A.);(R.R.-L.)
3  Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolas de los Garza Nuevo León C.P. 66455, Mexico

Published: 10 June 2016 by MDPI in Sensors
MDPI, Volume 16; 10.3390/s16060856
Abstract: In this paper, an all-fiber Mach-Zehnder interferometer (MZI) based on a non-zero dispersion-shifted fiber (NZ-DSF) is presented. The MZI was implemented by core-offset fusion splicing one section of a NZ-DSF fiber between two pieces of single mode fibers (SMFs). Here, the NZ-DSF core and cladding were used as the arms of the MZI, while the core-offset sections acted as optical fiber couplers. Thus, a MZI interference spectrum with a fringe contrast (FC) of about 20 dB was observed. Moreover, its response spectrum was experimentally characterized to the torsion parameter and a sensitivity of 0.070 nm/° was achieved. Finally, these MZIs can be implemented in a compact size and low cost.
Keywords: Fiber optics, Mach-Zehnder interferometer, Fiber Optic Sensors, Non-zero Dispersion-shifted Fiber
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